Lithium tetrachloroaluminate

Lithium tetrachloroaluminate (LAC, lithium aluminium chloride) is an inorganic compound, a tetrachloroaluminate of lithium, with the formula LiAlCl4.[1]

Lithium tetrachloroaluminate
Names
IUPAC name
lithium tetrachloroaluminate
Other names
lithium aluminium chloride; LAC
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.396
EC Number
  • 237-850-9
  • InChI=1S/Al.4ClH.Li/h;4*1H;/q+3;;;;;+1/p-4 Y
    Key: AQLRWYUVWAYZFO-UHFFFAOYSA-J Y
  • InChI=1/Al.4ClH.Li/h;4*1H;/q+3;;;;;+1/p-4/rAlCl4.Li/c2-1(3,4)5;/q-1;+1
    Key: AQLRWYUVWAYZFO-VCMAQHAHAL
  • [Li+].Cl[Al-](Cl)(Cl)Cl
Properties
LiAlCl4
Molar mass 175.72 g·mol−1
Appearance white crystals
Melting point 146
Hazards
GHS labelling:
Danger
H302, H312, H314, H332
P260, P261, P264, P270, P271, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P363, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

Solution of lithium tetrachloroaluminate in thionyl chloride is the liquid cathode and electrolyte of some lithium batteries, e.g. the lithium-thionyl chloride cell. Another cathode-electrolyte formulation is lithium tetrachloroaluminate+thionyl chloride+sulfur dioxide+bromine.


Other salts used in lithium battery electrolytes are lithium bromide, lithium perchlorate, lithium tetrafluoroborate, and lithium hexafluorophosphate; less common ones are lithium chloride, lithium iodide, lithium chlorate, lithium nitrate, lithium hexafluoroarsenate, lithium hexafluorosilicate (i.e. lithium and hexafluorosilicic acid), lithium bis(trifluoromethanesulfonyl)imide, and lithium trifluoromethanesulfonate.[2]

References
  1. Perenthaler, E.; Schulz, Heinz; Rabenau, A. "Crystal structures of lithium tetrachloroaluminate and sodium tetrachloroaluminate as a function of temperature" Zeitschrift für Anorganische und Allgemeine Chemie (1982), 491, 259-65. doi:10.1002/zaac.19824910133
  2. USA US20080280197 A1, Masaki Machida, "Spirally wound non-aqueous electrolyte secondary battery", published 13 Nov 2008, assigned to Sony Corporation


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