Patent ID: 8790831
Filing Date: 2014-07-29
Classification: H01M,Y02E,Y10T

Abstract:
1. A powder for positive electrode active material, the powder consisting of Mn-containing particles, wherein in the cumulative particle size distribution on the volume basis of particles constituting the powder, D50, which is the average particle diameter at a 50% cumulation measured from the smallest particle, is in the range of from 0.1 μm to 10 μm, and wherein 90% by volume or more of the particles constituting the powder are in the range of from 0.3 times to 3 times D50, and the powder is a raw material to obtain a positive electrode active material by calcination, and is composed of a carbonate, a hydroxide or a mixture thereof; and wherein the Mn-containing particles are approximately spherical particles.