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Title: Lithium ion conducting electrolytes

Abstract

A liquid, predominantly lithium-conducting, ionic electrolyte is described having exceptionally high conductivity at temperatures of 100 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 C conductivity. Another embodiment contains up to about but not more than 10 mol percent of a molecular solvent such as acetone. 2 figs.

Inventors:
;
Publication Date:
Research Org.:
Arizona State Univ., Tempe, AZ (United States)
OSTI Identifier:
215243
Patent Number(s):
US 5,506,073/A/
Application Number:
PAN: 7-901,669
Assignee:
Arizona State Univ., Tempe, AZ (United States)
DOE Contract Number:  
FG02-89ER45398
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 9 Apr 1996
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; LITHIUM COMPOUNDS; IONIC CONDUCTIVITY; ELECTROLYTES; CHEMICAL COMPOSITION; MAGNESIUM COMPOUNDS; POLYETHYLENE GLYCOLS; ADDITIVES; SOLID ELECTROLYTES

Citation Formats

Angell, C A, and Liu, C. Lithium ion conducting electrolytes. United States: N. p., 1996. Web.
Angell, C A, & Liu, C. Lithium ion conducting electrolytes. United States.
Angell, C A, and Liu, C. Tue . "Lithium ion conducting electrolytes". United States.
@article{osti_215243,
title = {Lithium ion conducting electrolytes},
author = {Angell, C A and Liu, C},
abstractNote = {A liquid, predominantly lithium-conducting, ionic electrolyte is described having exceptionally high conductivity at temperatures of 100 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 C conductivity. Another embodiment contains up to about but not more than 10 mol percent of a molecular solvent such as acetone. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {4}
}