Toto Ltd.

Akira Ishiguro

Akira Kawakami

Shigeru Ando

Yutaka Momiyama

Takuya Matsuo

Yousuke Akagi

Yasuo Kakinuma

Koji Omoshiki

Yuya Takahashi

Megumi Shimazu

Chihiro Kobayashi

Hiroshi Niimi

Disclosed is a durable solid oxide fuel cell that is less likely to have a problem of a conventional solid oxide fuel cell that an air electrode containing a peroviskite oxide, when exposed to a reducing atmosphere, is separated at the stop of operation, especially shutdown. The solid oxide fuel cell includes an air electrode that is obtained by firing a compact containing a perovskite oxide and sulfur element. The content of the sulfur element in the air electrode as fresh after firing or before the start of power generation is in the range of 50 ppm to 3,000 ppm. The separation of the air electrode is effectively suppressed at the shutdown operation.

Solid oxide fuel cell

A solid oxide fuel cell scatters MgO over a grain boundary of an LSGM which is a solid electrolyte layer. Ni components that diffuse from a fuel electrode formed on the other side of an LDC from the LSGM are trapped by the scattered MgO particles and are suppressed from diffusing towards an air electrode in the electrolyte layer.

Growing community of inventors

Kanagawa-ken, Japan

Akira Ishiguro