Tdk Corporation

Nippon Soda Co., Ltd.

Nec Corporation

Akiji Higuchi

Atsushi Sano

Keitaro Otsuki

Takeshi Takahashi

Yosuke Miyaki

Tomohiko Kato

Nobuo Kimura

Tohru Inoue

Motoyuki Toki

Yoshitaka Fujita

Kouji Tokita

Hirokazu Tohya

Tomoya Hidaka

Kenji Yamada

Kouichi Yamaguchi

Akinobu Nojima

Kazuo Ono

Norifumi Nakamoto

Yoshiaki Wakabayashi

Hiroyuki Takeda

A method for manufacturing an active material, capable of improving the discharge capacity of a lithium ion secondary battery is provided. The method for manufacturing an active material according to the present invention includes a first step of heating a mixture solution including a lithium source, a phosphate source, a vanadium source, and water under pressure to generate a precursor in the mixture solution, and adjusting the pH of the mixture solution including the precursor to be 6 to 8; and a second step of heating the precursor at 425 to 650&#xb0; C. after the first step to generate an active material.

Active material, method for manufacturing active material, electrode, lithium ion secondary battery, and method for manufacturing lithium ion secondary battery

An active material capable of improving the discharge capacity of a lithium ion secondary battery is provided. The active material of the present invention includes LiVOPOand one or more metal elements selected from the group consisting of Al, Nb, Ag, Mg, Mn, Fe, Zr, Na, K, B, Cr, Co, Ni, Cu, Zn, Si, Be, Ti, and Mo.

Active material, method for manufacturing active material, electrode, and lithium ion secondary battery

To provide an active material from which a sufficient discharge capacity is obtained, an electrode containing the active material, a lithium secondary battery including the electrode, and a method for making an active material. A method for making an active material includes a temperature elevation step of heating a mixture containing a lithium source, a pentavalent vanadium source, a phosphoric acid source, water, and a reductant in a hermetically sealed container at a temperature elevation rate T1 from 25&#xb0; C. to 110&#xb0; C. and then at a temperature elevation rate T2 from 110&#xb0; C. to a designated temperature of 200&#xb0; C. or more, in which T1&#x3e;T2; T1=0.5 to 10&#xb0; C./min; and T2=0.1 to 2.2&#xb0; C./min.

Active material, electrode containing the active material, lithium secondary battery including the electrode, and method for making active material

An active material contains a triclinic LiVOPOcrystal particle, while the crystal particle has a spherical form and an average particle size of 20 to 200 nm.

Active material and positive electrode and lithium-ion second battery using same

A method for manufacturing an active material containing a triclinic LiVOPOcrystal particle that has a spherical form and an average particle size of 20 to 200 nm. The method includes a step of manufacturing the crystal particle by hydrothermal synthesis.

An active material capable of forming an electrochemical device excellent in its discharge capacity and rate characteristic is provided. The active material in accordance with a first aspect of the present invention comprises a compound particle containing a compound having a composition represented by the following chemical formula (1), a carbon layer covering the compound particle, and a carbon particle. The active material in accordance with a second aspect of the present invention comprises a carbon particle and a compound particle having an average primary particle size of 0.03 to 1.4 &#x3bc;m, being carried by the carbon particle, and containing a compound represented by the following chemical formula (1):LiMXO&#x2003;&#x2003;(1)where a satisfies 0.9&#x2266;a&#x2266;2, M denotes one species selected from the group consisting of Fe, Mn, Co, Ni, and VO, and X denotes one species selected from the group consisting of P, Si, S, V, and Ti.

Active material and method of manufacturing active material

The method of manufacturing an active material in accordance with the first aspect of the invention yields an active material containing LiVOPOcapable of improving the cycle characteristic of a battery. Methods of manufacturing active materials in accordance with the second, third, and fourth aspects of the present invention yield active materials containing LiVOPOcapable of improving the discharge capacity of a battery.

Active material, electrode containing same, lithium-ion secondary battery with the electrode, and method of manufacturing active material

The present invention provides a method of manufacturing an active material comprising both &#x3b1;-LiVOPOand &#x3b2;-LiVOPO. The method of manufacturing an active material in accordance with the present invention comprises a hydrothermal synthesis step of heating a mixture containing a lithium source, a phosphate source, a vanadium source, and water and having a pH greater 7 but smaller than 12.7; and a firing step of firing the mixture after being heated under pressure in the hydrothermal synthesis step.

Method of manufacturing active material, active material, electrode, and lithium-ion secondary battery

The present invention provides a method of manufacturing an active material which can form an electrochemical device excellent in discharge capacity. The method of manufacturing an active material in accordance with the present invention comprises a hydrothermal synthesis step of heating a mixture including a lithium compound, a metal compound containing one species selected from the group consisting of Fe, Mn, Co, Ni, and V, a phosphorus compound, and water within a reactor while keeping an internal pressure of the reactor at 0.3 MPa or lower by ventilating the inside of the reactor to the outside, and closing the reactor at a time when the temperature of the mixture reaches 100 to 150&#xb0; C.; and a firing step of firing the mixture after the hydrothermal synthesis step.

Method of manufacturing active material

The invention provides dispersoids having metal-oxygen groups which are suitable for the production of metal oxide thin-films at a low temperature of 200&#xb0; C. or below and for the production of homogeneous organic-inorganic hybrid materials. The invention also provides metal oxide thin-films and organic-inorganic hybrid materials endowed with various capabilities, particularly organic-inorganic hybrid materials having a high refractive index and high transparency. Use is made of a dispersoid having metal-oxygen bonds which is obtained by mixing a metal compound having at least three hydrolyzable groups with at least 0.5 mole but less than 2 moles of water per mole of the metal compound in an organic solvent, in the absence of an acid, a base and/or a dispersion stabilizer, and at a temperature at or below the temperature at which the metal compound begins to hydrolyze, then raising the temperature to at least the temperature at which hydrolysis begins.

Dispersoid having metal-oxygen bonds, metal oxide film, and monomolecular film

A dispersed ingredient having metal-oxygen bonds which is obtained by hydrolyzing a metal alkoxide in an organic solvent in the absence of an acid, a base, and/or a dispersion stabilizer, either with 0.5 to less than 1 mol of water per mol of the metal alkoxide or at &#x2212;20&#xb0; C. or lower with 1.0 to less than 2.0 mol of water per mol of the metal alkoxide. In the organic solvent, the dispersed ingredient is stably dispersed without aggregating. Use of the dispersed ingredient enables a thin metal oxide film and a homogeneous organic/inorganic composite to be produced at a temperature as low as 200&#xb0; C. or below.

Process for preparing dispersed ingredient having metal-oxygen bonds

A microstrip line element is composed of a first electrode layer () as a substrate which is more of a metal, a dielectric layer () formed by oxidizing, nitriding or oxiynitriding the first electrode layer (), a conductor layer () formed on the dielectric layer () and a second electrode layer () formed on the conductor layer (). The conductor layer () is composed of at least conductive nanoparticles () and a binder resin ().

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Kyoto, Japan

Akiji Higuchi