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Title: Non-aqueous electrolytes for electrochemical cells

Abstract

An electrolyte electrochemical device includes an anodic material and an electrolyte, the electrolyte including an organosilicon solvent, a salt, and a hybrid additiving having a first and a second compound, the hybrid additive configured to form a solid electrolyte interphase film on the anodic material upon application of a potential to the electrochemical device.

Inventors:
; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1257252
Patent Number(s):
9,368,832
Application Number:
13/552,219
Assignee:
UCHICAGO ARGONNE, LLC (Chicago, IL) ANL
DOE Contract Number:
AC02-06CH11357
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Jul 18
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE

Citation Formats

Zhang, Zhengcheng, Dong, Jian, and Amine, Khalil. Non-aqueous electrolytes for electrochemical cells. United States: N. p., 2016. Web.
Zhang, Zhengcheng, Dong, Jian, & Amine, Khalil. Non-aqueous electrolytes for electrochemical cells. United States.
Zhang, Zhengcheng, Dong, Jian, and Amine, Khalil. 2016. "Non-aqueous electrolytes for electrochemical cells". United States. doi:. https://www.osti.gov/servlets/purl/1257252.
@article{osti_1257252,
title = {Non-aqueous electrolytes for electrochemical cells},
author = {Zhang, Zhengcheng and Dong, Jian and Amine, Khalil},
abstractNote = {An electrolyte electrochemical device includes an anodic material and an electrolyte, the electrolyte including an organosilicon solvent, a salt, and a hybrid additiving having a first and a second compound, the hybrid additive configured to form a solid electrolyte interphase film on the anodic material upon application of a potential to the electrochemical device.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 6
}

Patent:

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  • A electrolyte for a lithium battery includes a silane/siloxane compound represented by SiR.sub.4-x-yR'.sub.xR''.sub.y, by Formula II, or Formula III: ##STR00001## where each R is individually an alkenyl, alkynyl, alk(poly)enyl, alk(poly)ynyl, aryl; each R' is represented by; ##STR00002## each R'' is represented by Formula I-B; ##STR00003## R.sup.1 is an organic spacer; R.sup.2 is a bond or an organic spacer; R.sup.3 is alkyl or aryl; k is 1-15; m is 1-15; n is 1 or 2; p is 1-3; x' is 1-2; and y' is 0-2.
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  • Provided are electrochemical cells and electrolytes used to build such cells. The electrolytes include ion-supplying salts and fluorinated solvents capable of maintaining single phase solutions with the salts 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 increase 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. Fluorinated salts, such as fluoroalkyl-substituted LiPF.sub.6, fluoroalkyl-substituted LiBF.sub.4 salts, linear and cyclic imidemore » salts as well as methide salts including fluorinated alkyl groups, may be used due to their solubility in the fluorinated solvents. In some embodiments, the electrolyte may also include a flame retardant, such as a phosphazene or, more specifically, a cyclic phosphazene and/or one or more ionic liquids.« less
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