Tdk Corporation

Yosuke Miyaki

Atsushi Sano

Takeshi Takahashi

Keitaro Otsuki

Akiji Higuchi

Kazuo Katai

Hidetake Itoh

Hiroaki Hasegawa

Tohru Inoue

Yoshihiko Ohashi

Hideki Tanaka

Kiyonori Hinoki

Akio Yamanaka

In an electrochemical device having an element main bodyA enclosed in an exterior packageB, a peripheral region of the exterior packageB is provided with an elastic structure or a plurality of elastic structures R, Rhaving an elastic force in a thickness direction (Z-axis direction) of films. Each of the elastic structures R, Rhas a first region of the exterior packageB folded along a film outer edge, and a second region of the exterior packageB opposed to the first region. Two ends R, R(R, R) of the first region in a direction along the film outer edge are in contact with the second region, and between the two ends R, R(R, R) there is a space (with a maximum height 2R) between the first region and the second region.

Electrochemical device

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

A leadof an electrochemical device includes a lead bodyA containing Al, and a bent metallic thin filmprovided to a tip part of the lead bodyA. The metallic thin filmincludes a thin film bodycontaining Ni, and a plating layercontaining Sn and covering at least an outer surface of the bent thin film body. A specific area of an inner surface of the bent thin film bodyand a surface of the lead bodyA are welded in a predetermined area without the plating layerbeing disposed there between.

Electrochemical device and manufacturing method thereof, circuit board and housing tray

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

An electrode for an electrochemical capacitor includes a sheet-like current collector and a polarizable electrode layer. The polarizable electrode layer is provided on the current collector with a predetermined bare portion left. The polarizable electrode layer has undergone an embossment work and at least part of the bare portion of the current collector has not undergone any embossment work.

Growing community of inventors

Tokyo, Japan

Yosuke Miyaki