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AssigneeTosoh Corporation
InventorsTakayuki Shoji, Kazuaki Yamamoto
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A lithium-manganese complex oxide represented by a formula Li[Mn2−X−YLiXMY]O4+δ (wherein M is at least one element selected from the groups IIa, IIIb and VIII of the 3rd and 4th periods, and 0.02≦X≦0.10, 0.05≦Y≦0.30 and −0.2≦δ<0.2), having a spinel crystalline structure of 0.22° or less of half value width of the (400) plane of powder X-ray diffraction by CuKα and an average diameter of crystal grains by SEM observation of 2 μm or less, and a spinel crystalline structure lithium-manganese complex oxide having a BET specific surface area of 1.0 m2·g−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.
A lithium-manganese complex oxide having a spinel crystalline structure, which is represented by a formula Li[Mn2−X−YLiXMY]O4+δ, wherein M is at least one element selected from the groups IIa, IIIb and VIII of the 3rd and 4th periods, and 0.02≦X≦0.10, 0.05≦Y≦0.30 and −0.2≦δ≦0.2, wherein half value width of the (400) plane of powder X-ray diffraction by CuKα is 0.22° or less, and average diameter of crystal grain's by SEM observation is 2 μm or less.
An Mn—M complex oxide slurry which is obtained by adding an alkali to a metal salt;
Dependencies are inferred from the claim text.