Cathode compositions for lithium-ion batteries

  • US 7,078,128 B2
  • Filed: 02/07/2005
  • Issued: 07/18/2006
  • Est. Priority Date: 04/27/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A cathode composition for a lithium-ion battery in which the cathode composition has the formula Li[Li(1-2y)/3M2yMn(2-y)/3]O2,where 0.083<

  • y<

    0.5 and M2 represents one or more metal elements, with the proviso that M2 is a metal element other than chromium,said composition characterized as being in the form of a single phase having an O3 crystal structure that does not undergo a phase transformation to a spinel crystal structure when incorporated in a lithium-ion battery and cycled for 100 full charge-discharge cycles at 30°

    C. and a final capacity of 130 mAh/g using a discharge current of 30 mA/g.

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