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

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:
OSTI Identifier:
1344791
Assignee:
A123 Systems LLC (Waltham, MA) CHO
Patent Number(s):
9,184,467
Application Number:
13/910,098
Contract Number:
SC0005117
Resource Relation:
Patent File Date: 2013 Jun 04
Research Org:
A123 Systems LLC, Waltham, MA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 30 DIRECT ENERGY CONVERSION

Other works cited in this record:

Hydrofluoroether electrolytes for lithium-ion batteries: Reduced gas decomposition and nonflammable
journal, October 2011

Nonflammable Hydrofluoroether for Lithium-Ion Batteries: Enhanced Rate Capability, Cyclability, and Low-Temperature Performance
journal, January 2009
  • Naoi, Katsuhiko; Iwama, Etsuro; Ogihara, Nobuhiro
  • Journal of The Electrochemical Society, Vol. 156, Issue 4, p. A272-A276
  • DOI: 10.1149/1.3073552

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