Patent ID: 6284215
Filing Date: 2001-09-04
Classification: H01M,Y02E

Abstract:
A process for producing positive electrode active material powder for alkaline storage batteries, said powder comprising complex metal oxide particles comprising Ni as a main metal element formed of a plurality of layers piled up from the particle's center toward its surface, said process comprising continuously growing said particles to a particle diameter of 2-100 .mu.m through a plurality of successive reaction-deposition stages, and using different compositions of salts of a group of metals for forming the oxide in the reaction-deposition stages that are adjacent to each other, wherein said metals are selected from the group consisting of Ni, Co, Zn, Cd, Mn, Al, V, Cr, Fe, Cu, Ge, Nb, Mo, Ag, W, Sn, Ca, Y, Ti, Sr, rare earth metals and Bi.