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Title: Combinations of fluorinated solvents with imide salts or methide salts for electrolytes

Abstract

Provided are electrochemical cells and electrolytes used to build such cells. The electrolytes include imide salts and/or methide salts as well as fluorinated solvents capable of maintaining single phase solutions at between about -30.degree. C. to about 80.degree. C. The fluorinated solvents, such as fluorinated carbonates, fluorinated esters, and fluorinated esters, are less flammable than their non-fluorinated counterparts and improve safety characteristics of cells containing these solvents. The amount of fluorinated solvents in electrolytes may be between about 30% and 80% by weight not accounting weight of the salts. Linear and cyclic imide salts, such as LiN(SO.sub.2CF.sub.2CF.sub.3).sub.2, and LiN(SO.sub.2CF.sub.3).sub.2, as well as methide salts, such as LiC(SO.sub.2CF.sub.3).sub.3 and LiC(SO.sub.2CF.sub.2CF.sub.3).sub.3, may be used in these electrolytes. Fluorinated alkyl groups enhance solubility of these salts in the fluorinated solvents. In some embodiments, the electrolyte may also include a flame retardant, such as a phosphazene, and/or one or more ionic liquids.

Inventors:
; ; ; ; ;
Issue Date:
Research Org.:
A123 Systems, LLC , Waltham, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1225523
Patent Number(s):
9184468
Application Number:
13/910,105
Assignee:
A123 Systems LLC
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
SC0005117
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Jun 04
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION

Citation Formats

Tikhonov, Konstantin, Yip, Ka Ki, Lin, Tzu-Yuan, Lei, Norman, Guerrero-Zavala, Guillermo, and Kwong, Kristie W. Combinations of fluorinated solvents with imide salts or methide salts for electrolytes. United States: N. p., 2015. Web.
Tikhonov, Konstantin, Yip, Ka Ki, Lin, Tzu-Yuan, Lei, Norman, Guerrero-Zavala, Guillermo, & Kwong, Kristie W. Combinations of fluorinated solvents with imide salts or methide salts for electrolytes. United States.
Tikhonov, Konstantin, Yip, Ka Ki, Lin, Tzu-Yuan, Lei, Norman, Guerrero-Zavala, Guillermo, and Kwong, Kristie W. Tue . "Combinations of fluorinated solvents with imide salts or methide salts for electrolytes". United States. https://www.osti.gov/servlets/purl/1225523.
@article{osti_1225523,
title = {Combinations of fluorinated solvents with imide salts or methide salts for electrolytes},
author = {Tikhonov, Konstantin and Yip, Ka Ki and Lin, Tzu-Yuan and Lei, Norman and Guerrero-Zavala, Guillermo and Kwong, Kristie W},
abstractNote = {Provided are electrochemical cells and electrolytes used to build such cells. The electrolytes include imide salts and/or methide salts as well as fluorinated solvents capable of maintaining single phase solutions at between about -30.degree. C. to about 80.degree. C. The fluorinated solvents, such as fluorinated carbonates, fluorinated esters, and fluorinated esters, are less flammable than their non-fluorinated counterparts and improve safety characteristics of cells containing these solvents. The amount of fluorinated solvents in electrolytes may be between about 30% and 80% by weight not accounting weight of the salts. Linear and cyclic imide salts, such as LiN(SO.sub.2CF.sub.2CF.sub.3).sub.2, and LiN(SO.sub.2CF.sub.3).sub.2, as well as methide salts, such as LiC(SO.sub.2CF.sub.3).sub.3 and LiC(SO.sub.2CF.sub.2CF.sub.3).sub.3, may be used in these electrolytes. Fluorinated alkyl groups enhance solubility of these salts in the fluorinated solvents. In some embodiments, the electrolyte may also include a flame retardant, such as a phosphazene, and/or one or more ionic liquids.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {11}
}

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Works referenced in this record:

Nonflammable Methyl Nonafluorobutyl Ether for Electrolyte Used in Lithium Secondary Batteries
journal, January 2003


Binary Mixed Solvent Electrolytes Containing Trifluoropropylene Carbonate for Lithium Secondary Batteries
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Hydrofluoroether electrolytes for lithium-ion batteries: Reduced gas decomposition and nonflammable
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Discharge Behavior and Rate Performances of Lithium-Ion Batteries in Nonflammable Hydrofluoroethers(II)
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Nonflammable Hydrofluoroether for Lithium-Ion Batteries: Enhanced Rate Capability, Cyclability, and Low-Temperature Performance
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