Patent ID: 9214676
Filing Date: 2015-12-15
Classification: C01G,C01P,H01M,Y02E

Abstract:
1. A positive electrode active material for lithium ion batteries, represented by the following composition formula: wherein M represents one or more selected from the group consisting of scandium (Sc), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), bismuth (Bi), tin (Sn), magnesium (Mg), calcium (Ca), boron (B) and zirconium (Zr); 0≦x≦0.1; 0<y≦0.7; and α>0, wherein the particle size of primary particles is 1.6 to 2.3 μm, the alkali amount at the particle surfaces measured by two-stage neutralization titration is 1.2% by mass or less, and when the amount of lithium hydroxide in the alkali amount at the particle surfaces is designated as A % by mass, and the amount of lithium carbonate is designated as B % by mass, the ratio A/B is 1 or less.