Positive electrode for non-aqueous electrolyte cell and manufacturing method of the same
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United States of America Patent
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Mar 18, 2003
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N/A
app pub date -
Jan 25, 2000
filing date -
Jan 25, 1999
priority date (Note) -
Expired
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Abstract
A positive electrode for a non-aqueous electrolyte cell containing spinel-type lithium manganese oxide as a main active material, wherein the positive electrode is comprised of a mixture of spinel-type lithium manganese oxide represented by a formula Li.sub.1+x Mn.sub.2-Y O.sub.4 (provided that the atomic ratio of lithium and manganese is determined to be 0.56.ltoreq.Li/Mn [=(1+X)/(2-Y)].ltoreq.0.62, X is determined to be-0.2.ltoreq.X.ltoreq.0.2, and Y is determined to be Y.ltoreq.1.0) and at least either one of lithium cobalt oxide represented by a formula Li.sub.1+Z CoO.sub.2 (provided that Z is determined to be-0.5.ltoreq.Z.ltoreq.0.5) or lithium nickel oxide represented by a formula Li.sub.1+Z NiO.sub.2 (provided that Z is determined to be-0.5.ltoreq.Z .ltoreq.0.5), and wherein in the case that the weight of spinel-type manganese oxide is defined as A and that the weight of the lithium cobalt oxide or lithium nickel oxide is defined as B, the amount of lithium cobalt oxide or lithium nickel oxide is determined to be 0.5.ltoreq.B/(A+B)<0.2.
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