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Title: Low molecular weight salts combined with fluorinated solvents for electrolytes

Abstract

Provided are electrochemical cells and electrolytes used to build such cells. An electrolyte includes at least one salt having a molecular weight less than about 250. Such salts allow forming electrolytes with higher salt concentrations and ensure high conductivity and ion transport in these electrolytes. The low molecular weight salt may have a concentration of at least about 0.5M and may be combined with one or more other salts, such as linear and cyclic imide salts and/or methide salts. The concentration of these additional salts may be less than that of the low molecular weight salt, in some embodiments, twice less. The additional salts may have a molecular weight greater than about 250. The electrolyte may also include one or more fluorinated solvents and may be capable of maintaining single phase solutions at between about -30.degree. C. to about 80.degree. C.

Inventors:
; ; ; ; ;
Issue Date:
Research Org.:
A123 Systems LLC, Waltham, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1344791
Patent Number(s):
9184467
Application Number:
13/910,098
Assignee:
A123 Systems LLC (Waltham, MA)
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:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 30 DIRECT ENERGY CONVERSION

Citation Formats

Tikhonov, Konstantin, Yip, Ka Ki, Lin, Tzu-Yuan, Lei, Norman, Guerrero-Zavala, Guillermo, and Kwong, Kristie W. Low molecular weight salts combined with fluorinated solvents for electrolytes. United States: N. p., 2015. Web.
Tikhonov, Konstantin, Yip, Ka Ki, Lin, Tzu-Yuan, Lei, Norman, Guerrero-Zavala, Guillermo, & Kwong, Kristie W. Low molecular weight salts combined with fluorinated solvents for electrolytes. United States.
Tikhonov, Konstantin, Yip, Ka Ki, Lin, Tzu-Yuan, Lei, Norman, Guerrero-Zavala, Guillermo, and Kwong, Kristie W. Tue . "Low molecular weight salts combined with fluorinated solvents for electrolytes". United States. https://www.osti.gov/servlets/purl/1344791.
@article{osti_1344791,
title = {Low molecular weight salts combined with fluorinated solvents 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. An electrolyte includes at least one salt having a molecular weight less than about 250. Such salts allow forming electrolytes with higher salt concentrations and ensure high conductivity and ion transport in these electrolytes. The low molecular weight salt may have a concentration of at least about 0.5M and may be combined with one or more other salts, such as linear and cyclic imide salts and/or methide salts. The concentration of these additional salts may be less than that of the low molecular weight salt, in some embodiments, twice less. The additional salts may have a molecular weight greater than about 250. The electrolyte may also include one or more fluorinated solvents and may be capable of maintaining single phase solutions at between about -30.degree. C. to about 80.degree. C.},
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
journal, January 2009