Nonaqueous electrolyte secondary battery
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United States of America Patent
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Aug 20, 2002
Grant Date -
N/A
app pub date -
Apr 21, 2000
filing date -
Apr 26, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A nonaqueous electrolyte secondary battery uses a lithium manganese composite oxide as its positive electrode active material, and is improved in cycle life at a high temperature, and also improved in capacity retention properties. A negative electrode active material of the battery is capable of doping and undoping a lithium ion. The buttery contains in its inside at least one of: an oxide of at least one element selected from the group consisting of La, Sr, Nd, and Sm; a carbonate of at least one element selected from the group consisting of La, Sr, Nd, and Sm; and, a composite oxide of manganese combined with at least one element selected from the group consisting of La, Sr, Nd, and Sm. The battery uses an electrolyte, the electrolyte containing LiPF.sub.6 or LiBF.sub.4 as its supporting salt.
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