Manufacturing method of spinel lithium manganese oxide for lithium secondary cell
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United States of America Patent
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Nov 5, 2002
Grant Date -
Nov 29, 2001
app pub date -
Mar 15, 2001
filing date -
Apr 21, 2000
priority date (Note) -
Expired
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Abstract
A manufacturing method of spinel type manganese oxide for a lithium ion secondary cell, includes pre-firing a mixture of lithium salt including lithium carbonate, manganese oxide, and heterogeneous metal, firing the mixture at 900 to 1200.degree. C. to form a raw material, adding in the raw material at least one of crystal growth accelerators selected from the group consisting of lithium hydroxide, lithium sulfide and a mixture thereof, and firing the resulting compound at 750 to 850.degree. C. to form an excess lithium heterogeneous metal-doped spinel compound having a BET specific surface area of 0.5 m.sup.2 /g or less.
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