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Title: Long life lithium batteries with stabilized electrodes

The present invention relates to non-aqueous electrolytes having electrode stabilizing additives, stabilized electrodes, and electrochemical devices containing the same. Thus the present invention provides electrolytes containing an alkali metal salt, a polar aprotic solvent, and an electrode stabilizing additive. In certain electrolytes, the alkali metal salt is a bis(chelato)borate and the additives include substituted or unsubstituted linear, branched or cyclic hydrocarbons comprising at least one oxygen atom and at least one aryl, alkenyl or alkynyl group. In other electrolytes, the additives include a substituted aryl compound or a substituted or unsubstituted heteroaryl compound wherein the additive comprises at least one oxygen atom. There are also provided methods of making the electrolytes and batteries employing the electrolytes. The invention also provides for electrode materials. Cathodes of the present invention may be further stabilized by surface coating the particles of the spinel or olivine with a material that can neutralize acid or otherwise lessen or prevent leaching of the manganese or iron ions. In some embodiments the coating is polymeric and in other embodiments the coating is a metal oxide such as ZrO.sub.2, TiO.sub.2, ZnO, WO.sub.3, Al.sub.2O.sub.3, MgO, SiO.sub.2, SnO.sub.2 AlPO.sub.4, Al(OH).sub.3, a mixture of any two or more thereof.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1178256
Assignee:
UChicago Argonne, LLC (Chicago, IL) CHO
Patent Number(s):
9,012,096
Application Number:
11/338,902
Contract Number:
W-31-109-ENG-38
Resource Relation:
Patent File Date: 2006 Jan 24
Research Org:
UChicago Argonne, LLC, Chicago, IL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Works referenced in this record:

Storage and cycling performance of Cr-modified spinel at elevated temperatures
journal, October 2001

Electroactivity of natural and synthetic triphylite
journal, July 2001

Rechargeable cathodes based on Li2CrxMn2−xO4
journal, April 1995

Lithium Bis(oxalato)borate Stabilizes Graphite Anode in Propylene Carbonate
journal, September 2002
  • Xu, Kang; Zhang, Shengshui; Poese, Bruce A.
  • Electrochemical and Solid-State Letters, Vol. 5, Issue 11, p. A259-A262
  • DOI: 10.1149/1.1510322

Electronically conductive phospho-olivines as lithium storage electrodes
journal, September 2002
  • Chung, Sung-Yoon; Bloking, Jason T.; Chiang, Yet-Ming
  • Nature Materials, Vol. 1, Issue 2, p. 123-128
  • DOI: 10.1038/nmat732

Phospho-olivines as Positive-Electrode Materials for Rechargeable Lithium Batteries
journal, April 1997
  • Padhi, A. K.
  • Journal of The Electrochemical Society, Vol. 144, Issue 4, p. 1188-1194
  • DOI: 10.1149/1.1837571