Toyota Jidosha Kabushiki Kaisha

Hideki Oki

Takeshi Tojigamori

Toshihiro Seguchi

A battery active material includes a crystal phase that is represented by a formula YScTiOS(where 0&#x3c;x&#x3c;2), and has a Ruddlesden-Popper structure.

Battery active material comprising a crystal phase having a Ruddlesden-Popper structure and battery including the same

An active material for a battery, which has high thermal stability and low electric potential. According to the invention, an active material for a battery including an M element in Group III, a Ti element, an O element, and an S element and having an MTiOScrystalline phase is provided to solve the problem.

Active material for battery, and battery

The main object of the present invention is to provide a method for producing a cathode active material layer, which allows a high-purity lithium complex oxide by restraining impurities from being produced, allows a flat film, and allows orientation control. The present invention solves the above-mentioned problems by providing a method for producing a cathode active material layer, in which a cathode active material layer is formed on a substrate and contains LiXO(X is a transition metal element of at least one kind selected from the group consisting of Co, Ni and Mn, a=0.7-1.3, and b=1.5-2.5), characterized in that the method comprises the steps of: forming a cathode active material precursor-film on the above-mentioned substrate by a physical vapor deposition method while setting a temperature of the substrate at 300&#xb0; C. or less, and performing an annealing treatment for the cathode active material precursor-film at a temperature of a crystallizable temperature of the LiXOor more, and characterized in that the substrate has orientation property in a surface.

Method for producing cathode active material layer

An active material for a battery contains a YTiOScrystalline phase, and has an I/Ivalue of 0.3 or smaller and an I/Ivalue of 0.15 or smaller, wherein I, Iand Iare the peak intensity of the YTiOScrystalline phase at 2&#x3b8;=34.5&#xb0;, the peak intensity of a YTOcrystalline phase at 2&#x3b8;35.6&#xb0;, and the peak intensity of TiSat 2&#x3b8;=34.1&#xb0;, respectively, that are measured by X-ray diffraction using CuK&#x3b1; radiation. The active material is synthesized by preparing a raw material composition containing TiS, TiOand YOand having a molar ratio of TiSto YOof higher than 1 or containing TiS, TiOand YOand having a molar ratio of TiOto YOof lower than 1, and heating the raw material composition. A positive or negative-electrode active material layer included in the battery may be contain the active material.

Active material for battery, battery, and method for production of active material for battery

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.

Growing community of inventors

Susono, Japan

Hideki Oki