CPC H01M 4/628 (2013.01) [H01M 4/483 (2013.01); H01M 4/523 (2013.01); H01M 10/0562 (2013.01); H01M 2300/0071 (2013.01)] | 12 Claims |
1. A secondary battery comprising:
a solid electrolyte layer containing a tantalum oxide as a solid electrolyte;
a positive-electrode active material layer disposed on an upper surface of the solid electrolyte layer, the positive-electrode active material layer containing nickel hydroxide (Ni(OH)2) as a positive-electrode active material;
a negative-electrode active material layer disposed on a lower surface of the solid electrolyte layer so as to be opposite to the positive-electrode active material layer, the negative-electrode active material layer containing a titanium oxide or containing a titanium oxide and a silicon oxide as a negative-electrode active material; and
a buffer layer for improving an interface formed between the positive-electrode active material layer and the solid electrolyte layer or between the negative-electrode active material layer and the solid electrolyte layer, wherein the buffer layer contains a metal oxide selected from the group consisting of a tin oxide (SnO), aluminum oxide (Al2O3), zirconia (ZrO2), and magnesium oxide (MgO);
wherein the titanium oxide comprises a micro crystalline structure.
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