Lithium ion conducting electrolytes
- Tempe, AZ
A liquid, predominantly lithium-conducting, ionic electrolyte having exceptionally high conductivity at temperatures of 100.degree. C. or lower, including room temperature, and comprising the lithium salts selected from the group consisting of the thiocyanate, iodide, bromide, chloride, perchlorate, acetate, tetrafluoroborate, perfluoromethane sulfonate, perfluoromethane sulfonamide, tetrahaloaluminate, and heptahaloaluminate salts of lithium, with or without a magnesium-salt selected from the group consisting of the perchlorate and acetate salts of magnesium. Certain of the latter embodiments may also contain molecular additives from the group of acetonitrile (CH.sub.3 CN) succinnonitrile (CH.sub.2 CN).sub.2, and tetraglyme (CH.sub.3 --O--CH.sub.2 --CH.sub.2 --O--).sub.2 (or like solvents) solvated to a Mg.sup.+2 cation to lower the freezing point of the electrolyte below room temperature. Other particularly useful embodiments contain up to about 40, but preferably not more than about 25, mol percent of a long chain polyether polymer dissolved in the lithium salts to provide an elastic or rubbery solid electrolyte of high ambient temperature conductivity and exceptional 100.degree. C. conductivity. Another embodiment contains up to about but not more than 10 mol percent of a molecular solvent such as acetone.
- Research Organization:
- Arizona State Univ., Tempe, AZ (United States)
- DOE Contract Number:
- FG02-89ER45398
- Assignee:
- Arizona State University (Arizona Board of Regents, a body corporate (Tempe, AZ)
- Patent Number(s):
- US 5506073
- OSTI ID:
- 870370
- Country of Publication:
- United States
- Language:
- English
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conducting
electrolytes
liquid
predominantly
lithium-conducting
ionic
electrolyte
exceptionally
conductivity
temperatures
100
degree
including
temperature
comprising
salts
selected
consisting
thiocyanate
iodide
bromide
chloride
perchlorate
acetate
tetrafluoroborate
perfluoromethane
sulfonate
sulfonamide
tetrahaloaluminate
heptahaloaluminate
magnesium-salt
magnesium
latter
embodiments
contain
molecular
additives
acetonitrile
cn
succinnonitrile
tetraglyme
-o-ch
-ch
-o-
solvents
solvated
mg
cation
freezing
below
particularly
useful
40
preferably
25
mol
percent
chain
polyether
polymer
dissolved
provide
elastic
rubbery
solid
ambient
exceptional
embodiment
contains
10
solvent
acetone
conducting electrolyte
solid electrolyte
particularly useful
ambient temperature
lithium salt
lithium salts
acetate salts
salt selected
ionic electrolyte
predominantly lithium-conducting
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