Non-aqueous electrolyte secondary cell
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United States of America Patent
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Issued Date -
Jun 30, 2005
app pub date -
Oct 14, 2004
filing date -
Apr 18, 2002
priority date (Note) -
Abandoned
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Abstract
The present invention aims to improve cycling characteristics with maintaining high capacity, which is a feature of lithium-nickel composite oxide, and provides a non-aqueous electrolyte secondary battery comprising a positive electrode which is configured by applying on a current collector a mixture which comprises: a lithium-containing composite oxide having a hexagonal system structure, wherein Co is substituted for part of nickel in a lithium-nickel composite oxide (the substitution percentage ranges from 5 to 30%) and, in addition, at least one kind of such elements as Al, Mn, Ti, and Mg is substituted (the substitution percentage is less than 20%); a binder; and a conductive material; and said lithium-containing composite oxide is characterized in that a half width of the (110)-plane-based diffraction peak obtained from powder X-ray diffraction method, in which CuK.alpha. line is used as characteristic X-ray, is larger than 0.13.degree. and smaller than 0.20.degree., and that the ratio of the (003)-plane-based diffraction peak intensity to the (104)-plane-based diffraction peak intensity is larger than 1.2 and smaller than 1.8.
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