| abstract |
The invention provides a kind of lithium secondary battery possessing positive active material in positive pole, it is characterized in that, described positive active material comprises the complex Li-Mn-oxide that general formula (1) represents, Lin x (Mnn a con b nin c )n 2-x-y mn y on 2 (1), a, b, c in formula (1) are 0 < a < 0.65,0≤b, 0≤c, x, y in formula (1) are 0 < x < 1.3,0 < y < 0.05, element M in described formula (1) is compared with Mn, Co, Ni, the element large with the combination energy of oxygen. |