skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Lithium ion conducting electrolytes

Abstract

The present invention relates generally to highly conductive alkali-metal ion non-crystalline electrolyte systems, and more particularly to novel and unique molten (liquid), rubbery, and solid electrolyte systems which are especially well suited for use with high current density electrolytic cells such as primary and secondary batteries.

Inventors:
 [1];  [2];  [3];  [4]
  1. (Mesa, AZ)
  2. (Midland, MI)
  3. (Montgomery Village, MD)
  4. (Tucson, AZ)
Publication Date:
Research Org.:
Arizona State Univ., Tempe, AZ (United States)
OSTI Identifier:
872563
Patent Number(s):
US 5962169
Assignee:
Arizona Board of Regents (Tempe, AZ) CHO
DOE Contract Number:
FG02-89ER45398
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
lithium; conducting; electrolytes; relates; highly; conductive; alkali-metal; non-crystalline; electrolyte; systems; particularly; novel; unique; molten; liquid; rubbery; solid; especially; suited; current; density; electrolytic; cells; primary; secondary; batteries; secondary batteries; conducting electrolyte; electrolytic cells; highly conductive; current density; electrolytic cell; solid electrolyte; electrolyte systems; conducting electrolytes; /429/

Citation Formats

Angell, Charles Austen, Liu, Changle, Xu, Kang, and Skotheim, Terje A. Lithium ion conducting electrolytes. United States: N. p., 1999. Web.
Angell, Charles Austen, Liu, Changle, Xu, Kang, & Skotheim, Terje A. Lithium ion conducting electrolytes. United States.
Angell, Charles Austen, Liu, Changle, Xu, Kang, and Skotheim, Terje A. 1999. "Lithium ion conducting electrolytes". United States. doi:. https://www.osti.gov/servlets/purl/872563.
@article{osti_872563,
title = {Lithium ion conducting electrolytes},
author = {Angell, Charles Austen and Liu, Changle and Xu, Kang and Skotheim, Terje A.},
abstractNote = {The present invention relates generally to highly conductive alkali-metal ion non-crystalline electrolyte systems, and more particularly to novel and unique molten (liquid), rubbery, and solid electrolyte systems which are especially well suited for use with high current density electrolytic cells such as primary and secondary batteries.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month = 1
}

Patent:

Save / Share:
  • The present invention relates generally to highly conductive alkali-metal ion non-crystalline electrolyte systems, and more particularly to novel and unique molten (liquid), rubbery, and solid electrolyte systems which are especially well suited for use with high current density electrolytic cells such as primary and secondary batteries.
  • A liquid, predominantly lithium-conducting, ionic electrolyte is described which has exceptionally high conductivity at temperatures of 100 C or lower, including room temperature. It comprises molten lithium salts or salt mixtures in which a small amount of an anionic polymer lithium salt is dissolved to stabilize the liquid against recrystallization. Further, a liquid ionic electrolyte which has been rubberized by addition of an extra proportion of anionic polymer, and which has good chemical and electrochemical stability, is described. This presents an attractive alternative to conventional salt-in-polymer electrolytes which are not cationic conductors. 4 figs.
  • 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)more » 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.« less
  • A liquid, predominantly lithium-conducting, ionic electrolyte is described which has exceptionally high conductivity at temperatures of 100.degree. C. or lower, including room temperature. It comprises molten lithium salts or salt mixtures in which a small amount of an anionic polymer lithium salt is dissolved to stabilize the liquid against recrystallization. Further, a liquid ionic electrolyte which has been rubberized by addition of an extra proportion of anionic polymer, and which has good chemical and electrochemical stability, is described. This presents an attractive alternative to conventional salt-in-polymer electrolytes which are not cationic conductors.
  • 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.+2more » 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.« less