Patent ID: 6794036
Filing Date: 2004-09-21
Classification: C01G,C01P,H01M,Y02E,Y10T

Abstract:
An active material for a positive electrode of a non-aqueous electrolyte secondary battery comprising lithium cobaltate, LiCoO2, the lithium cobaltate comprising a mixture of primary particles of small crystals falling in the range of 0.4 to 10 &mgr;m in Feret's diameter in a projection chart by SEM observation and having an average particle size of 5 &mgr;m or less and secondary spherical or elliptically spherical particles formed of agglomerated small crystals and falling in the range of 4 to 30 &mgr;m and in addition, the molar ratio of Co to Li being between 0.97 and 1.03, and wherein at least part of the small crystals constituting the secondary particles are sintered together.