Taiyo Yuden Co., Ltd.

Takato Sato

Daigo Ito

Chie Kawamura

Sachie Tomizawa

Masashi Sekiguchi

An all solid battery includes a solid electrolyte layer, a positive electrode layer that includes a positive electrode active material and a negative electrode active material, and a negative electrode layer that includes a positive electrode active material and a negative electrode active material, wherein a relationship 'S>S' is satisfied, when a ratio of the positive electrode active material of the positive electrode layer is a ratio A, a ratio of the negative electrode active material of the positive electrode layer is a ratio B, a ratio of the positive electrode active material of the negative electrode layer is a ratio A, a ratio of the negative electrode active material of the negative electrode layer is a ratio B, Sis A/(A+B), and Sis A/(A+B).

All solid battery

An all solid battery includes a solid electrolyte layer of which a main component is a Li&#x2014;Al-M-PO-based phosphoric acid salt, a first electrode layer that is provided on a first main face of the solid electrolyte layer and includes an active material, and a second electrode layer that is provided on a second main face of the solid electrolyte layer and includes an active material. 'M' is at least one of Ge, Ti, and Zr. A region in which a ratio of MOwith respect to Li&#x2014;Al-M-POis 5% or more is unevenly distributed from a center in a thickness of the solid electrolyte layer to 0.4 A downward and to 0.4 A upward, when the thickness of the solid electrolyte layer is expressed by 'A'.

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Tokyo, Japan

Takato Sato