Patent ID: 7883644

Claim:
A LiCoO 2 -containing powder comprising: a lithium cobalt oxide; and a lithium buffer material, wherein the lithium buffer material is a material of the Formula Li z MO 2 , wherein z is between 0.95 and 1.1; M is Ni 1−x−y Mn x Co y ; y is an amount of up to 0.5; and a ratio of (x/(1−x−y)) is in a range of 0.4 to 1.1, and wherein the lithium cobalt oxide and the lithium buffer material are in equilibrium with respect to a lithium chemical potential therebetween, and wherein the LiCoO 2 -containing powder is formed in a core-shell structure in which a core comprises the lithium cobalt oxide and a shell comprises the lithium buffer material.