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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.
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Issue Date:
OSTI Identifier:
UChicago Argonne, LLC (Chicago, IL) CHO
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2006 Jan 24
Research Org:
UChicago Argonne, LLC, Chicago, IL (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited 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

Non-aqueous electrolyte secondary battery
patent, January 1998

Non-aqueous electrolyte secondary cell having shuttle agent
patent, June 1998

Chemical overcharge protection of lithium and lithium-ion secondary batteries
patent, January 1999

Solid polymer electrolyte electrochemical storage cell containing a redox shuttle additive for overcharge protection
patent, December 1999

Electrochemical storage cell containing a substituted anisole or di-anisole redox shuttle additive for overcharge protection and suitable for use in liquid organic and solid polymer electrolytes
patent, April 2000

Electrolyte for a rechargeable cell
patent, May 2002

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