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According to a 2011 study by [[Lawrence Berkeley National Laboratory]] and the [[University of California, Berkeley]], the currently estimated reserve base of lithium should not be a limiting factor for large-scale battery production for electric vehicles because an estimated 1 billion 40 [[kWh]] Li-based batteries could be built with current reserves<ref>{{cite journal |last1=Wadia |first1=Cyrus |last2=Albertus |first2=Paul |last3=Srinivasan |first3=Venkat |title=Resource constraints on the battery energy storage potential for grid and transportation applications |journal=Journal of Power Sources |volume=196 |issue=3 |year=2011 |pages=1593–8 |doi=10.1016/j.jpowsour.2010.08.056 |bibcode=2011JPS...196.1593W }}</ref> - about 10&nbsp;kg of lithium per car.<ref>{{cite web|url=http://www.anl.gov/energy-systems/publication/lithium-ion-batteries-examining-material-demand-and-recycling-issues|title=Lithium-Ion Batteries: Examining Material Demand and Recycling Issues|author=Gaines, LL. Nelson, P.|publisher=[[Argonne National Laboratory]]|date=2010|accessdate=11 June 2016|deadurl=no|archiveurl=https://web.archive.org/web/20160803104250/http://www.anl.gov/energy-systems/publication/lithium-ion-batteries-examining-material-demand-and-recycling-issues|archivedate=3 August 2016|df=dmy-all}}</ref> Another 2011 study at the [[University of Michigan]] and [[Ford Motor Company]] found enough resources to support global demand until 2100, including the lithium required for the potential widespread transportation use. The study estimated global reserves at 39 million tons, and total demand for lithium during the 90-year period analyzed at 12–20 million tons, depending on the scenarios regarding economic growth and recycling rates.<ref>{{cite web|url=http://www.greencarcongress.com/2011/08/lithium-20110803.html|title=University of Michigan and Ford researchers see plentiful lithium resources for electric vehicles|publisher=[[Green Car Congress]]|date=3 August 2011|accessdate=11 August 2011|deadurl=no|archiveurl=https://web.archive.org/web/20110916075249/http://www.greencarcongress.com/2011/08/lithium-20110803.html|archivedate=16 September 2011|df=dmy-all}}</ref>
According to a 2011 study by [[Lawrence Berkeley National Laboratory]] and the [[University of California, Berkeley]], the currently estimated reserve base of lithium should not be a limiting factor for large-scale battery production for electric vehicles because an estimated 1 billion 40 [[kWh]] Li-based batteries could be built with current reserves<ref>{{cite journal |last1=Wadia |first1=Cyrus |last2=Albertus |first2=Paul |last3=Srinivasan |first3=Venkat |title=Resource constraints on the battery energy storage potential for grid and transportation applications |journal=Journal of Power Sources |volume=196 |issue=3 |year=2011 |pages=1593–8 |doi=10.1016/j.jpowsour.2010.08.056 |bibcode=2011JPS...196.1593W }}</ref> - about 10&nbsp;kg of lithium per car.<ref>{{cite web|url=http://www.anl.gov/energy-systems/publication/lithium-ion-batteries-examining-material-demand-and-recycling-issues|title=Lithium-Ion Batteries: Examining Material Demand and Recycling Issues|author=Gaines, LL. Nelson, P.|publisher=[[Argonne National Laboratory]]|date=2010|accessdate=11 June 2016|deadurl=no|archiveurl=https://web.archive.org/web/20160803104250/http://www.anl.gov/energy-systems/publication/lithium-ion-batteries-examining-material-demand-and-recycling-issues|archivedate=3 August 2016|df=dmy-all}}</ref> Another 2011 study at the [[University of Michigan]] and [[Ford Motor Company]] found enough resources to support global demand until 2100, including the lithium required for the potential widespread transportation use. The study estimated global reserves at 39 million tons, and total demand for lithium during the 90-year period analyzed at 12–20 million tons, depending on the scenarios regarding economic growth and recycling rates.<ref>{{cite web|url=http://www.greencarcongress.com/2011/08/lithium-20110803.html|title=University of Michigan and Ford researchers see plentiful lithium resources for electric vehicles|publisher=[[Green Car Congress]]|date=3 August 2011|accessdate=11 August 2011|deadurl=no|archiveurl=https://web.archive.org/web/20110916075249/http://www.greencarcongress.com/2011/08/lithium-20110803.html|archivedate=16 September 2011|df=dmy-all}}</ref>


On June 9, 2014, the ''Financialist'' stated that demand for lithium was growing at more than 12% a year. According to Credit Suisse, this rate exceeds projected availability by 25%. The publication compared the 2014 lithium situation with oil, whereby "higher oil prices spurred investment in expensive deepwater and oil sands production techniques"; that is, the price of lithium will continue to rise until more expensive production methods that can boost total output receive the attention of investors.<ref>{{cite web|title=The Precious Mobile Metal|url=http://www.thefinancialist.com/spark/the-precious-mobile-metal/|website=The Financialist|publisher=Credit Suisse|accessdate=19 June 2014|date=9 June 2014|deadurl=no|archiveurl=https://web.archive.org/web/20160223144634/https://www.thefinancialist.com/spark/the-precious-mobile-metal/|archivedate=23 February 2016|df=dmy-all}}</ref>
On June 9, 2014, the ''Financialist'' stated that demand for lithium was growing at more than 12% a year. According to Credit Suisse, this rate exceeds projected availability by 25%. The publication compared the 2014 lithium situation with oil, whereby "higher oil prices spurred investment in expensive deepwater and oil sands production techniques"; that is, the price of lithium will continue to rise until more expensive production methods that can boost total output receive the attention of investors.<ref>{{cite web|title=The Precious Mobile Metal|url=http://www.thefinancialist.com/spark/the-precious-mobile-metal/|website=The Financialist|publisher=Credit Suisse|accessdate=19 June 2014|date=9 June 2014|deadurl=yes|archiveurl=https://web.archive.org/web/20160223144634/https://www.thefinancialist.com/spark/the-precious-mobile-metal/|archivedate=23 February 2016|df=dmy-all}}</ref>


=== Pricing ===
=== Pricing ===

Revision as of 17:05, 3 January 2018

This article is about the chemical element. For the use of lithium as a medication, see Lithium (medication). For other uses, see Lithium (disambiguation).
Lithium, 3Li
Lithium floating in oil
Lithium
Pronunciation/ˈlɪθiəm/ ​(LITH-ee-əm)
Appearancesilvery-white
Standard atomic weight Ar°(Li)
Lithium in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
H
↑
Li
↓
Na
helium ← lithium → beryllium
kJ/mol
Heat of vaporization136 kJ/mol
Molar heat capacity24.860 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 797 885 995 1144 1337 1610
Atomic properties
Discovery
Johan August Arfwedson (1817)
First isolationWilliam Thomas Brande (1821)
Isotopes of lithium
Main isotopes[6] Decay
abun­dance half-life (t1/2) mode pro­duct
6Li 4.85%
stable
7Li 95.15% stable
 Category: Lithium
| references

Lithium (from

luster, but moist air corrodes it quickly to a dull silvery gray, then black tarnish. It never occurs freely in nature, but only in (usually ionic) compounds, such as pegmatitic minerals which were once the main source of lithium. Due to its solubility as an ion, it is present in ocean water and is commonly obtained from brines. Lithium metal is isolated electrolytically from a mixture of lithium chloride and potassium chloride
.

The

staged thermonuclear weapons.[8]

Lithium and its compounds have several industrial applications, including heat-resistant glass and

lithium grease lubricants, flux additives for iron, steel and aluminium production, lithium batteries, and lithium-ion batteries
. These uses consume more than three quarters of lithium production.

Lithium is present in biological systems in trace amounts; its functions are uncertain. Lithium salts have proven to be useful as a mood-stabilizing drug in the treatment of bipolar disorder in humans.

Properties

Atomic and physical

Lithium ingots with a thin layer of black nitride tarnish

Like the other

1s orbital, much lower in energy, and do not participate in chemical bonds).[9]

Lithium metal is soft enough to be cut with a knife. When cut, it possesses a silvery-white color that quickly changes to gray as it oxidizes to

lowest melting points among all metals (180 °C), it has the highest melting and boiling points of the alkali metals.[10]

Lithium has a very low density (0.534 g/cm3), comparable with pine wood. It is the least dense of all elements that are solids at room temperature; the next lightest solid element (potassium, at 0.862 g/cm3) is more than 60% denser. Furthermore, apart from helium and hydrogen, it is less dense than any liquid element, being only two thirds as dense as liquid nitrogen (0.808 g/cm3).[11] Lithium can float on the lightest hydrocarbon oils and is one of only three metals that can float on water, the other two being sodium and potassium.

Lithium floating in oil

Lithium's

body-centered cubic. At liquid-helium temperatures (4 K) the rhombohedral structure is prevalent.[15] Multiple allotropic forms have been identified for lithium at high pressures.[16]

Lithium has a mass specific heat capacity of 3.58 kilojoules per kilogram-kelvin, the highest of all solids.[17][18] Because of this, lithium metal is often used in coolants for heat transfer applications.[17]

Chemistry and compounds

Lithium reacts with water easily, but with noticeably less vigor than other alkali metals. The reaction forms hydrogen gas and lithium hydroxide in aqueous solution.[9] Because of its reactivity with water, lithium is usually stored in a hydrocarbon sealant, often petroleum jelly. Though the heavier alkali metals can be stored in more dense substances, such as mineral oil, lithium is not dense enough to be fully submerged in these liquids.[19] In moist air, lithium rapidly tarnishes to form a black coating of lithium hydroxide (LiOH and LiOH·H2O), lithium nitride (Li3N) and lithium carbonate (Li2CO3, the result of a secondary reaction between LiOH and CO2).[20]

n-butyllithium
fragment in a crystal

When placed over a flame, lithium compounds give off a striking crimson color, but when it burns strongly the flame becomes a brilliant silver. Lithium will ignite and burn in oxygen when exposed to water or water vapors.

normal conditions.[22][23]

Lithium has a diagonal relationship with magnesium, an element of similar atomic and ionic radius. Chemical resemblances between the two metals include the formation of a nitride by reaction with N2, the formation of an oxide (Li
2O) and peroxide (Li
2O
2) when burnt in O2, salts with similar solubilities, and thermal instability of the carbonates and nitrides.[20][24] The metal reacts with hydrogen gas at high temperatures to produce lithium hydride (LiH).[25]

Other known

anions to form salts: borates, amides, carbonate, nitrate, or borohydride (LiBH
4). Lithium aluminium hydride
(LiAlH
4) is commonly used as a reducing agent in organic synthesis.

Multiple

van der Waals compound, has been detected at very low temperatures.[27]

Isotopes

Main article: Isotopes of lithium

Naturally occurring lithium is composed of two stable

radioactive isotopes have half-lives that are shorter than 8.6 ms. The shortest-lived isotope of lithium is 4Li, which decays through proton emission and has a half-life of 7.6 × 10−23 s.[30]

7Li is one of the

primordial elements (or, more properly, primordial nuclides) produced in Big Bang nucleosynthesis. A small amount of both 6Li and 7Li are produced in stars, but are thought to be "burned" as fast as produced.[31] Additional small amounts of lithium of both 6Li and 7Li may be generated from solar wind, cosmic rays hitting heavier atoms, and from early solar system 7Be and 10Be radioactive decay.[32] While lithium is created in stars during stellar nucleosynthesis, it is further burned. 7Li can also be generated in carbon stars.[33]

Lithium isotopes fractionate substantially during a wide variety of natural processes,

nuclear halo. The process known as laser isotope separation can be used to separate lithium isotopes, in particular 7Li from 6Li.[35]

Nuclear weapons manufacture and other nuclear physics applications are a major source of artificial lithium fractionation, with the light isotope 6Li being retained by industry and military stockpiles to such an extent that it has caused slight but measurable change in the 6Li to 7Li ratios in natural sources, such as rivers. This has led to unusual uncertainty in the standardized

atomic weight of lithium, since this quantity depends on the natural abundance ratios of these naturally-occurring stable lithium isotopes, as they are available in commercial lithium mineral sources.[36]

Both stable isotopes of lithium can be laser cooled and were used to produce the first quantum degenerate Bose-Fermi mixture.[37]

Occurrence

Lithium is about as common as chlorine in the Earth's upper continental crust, on a per-atom basis.

Astronomical

Main article: Nucleosynthesis

Though it was synthesized in the Big Bang, lithium (together with beryllium and boron), is markedly less abundant in the universe than other elements. This is a result of the comparatively low stellar temperatures necessary to destroy lithium, along with a lack of common processes to produce it.[38]

According to modern cosmological theory, lithium—in both stable isotopes (lithium-6 and lithium-7)—was one of the 3 elements synthesized in the Big Bang.[39] Though the amount of lithium generated in Big Bang nucleosynthesis is dependent upon the number of photons per baryon, for accepted values the lithium abundance can be calculated, and there is a "cosmological lithium discrepancy" in the Universe: older stars seem to have less lithium than they should, and some younger stars have much more.[40] The lack of lithium in older stars is apparently caused by the "mixing" of lithium into the interior of stars, where it is destroyed,[41] while lithium is produced in younger stars. Though it transmutes into two atoms of helium due to collision with a proton at temperatures above 2.4 million degrees Celsius (most stars easily attain this temperature in their interiors), lithium is more abundant than current computations would predict in later-generation stars.[19]

Nova Centauri 2013 is the first in which evidence of lithium has been found.[42]

Lithium is also found in brown dwarf substellar objects and certain anomalous orange stars. Because lithium is present in cooler, less-massive brown dwarfs, but is destroyed in hotter red dwarf stars, its presence in the stars' spectra can be used in the "lithium test" to differentiate the two, as both are smaller than the Sun.[19][43][44] Certain orange stars can also contain a high concentration of lithium. Those orange stars found to have a higher than usual concentration of lithium (such as Centaurus X-4) orbit massive objects—neutron stars or black holes—whose gravity evidently pulls heavier lithium to the surface of a hydrogen-helium star, causing more lithium to be observed.[19]

Terrestrial

Lithium mine production (2016), reserves and resources in tonnes according to USGS[45]
Country Production Reserves[note 1] Resources
 Argentina 5,700 2,000,000 9,000,000
 Australia 14,300 1,600,000 2,000,000+
 Austria - - 100,000+
 Bolivia - - 9,000,000
 Brazil 200 48,000 200,000
 Canada (2010) 480 180,000 2,000,000
 Chile 12,000 7,500,000 7,500,000+
 DR Congo - - 1,000,000
 Mexico - - 200,000
 People's Republic of China 2,000 3,200,000 7,000,000
 Portugal 200 60,000 N/A
 Russia - - 1,000,000
 Serbia - - 1,000,000
 United States W[note 2] 38,000 6,900,000
 Zimbabwe 900 23,000 100,000+
World total 32,500 14,000,000 46,900,000
See also: Lithium minerals

Although lithium is widely distributed on Earth, it does not naturally occur in elemental form due to its high reactivity.

hydrothermal vents.[47]

Estimates for the Earth's crustal content range from 20 to 70 ppm by weight.[20] In keeping with its name, lithium forms a minor part of igneous rocks, with the largest concentrations in granites. Granitic pegmatites also provide the greatest abundance of lithium-containing minerals, with spodumene and petalite being the most commercially viable sources.[20] Another significant mineral of lithium is lepidolite.[49] A newer source for lithium is hectorite clay, the only active development of which is through the Western Lithium Corporation in the United States.[50] At 20 mg lithium per kg of Earth's crust,[51] lithium is the 25th most abundant element.

According to the Handbook of Lithium and Natural Calcium, "Lithium is a comparatively rare element, although it is found in many rocks and some brines, but always in very low concentrations. There are a fairly large number of both lithium mineral and brine deposits but only comparatively few of them are of actual or potential commercial value. Many are very small, others are too low in grade."[52]

The

US Geological Survey estimates that in 2010, Chile had the largest reserves by far (7.5 million tonnes)[53] and the highest annual production (8,800 tonnes). One of the largest reserve bases[note 1] of lithium is in the Salar de Uyuni area of Bolivia, which has 5.4 million tonnes. Other major suppliers include Australia, Argentina and China.[45][54] As of 2015 Czech Geological Survey considered the entire Ore Mountains in the Czech Republic as lithium province. Five deposits are registered, one near Cínovec [cs] is considered as potentially economic deposit with 160 000 tonnes of lithium.[55]

In June 2010,

USGS involvement in any new surveying for minerals in Afghanistan in the past two years. 'We are not aware of any discoveries of lithium,' he said."[57]

Lithia ("lithium brine") is associated with tin mining areas in Cornwall, England and an evaluation project from 400-metre deep test boreholes is under consideration. If successful the hot brines will also provide geothermal energy to power the lithium extraction and refining process.[58]

Biological

Lithium is found in trace amount in numerous plants, plankton, and invertebrates, at concentrations of 69 to 5,760 parts per billion (ppb). In vertebrates the concentration is slightly lower, and nearly all vertebrate tissue and body fluids contain lithium ranging from 21 to 763 ppb.[47] Marine organisms tend to bioaccumulate lithium more than terrestrial organisms.[59] Whether lithium has a physiological role in any of these organisms is unknown.[47]

History

Johan August Arfwedson is credited with the discovery of lithium in 1817

detected the presence of a new element while analyzing petalite ore.[64][65][66][67] This element formed compounds similar to those of sodium and potassium, though its carbonate and hydroxide were less soluble in water and more alkaline.[68] Berzelius gave the alkaline material the name "lithion/lithina", from the Greek word λιθoς (transliterated as lithos, meaning "stone"), to reflect its discovery in a solid mineral, as opposed to potassium, which had been discovered in plant ashes, and sodium, which was known partly for its high abundance in animal blood. He named the metal inside the material "lithium".[9][62][67]

Arfwedson later showed that this same element was present in the minerals

Metallgesellschaft AG, which performed an electrolysis of a liquid mixture of lithium chloride and potassium chloride.[62][77][78]

The production and use of lithium underwent several drastic changes in history. The first major application of lithium was in high-temperature

lithium greases for aircraft engines and similar applications in World War II and shortly after. This use was supported by the fact that lithium-based soaps
have a higher melting point than other alkali soaps, and are less corrosive than calcium based soaps. The small demand for lithium soaps and lubricating greases was supported by several small mining operations, mostly in the US.

The demand for lithium increased dramatically during the

atomic weight of lithium in many standardized chemicals, and even the atomic weight of lithium in some "natural sources" of lithium ion which had been "contaminated" by lithium salts discharged from isotope separation facilities, which had found its way into ground water.[36][79]

Lithium was used to decrease the melting temperature of glass and to improve the melting behavior of

Hall-Héroult process.[80][81] These two uses dominated the market until the middle of the 1990s. After the end of the nuclear arms race, the demand for lithium decreased and the sale of Department of Energy stockpiles on the open market further reduced prices.[79] In the mid 1990s, several companies started to extract lithium from brine which proved to be a less expensive than underground or open-pit mining. Most of the mines closed or shifted their focus to other materials because only the ore from zoned pegmatites could be mined for a competitive price. For example, the US mines near Kings Mountain, North Carolina
closed before the beginning of the 21st century.

The development of lithium ion batteries increased the demand for lithium and became the dominant use in 2007.[82] With the surge of lithium demand in batteries in the 2000s, new companies have expanded brine extraction efforts to meet the rising demand.[83][84]

Production

alt1
alt2
Satellite images of the Salar del Hombre Muerto, Argentina (left), and Uyuni, Bolivia (right), salt flats that are rich in lithium. The lithium-rich brine is concentrated by pumping it into solar evaporation ponds (visible in the left image).
World production trend of lithium

Lithium production has greatly increased since the end of World War II. The metal is separated from other elements in igneous minerals. The metal is produced through electrolysis from a mixture of fused 55% lithium chloride and 45% potassium chloride at about 450 °C.[85]

As of 2015, most of the world's lithium production is in South America, where lithium-containing brine is extracted from underground pools and concentrated by solar evaporation. The standard extraction technique is to evaporate water from brine. Each batch takes from 18 to 24 months.[86]

In 1998, the price of lithium was about 95 USD/kg (or 43 USD/lb).[87]

Reserves

Worldwide identified reserves in 2008 were estimated by the

US Geological Survey (USGS) to be 13 million tonnes,[45] though an accurate estimate of world lithium reserves is difficult.[88][89] One reason for this is that most lithium classification schemes are developed for solid ore deposits, whereas brine is a fluid that is problematic to treat with the same classification scheme due to varying concentrations and pumping effects.[90] The world has been estimated to contain about 15 million tonnes of lithium reserves, while 65 million tonnes of known resources are reasonable. A total of 75% of everything can typically be found in the ten largest deposits of the world.[91] Another study noted that 83% of the geological resources of lithium are located in six brine, two pegmatite, and two sedimentary deposits.[92]

Deposits are found in South America throughout the Andes mountain chain. Chile is the leading producer, followed by Argentina. Both countries recover lithium from brine pools. According to USGS, Bolivia's Uyuni Desert has 5.4 million tonnes of lithium.[93][94]

In the US, lithium is recovered from brine pools in Nevada.[17] Half the world's known reserves are located in Bolivia along the central eastern slope of the Andes. In 2009, Bolivia negotiated with Japanese, French, and Korean firms to begin extraction.[93] A deposit discovered in 2013 in Wyoming's Rock Springs Uplift is estimated to contain 228,000 tons. Additional deposits in the same formation were estimated to be as much as 18 million tons.[95]

Opinions differ about potential growth. A 2008 study concluded that "realistically achievable lithium carbonate production will be sufficient for only a small fraction of future

LiIon propulsion is incompatible with the notion of the 'Green Car'".[54]

According to a 2011 study by

kWh Li-based batteries could be built with current reserves[96] - about 10 kg of lithium per car.[97] Another 2011 study at the University of Michigan and Ford Motor Company found enough resources to support global demand until 2100, including the lithium required for the potential widespread transportation use. The study estimated global reserves at 39 million tons, and total demand for lithium during the 90-year period analyzed at 12–20 million tons, depending on the scenarios regarding economic growth and recycling rates.[98]

On June 9, 2014, the Financialist stated that demand for lithium was growing at more than 12% a year. According to Credit Suisse, this rate exceeds projected availability by 25%. The publication compared the 2014 lithium situation with oil, whereby "higher oil prices spurred investment in expensive deepwater and oil sands production techniques"; that is, the price of lithium will continue to rise until more expensive production methods that can boost total output receive the attention of investors.[99]

Pricing

After the

2007 financial crisis, major suppliers such as Sociedad Química y Minera (SQM) dropped lithium carbonate pricing by 20%.[100] Prices rose in 2012. A 2012 Business Week article outlined the oligopoly in the lithium space: "SQM, controlled by billionaire Julio Ponce, is the second-largest, followed by Rockwood, which is backed by Henry Kravis’s KKR & Co., and Philadelphia-based FMC". Global consumption may jump to 300,000 metric tons a year by 2020 from about 150,000 tons in 2012, to match the demand for lithium batteries that has been growing at about 25% a year, outpacing the 4% to 5% overall gain in lithium production.[101]

Extraction

Lithium salts are extracted from water in

mineral springs, brine
pools, and brine deposits.

Lithium is present in seawater, but commercially viable methods of extraction have yet to be developed.[86]

Another potential source of lithium is the leachates of

geothermal wells, which are carried to the surface.[102] Recovery of lithium has been demonstrated in the field; the lithium is separated by simple filtration.[103] The process and environmental costs are primarily those of the already-operating well; net environmental impacts may thus be positive.[104]

Uses

Estimates of global lithium uses in 2015[105]
  Ceramics and glass (32%)
  Batteries (35%)
  Lubricating greases (9%)
  Continuous casting (5%)
  Air treatment (5%)
  Polymers (4%)
  Primary aluminum production (1%)
  Pharmaceuticals (<1%)
  Other (9%)

Ceramics and glass

Lithium oxide is widely used as a

silica, reducing the melting point and viscosity of the material and leading to glazes with improved physical properties including low coefficients of thermal expansion. Worldwide, this is one of the largest use for lithium compounds.[105][106] Glazes containing lithium oxides are used for ovenware. Lithium carbonate (Li2CO3) is generally used in this application because it converts to the oxide upon heating.[107]

Electrical and electronics

Late in the 20th century, lithium became an important component of battery electrolytes and electrodes, because of its high

lithium-ion polymer battery, lithium iron phosphate battery, and the nanowire battery
.

Lubricating greases

Main article:
Lithium grease

The third most common use of lithium is in greases. Lithium hydroxide is a strong

stearate. Lithium soap has the ability to thicken oils, and it is used to manufacture all-purpose, high-temperature lubricating greases.[17][110][111]

Metallurgy

Lithium (e.g. as lithium carbonate) is used as an additive to

foundry sand for iron casting to reduce veining.[114]

Lithium (as lithium fluoride) is used as an additive to aluminium smelters (Hall–Héroult process), reducing melting temperature and increasing electrical resistance,[115] a use which accounts for 3% of production (2011).[45]

When used as a

Lithium-aluminium alloys).[118]

Silicon nano-welding

Lithium has been found effective in assisting the perfection of silicon nano-welds in electronic components for electric batteries and other devices.[119]

Other chemical and industrial uses

Lithium use in flares and pyrotechnics is due to its rose-red flame.[120]

Pyrotechnics

Lithium compounds are used as

flares.[17][121]

Air purification

hygroscopic and are used as desiccants for gas streams.[17] Lithium hydroxide and lithium peroxide are the salts most used in confined areas, such as aboard spacecraft and submarines, for carbon dioxide removal and air purification. Lithium hydroxide absorbs carbon dioxide
from the air by forming lithium carbonate, and is preferred over other alkaline hydroxides for its low weight.

Lithium peroxide (Li2O2) in presence of moisture not only reacts with carbon dioxide to form lithium carbonate, but also releases oxygen.[122][123] The reaction is as follows:

2 Li2O2 + 2 CO2 → 2 Li2CO3 + O2.

Some of the aforementioned compounds, as well as

aluminum, silicon, titanium, manganese, and iron.[124]

Optics

crystal defects which, when heated, resolve via a release of bluish light whose intensity is proportional to the absorbed dose, thus allowing this to be quantified.[126] Lithium fluoride is sometimes used in focal lenses of telescopes.[17][127]

The high non-linearity of lithium niobate also makes it useful in non-linear optics applications. It is used extensively in telecommunication products such as mobile phones and optical modulators, for such components as resonant crystals. Lithium applications are used in more than 60% of mobile phones.[128]

Organic and polymer chemistry

carbon-carbon bonds. Organolithium compounds are prepared from lithium metal and alkyl halides.[133]

Many other lithium compounds are used as reagents to prepare organic compounds. Some popular compounds include

tert-butyllithium are commonly used as extremely strong bases called superbase
.

Military applications

Metallic lithium and its complex hydrides, such as Li[AlH4], are used as high-energy additives to rocket propellants.[19] Lithium aluminum hydride can also be used by itself as a solid fuel.[134]

The launch of a torpedo using lithium as fuel

The Mark 50 torpedo stored chemical energy propulsion system (SCEPS) uses a small tank of sulfur hexafluoride gas, which is sprayed over a block of solid lithium. The reaction generates heat, creating steam to propel the torpedo in a closed Rankine cycle.[135]

Lithium hydride containing lithium-6 is used in thermonuclear weapons, where it serves as fuel for the fusion stage of the bomb.[136]

Nuclear

Lithium-6 is valued as a source material for

neutron absorber in nuclear fusion. Natural lithium contains about 7.5% lithium-6 from which large amounts of lithium-6 have been produced by isotope separation for use in nuclear weapons.[137] Lithium-7 gained interest for use in nuclear reactor coolants.[138]

Lithium deuteride was used as fuel in the Castle Bravo nuclear device.

nuclear weapons as a fusion material.[139]

thermal neutron capture cross-sections not to poison the fission reactions inside a nuclear fission reactor.[note 3][140]

In conceptualized (hypothetical) nuclear fusion power plants, lithium will be used to produce tritium in magnetically confined reactors using deuterium and tritium as the fuel. Naturally occurring tritium is extremely rare, and must be synthetically produced by surrounding the reacting plasma with a 'blanket' containing lithium where neutrons from the deuterium-tritium reaction in the plasma will fission the lithium to produce more tritium:

6Li + n → 4He + 3H.

Lithium is also used as a source for

Cockroft and Walton in 1932.[141][142]

In 2013, the US Government Accountability Office said a shortage of lithium-7 critical to the operation of 65 out of 100 American nuclear reactors “places their ability to continue to provide electricity at some risk”. The problem stems from the decline of US nuclear infrastructure. The equipment needed to separate lithium-6 from lithium-7 is mostly a cold war leftover. The US shut down most of this machinery in 1963, when it had a huge surplus of separated lithium, mostly consumed during the twentieth century. The report said it would take five years and $10 million to $12 million to reestablish the ability to separate lithium-6 from lithium-7.[143]

Reactors that use lithium-7 heat water under high pressure and transfer heat through heat exchangers that are prone to corrosion. The reactors use lithium to counteract the corrosive effects of boric acid, which is added to the water to absorb excess neutrons.[143]

Medicine

Main article: Lithium (medication)

Lithium is useful in the treatment of

major depression. The active part of these salts is the lithium ion Li+.[144] They may increase the risk of developing Ebstein's cardiac anomaly in infants born to women who take lithium during the first trimester of pregnancy.[145]

Lithium has also been researched as a possible treatment for cluster headaches.[146]

Biological role

Primary food sources of lithium are grains and vegetables, and, in some areas, drinking water also contains significant amounts.[147] Human intake varies depending on location and diet.

Lithium was first detected in human organs and fetal tissues in the late 19th century. In humans there are no defined lithium deficiency diseases, but low lithium intakes from water supplies were associated with increased rates of suicides, homicides and the arrest rates for drug use and other crimes. The biochemical mechanisms of action of lithium appear to be multifactorial and are intercorrelated with the functions of several enzymes, hormones and vitamins, as well as with growth and transforming factors. Evidence now appears to be sufficient to accept lithium as essential; a provisional RDA of 1,000 µg/day is suggested for a 70 kg adult.[147][148]

Precautions

NFPA 704
fire diamond
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid
2
3
2
W
Fire diamond hazard sign for lithium metal[149]

Lithium is

caustic lithium hydroxide. Lithium is safely stored in non-reactive compounds such as naphtha.[150]

Regulation

Some jurisdictions limit the sale of lithium batteries, which are the most readily available source of lithium for ordinary consumers. Lithium can be used to reduce pseudoephedrine and ephedrine to methamphetamine in the Birch reduction method, which employs solutions of alkali metals dissolved in anhydrous ammonia.[151][152]

Carriage and shipment of some kinds of lithium batteries may be prohibited aboard certain types of transportation (particularly aircraft) because of the ability of most types of lithium batteries to fully discharge very rapidly when short-circuited, leading to overheating and possible explosion in a process called thermal runaway. Most consumer lithium batteries have built-in thermal overload protection to prevent this type of incident, or are otherwise designed to limit short-circuit currents. Internal shorts from manufacturing defect or physical damage can lead to spontaneous thermal runaway.[153][154]

See also

Notes

  1. ^ a b Apendixes Archived 6 November 2011 at the Wayback Machine. By USGS definitions, the reserve base "may encompass those parts of the resources that have a reasonable potential for becoming economically available within planning horizons beyond those that assume proven technology and current economics. The reserve base includes those resources that are currently economic (reserves), marginally economic (marginal reserves), and some of those that are currently subeconomic (subeconomic resources)."
  2. ^ withheld to avoid disclosing company proprietary data
  3. ^ Beryllium and fluorine occur only as one isotope, 9Be and 19F respectively. These two, together with 7Li, as well as 2H, 11B, 15N, 209Bi, and the stable isotopes of C, and O, are the only nuclides with low enough thermal neutron capture cross sections aside from actinides to serve as major constituents of a molten salt breeder reactor fuel.

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External links

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