Toyota Jidosha Kabushiki Kaisha

Kyoto University

Hitachi Zosen Corporation

Heidy Hodex Visbal Mendoza

Naoki Osada

Susumu Hikazudani

Kazuyuki Hirao

Toshimi Fukui

Junko Nakamoto

Atsushi Wakui

The all-solid-state battery includes a positive electrode layer, a separator layer, and a negative electrode layer. The separator layer includes a sulfide solid electrolyte. In a cross section parallel to the thickness direction of the separator layer, a line analysis is performed by SEM-EDX to measure an atom concentration of sulfur and an atom concentration of iodine on a straight line extending from the negative electrode layer to the positive electrode layer in parallel to the thickness direction. A regression line is derived from the results of the line analysis, and the regression line has a slope of 0.019 to 0.036. The independent variable of the regression line is a position in the thickness direction of the separator layer. The dependent variable of the regression line is a ratio of the atom concentration of iodine to the atom concentration of sulfur.

All-solid-state battery

The present invention provides a hydrogen production process, which is capable of producing hydrogen, which is a clean source of energy, simply and conveniently without using conventionally-used ammonia, with an extremely high level of safety. In accordance with the present invention, hydrogen is produced by substituting hydrogen for free oxygen in mayenite (CaAlOO) to obtain hydrogen-substituted mayenite (CaAlOH) and reacting the resultant hydrogen-substituted mayenite (CaAlOH) with water to produce hydrogen, and hydrogen is produced by substituting hydrogen for free oxygen in mayenite (CaAlOO) to obtain hydrogen-substituted mayenite (CaAlOH), irradiating the resultant hydrogen-substituted mayenite (CaAlOH) with ultraviolet rays to obtain conductive mayenite (CaAlOe), and reacting the resultant conductive mayenite (CaAlOe) with water to produce hydrogen.

Hydrogen production process

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Toyota, Japan

Heidy Hodex Visbal Mendoza