| abstract |
The solid solution lithium-containing transition metal oxide of the present invention, Li 1.5 [Ni a Co b Mn c [Li] d ] O 3 Containing transition metal oxide represented by the following formula In the above formula, the relation of 0 <a <1.4, 0 b 1.4, 0 <c <1.4, 0.1 <d? 0.4, a + b + c + d = 1.5, 1.1? A + b + c <1.4 is satisfied. The lithium-containing transition metal oxide has a site which changes into a spinel structure by performing charging or charging / discharging in a layered structure portion and a predetermined potential range. The spinel structure change ratio of the lithium-containing transition metal oxide is 0.25 or less when the ratio of the spinel structure change when the layered Li 2 MnO 3 is changed to the spinel structure LiMn 2 O 4 is 1, Or more. |