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Positive electrode active material for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery

  • US 20040229123A1
  • Filed: 03/23/2004
  • Published: 11/18/2004
  • Est. Priority Date: 03/25/2003
  • Status: Active Grant
First Claim
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1. A positive electrode active material for a nonaqueous electrolyte secondary battery having at least a lithium-transition metal composite oxide of a layer structure, in which an existence ratio of at least one selected from the group consisting of elements which may become tetravalent and magnesium is 20% or more on a surface of the lithium-transition metal composite oxide.

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