Positive electrode active material containing a lithium-containing composite metal oxide and nonaqueous electrolyte secondary battery

摘要

A positive electrode active material and a nonaqueous electrolyte secondary battery containing a lithium-containing composite metal oxide having a composition represented by: Li1+yM1-y-zM1zPO4 where M is at least one of Co and Ni, and M1 is at least one of Mg, Zr and Al, the molar ration y is larger than 0 and smaller than 0.5, and the molar ration z is larger than 0 and not larger than 0.5 is provided.