Patent ID: 8785042

Claim:
A powderous lithium transition metal oxide comprising a first phase consisting of Mn and Ni bearing LiCoO 2 particles, said particles having a plurality of discrete and detached Mn and Ni enriched islands partially covering surfaces thereof, wherein said islands have a Mn and Ni concentration that is higher than in the bulk of said particles and said islands comprise at least 5 mol % of Mn; and a second island-free phase having a generalized formula of Li 1+a M′ 1−a O 2±b , with −0.03<a<0.05 and b<0.02, M′=Ni m Mn n Co 1−m−n , with m≧n, and 0.1<m+n<0.9; wherein the first phase originates from a reaction of LiCoO 2 particles and the second island-free phase.