Tdk Corporation

Hiroko Takayanagi

Hiroshi Sato

Masahiro Oishi

Gakuho Isomichi

Hisaji Oyake

An electrochemical device has a laminated body including: a positive electrode; a negative electrode; and a solid electrolyte sandwiched between the positive electrode and the negative electrode, wherein the laminated body contains water, a content of the water contained in the laminated body is 0.001 mass % or more and less than 0.3 mass % with respect to the laminated body, a part of the water is a bound water bonding with a constituent of the laminated body, and a ratio of the bound water in the water is 50% or more and 90% or less.

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Tokyo, Japan

Hiroko Takayanagi