Lithium-manganese complex oxide, production method thereof and use thereof
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United States of America Patent
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Nov 9, 2004
Grant Date -
Oct 31, 2002
app pub date -
Feb 15, 2002
filing date -
Feb 16, 2001
priority date (Note) -
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Abstract
A lithium-manganese complex oxide represented by a formula Li[Mn.sub.2-X-Y Li.sub.X M.sub.Y ]O.sub.4+.delta. (wherein M is at least one element selected from the groups IIa, IIIb and VIII of the 3rd and 4th periods, and 0.02.ltoreq.X.ltoreq.0.10, 0.05.ltoreq.Y.ltoreq.0.30 and -0.2.ltoreq..delta.<0.2), having a spinel crystalline structure of 0.22.degree. or less of half value width of the (400) plane of powder X-ray diffraction by CuK.alpha. and an average diameter of crystal grains by SEM observation of 2 .mu.m or less, and a spinel crystalline structure lithium-manganese complex oxide having a BET specific surface area of 1.0 m.sup.2.multidot.g.sup.-1 or less; production methods thereof; and a lithium secondary battery which uses the lithium-manganese complex oxide as the positive electrode active material are described.
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