Because of the composition represented by General Formula: Li1+x+αNi(1−x−y+δ)/2Mn(1−x−y−δ)/2MyO2 (where 0≦x≦0.05, −0.05≦x+α≦0.05, 0≦y≦0.4; −0.1≦δ≦0.1 (when 0≦y≦0.2) or −0.24≦δ≦0.24 (when 0.2≦y≦0.4); and M is at least one element selected from the group...http://www.google.ca/patents/US7351500?utm_source=gb-gplus-sharePatent US7351500 - Lithium-containing composite oxide and nonaqueous secondary cell using the same, and method for manufacturing the same
