Toyota Jidosha Kabushiki Kaisha

Takeshi Usami

Jun Yoshida

Yohei Shindo

Shinya Shiotani

Masaru Kubota

Hiroyuki Inoue

Kazuomi Yamanishi

Yuji Adachi

A solid-state battery having a low heat generation amount and low resistance, and a method for producing the same. The solid-state battery is a solid-state battery comprising: a cathode comprising a cathode layer that contains an oxide-based cathode active material, an anode comprising an anode layer that contains an anode active material, and a solid electrolyte layer being disposed between the cathode layer and the anode layer and containing a solid electrolyte, wherein at least any one of the cathode layer and the solid electrolyte layer contains a sulfide-based solid electrolyte, and wherein the sulfide-based solid electrolyte comprises a high oxygen concentration layer on a contact surface with the oxide-based cathode active material, the high oxygen concentration layer having a higher oxygen element concentration than other parts except the contact surface.

Solid-state battery and method for producing the same

A method of producing a carburizing forging material includes heating a steel material at 1300&#xb0; C. or higher, forming Nb in a solid solution state and then rolling the steel material, heating the rolled steel material in a range of 950 to 1050&#xb0; C., hot forging the heated steel material in a range of 950 to 1040&#xb0; C., precipitating a Nb carbonitride in the steel material by cooling the steel material or maintaining a temperature of the steel material under a condition in which a time spent in a range of 950 to 970&#xb0; C. is 1 minute or longer, precipitating a ferrite phase in the steel material by cooling the steel material or maintaining a temperature of the steel material under a condition in which a time spent in a range of 730 to 870&#xb0; C. is 10 minutes or longer, and cooling the steel material to room temperature.

Method of producing carburizing forging steel material

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Tokai, Japan

Takeshi Usami