Lithium secondary battery

Details Lithium secondary battery Lithium secondary battery

H - Electricity

01

M

H01M 4/50 (2006.01) H01M 4/48 (2006.01) H01M 4/58 (2006.01) H01M 10/36 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2459225

A lithium secondary battery superior in the suppression of increasing internal resistance ratio and discharge capacity maintenance ratio and being simple in structure and inexpensive. A lithium secondary battery comprises a positive active material comprising a lithium aluminum manganese oxide having a spinel structure and an aluminum compound other than the lithium aluminum manganese oxide. A ratio of an amount of aluminum contained in the aluminum compound to a total amount of aluminum contained in the positive active material is within a range of 1% by weight or more to 50% by weight or less. The lithium aluminum manganese oxide is represented by a general formula L11+x Al y Mn 2-x-y O4 wherein x and y denote constituting ratios of elements in one molecule, x >= 0, y >= 0.01, and has a lattice constant of 8.245 .ANG. or less. A part of Mn may be replaced with an element other than Li and Al.

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