Lithium secondary battery
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United States of America Patent
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Nov 15, 2005
Issued Date -
N/A
app pub date -
Jan 17, 2002
filing date -
Jul 30, 1999
priority date (Note) -
Expired
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Abstract
A lithium secondary battery using lithium manganese oxide as a positive active material and having excellent charge and discharge cycle properties. As a positive active material of a lithium secondary battery, lithium manganese oxide having a cubic spinel structure, in which the strength ratio (P2/P1 strength ratio) of the primary endothermal peak (P1) appearing around 950° C. and the secondary endothermal peak (P2) appearing around 1100°0 C. in differential thermal analysis is under 1, is used.
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