Toyota Jidosha Kabushiki Kaisha

Toshihiro Seguchi

Hideki Oki

Yasushi Tsuchida

A composite positive electrode active material includes: a positive electrode active material which includes a transition metal; and a reaction suppressor which is formed so as to cover a surface of the positive electrode active material, and which is made of a polyanion structure-containing compound having a cation moiety composed of a metal atom that becomes a conducting ion and having a polyanion structural moiety composed of a center atom that is covalently bonded to a plurality of oxygen atoms. A transition metal-reducing layer which has self-assembled on the surface of the positive electrode active material in contact with the reaction suppressor owing to reaction of the transition metal with the polyanion structure-containing compound, has a thickness of 10 nm or less.

Composite positive electrode active material, all solid-state battery, and methods for manufacture thereof

Provided is a method of producing a nitrided lithium-transition metal compound oxide having a rock-salt layer structure or a spinel structure, including: preparing a raw material composite that has a raw material containing lithium, transition metal, and oxygen and a nitriding agent that is expressed by a following General Formula (1) and is solid or liquid at room temperature (25&#xb0; C.); and synthesizing the nitrided lithium-transition metal compound oxide by firing the raw material composite to nitride the raw material. R, R, and Rare independent of each other and are each a functional group having at least one of carbon (C), hydrogen (H), oxygen (O), and nitrogen (N).

Method of producing nitrided lithium-transition metal compound oxide, nitrided lithium-transition metal compound oxide, and lithium-ion battery

An electrode active material including a lithium-transition metal complex oxide having a layered rock salt structure or spinel structure and a fluorine and nitrogen introduced therein. Also disclosed is an electrode active material production method including a nitrogen introduction step of synthesizing a lithium-transition metal complex oxide (c) having a layered rock salt structure or spinel structure and a fluorine and nitrogen introduced therein, by firing a material composition including a lithium-transition metal complex oxide (a) having a fluorine introduced therein and a nitriding agent (b) being represented by the formula (1) and being solid or liquid at ordinary temperature.

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Susono, Japan

Toshihiro Seguchi