| abstract |
A positive electrode active material is Li 1.5 [Ni a Co b Mn c Li d ] O 3 where a, b, c and d satisfy the relationships 0.2 a 0.7, 0.1 a 0.4, a + b + c + 1.5, 1.1? A + b + c? 1.35, and 0 <b / a <1), and Li 1.0 Ni a ' Co b' Mn c ' O 2 (a ', b' and c 'satisfy a relation of a' + b '+ c' = 1.0). |