| abstract |
A non-aqueous electrolyte battery has a working electrode 1 having a positive electrode active material, a counter electrode 2 , and a non-aqueous electrolyte containing lithium. The positive electrode active material includes a lithium pre-doped transition metal oxide prepared by pre-doping lithium into a sodium-containing transition metal oxide having an initial charge-discharge efficiency of higher than 100% as determined by charging and discharging using a lithium metal negative electrode as a counter electrode, and the sodium-containing transition metal oxide is represented by the compositional formula Na a Li b MO 2±α , where 0.5≦a<1.0, 0<b≦0.5, 0≦α≦0.1, and M is at least one element selected from the group consisting of Ni, Co, and Mn. |