Nonaqueous secondary battery
AssigneeSanyo Electric Co., Ltd.
InventorsNaoya Nakanishi, Kouichi Satoh, Kazuyasu Fujiwara, Toshiyuki Nohma, Ikuo Yonezu
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Abstract
In the nonaqueous secondary battery of this invention, a positive electrode includes, as an active material, a composite oxide represented by a composition formula, LixMn2−y−zNiyMzOq, wherein M is at least one element selected from the group consisting of B, Mg, Al, Ti, V, Fe, Co, Cu, Zn, Ga, Y, Zr, Nb, Mo and In; 1.20≦x≦1.80; y≧0.10; z≧0; y+z≦1.90; and 3.70≦q≦4.30, in a discharge state during fabrication of the nonaqueous secondary battery. As a result, the nonaqueous secondary battery can exhibit good charge-discharge cycle performance and can be fabricated at low cost.
Claims5
A nonaqueous secondary battery requiring charge before initial discharge comprising a positive electrode, a negative electrode and a nonaqueous electrolyte,
- the positive electrode including, as an active material, a composite oxide represented by a composition formula, LixMn2−y−zNiyMzOq, wherein M is at least one element selected from the group consisting of B, Mg, Al, Ti, V, Fe, Co, Cu, Zn, Ga, Y, Zr, Nb, Mo and In;
- 1.20≦x≦1.80;
- 0.10≦y≦1.50;
- z>0;
- y+z≦1.90;
- and 3.70≦q≦4.30, in a discharge state during fabrication of the nonaqueous secondary battery.
Dependencies are inferred from the claim text.