Hitachi Maxell, Limited

Maxell Holdings, Ltd.

Tsubakimoto Chain Company

Maxell, Ltd.

Hitachi Maxwell, Ltd.

Microconnect Corp.

Nobuaki Matsumoto

Hideaki Katayama

Toshihiro Abe

Yoshinori Sato

Kazuhiro Tsutsumi

Hiroshi Abe

Yukio Ueyama

Hisao Nishii

Shigeo Aoyama

Fusaji Kita

Hiroyuki Taike

Hisao Kanzaki

Jun Ohshimo

Yasutaka Kuroki

Tomoyoshi Okamoto

An electrochemical device of the present invention includes a positive electrode, a negative electrode, a non-aqueous electrolyte, and a separator. The separator includes a first porous layer composed mainly of a thermoplastic resin and a second porous layer composed mainly of insulating particles with a heat-resistant temperature of 150° C. or higher. The first porous layer is disposed to face the negative electrode.

Electrochemical device comprising separator with laminated porous layers

An electrochemical device having excellent safety at high temperature is provided by using a separator for an electrochemical device, which is made of a porous film comprising: a porous base () having a heat-resistant temperature of 150&#xb0; C. or higher and including filler particles (); at least one kind of shutdown resin () selected from the group consisting of resin A that has a melting point in a range of 80&#xb0; C. to 130&#xb0; C. and resin B that absorbs an electrolyte and swells due to heating, and the swelling degree is increased as the temperature rises; and a binder ().

Separator for electrochemical device, and electrochemical device

An electrochemical device of the present invention includes a positive electrode, a negative electrode, a non-aqueous electrolyte, and a separator. The separator includes a first porous layer composed mainly of a thermoplastic resin and a second porous layer composed mainly of insulating particles with a heat-resistant temperature of 150&#xb0; C. or higher. The first porous layer is disposed to face the negative electrode.

A slurry for forming an insulating layer of the present invention includes heat-resistant insulating fine particles, a thickening agent, and a dispersion medium. The insulating fine particles are dispersed in the dispersion medium. The slurry for forming an insulating layer has a viscosity of 5 to 500 mPa&#xb7;s. The proportion of particles with a particle size of 1 &#x3bc;m or less in the insulating fine particles is 30 vol % or more and the proportion of particles with a particles size of 3 &#x3bc;m or more in the insulating fine particles is 10 vol % or less. An electrochemical device of the present invention includes a separator for an electrochemical device of the present invention that is produced using the slurry for forming an electrochemical device of the present invention.

Slurry for forming insulating layer, separator for electrochemical device, method for producing the same, and electrochemical device

Method for producing electrochemical device

A nonaqueous battery having a high level of safety and high-temperature storability, a heat-resistant porous film capable of serving as a separator material for separating positive and negative electrodes from each other and capable of forming the nonaqueous battery, and a separator capable of forming the nonaqueous battery are provided.

Heat-resistant porous film, separator for nonaqueous battery, and nonaqueous battery

The present invention provides a lithium secondary battery using a separator including a porous film formed by binding inorganic oxide particles together with a binder. The inorganic oxide particles are treated so that an amount of alkali metal elements eluted therefrom when they are immersed in ion exchange water is reduced to 1000 ppm or less. As a result, it is possible to provide a lithium secondary battery with a high degree of reliability, whose characteristics deteriorate less when it is used or stored for an extended period.

Porous film for separator, battery separator, battery electrode, and manufacturing methods therefor, and lithium secondary battery

A separator for an electrochemical device of the present invention includes a porous film including: a filler; an organic binder; and at least one resin selected from resin A that has a melting point of 80 to 140&#xb0; C. and resin B that absorbs a non-aqueous electrolyte and swells upon heating and whose swelling degree increases with increasing temperature, and the filler contains boehmite having a secondary particle structure in which primary particles are connected.

Separator for electrochemical device, electrode for electrochemical device, and electrochemical device

A separator for batteries according to the present invention includes a multilayer porous film having a resin porous film containing a thermoplastic resin as a main component and a heat resistant porous layer containing heat resistant particles as a main component, and the heat resistant porous layer has a thickness of 1 to 15 &#x3bc;m, and the 180&#xb0; peel strength between the resin porous film and the heat resistant porous layer is 0.6 N/cm or more.

Separator for battery and nonaqueous electrolyte battery using same

An electrochemical device having excellent safety at a high temperature is provided by using a separator for an electrochemical device, which is made of a porous film including a first separator layer and a second separator layer. The first separator layer includes, as a main ingredient, at least one kind of resin selected from the group consisting of resin A that has a melting point in a range of 80&#xb0; C. to 130&#xb0; C., and resin B that absorbs a nonaqueous electrolyte and swells due to heating and whose swelling degree is increased as the temperature rises, the second separator layer includes, as a main ingredient, a filler that has a heat-resistant temperature of not lower than 150&#xb0; C., and at least one of the first separator layer and the second separator layer includes flakes.

Separator for electrochemical device and method for producing the same, and electrochemical device and method for producing the same

A samples storage system for pharmaceutical development in which the usable volumes of ultramicrotubes (384 tubes) are increased and smooth insertion and extraction of ultramicrotubes is possible irrespective of the positions of the ultramicrotubes. The samples storage system includes tubes in which samples are sealed and a storage rack for vertically accommodating a plurality of the tubes in a grid pattern. Each tube is of a rectangular hollow tubular cross-section and the intersect is tapered toward the bottom portion of the tube. Corner portions of the outer four side surfaces of the tubes are chamfered. The storage rack has engagement partition walls forming open-ended sections in a grid pattern inside the rack frame. The height of the walls is smaller than the length of the tube, and tube-supporting pins project vertically from the intersections of the grid. The outermost walls of the grid are spaced inwardly from the frame so that all of the tubes in the grid are supported for ready insertion and removal.

Samples storage system for pharmaceutical development

A pharmaceutical sample storage system in which the accommodation volume of a case is increased is disclosed and claimed. The molding of the storage rack is easy. The cases in the storage rack are locked in place and will not fall out even if the storage rack is turned upside down. Placing and removing cases from the storage rack is highly accurate. The sample storage system is sealed and the storage rack vertically accommodates a plurality of cases in a matrix. The cases are rectangular in cross-section and are hollow. The cases are tapered toward the bottom portion of the case and the outer surfaces of the cases are chamfered. The storage rack has a lower grate-shaped bottom portion which is partitioned by cross members. The bottom portion of the case being fitted into one partitioned portion of the grate-shaped bottom portion and has case supporting pins vertically provided upward from each intersection of gratings or cross members of the grated bottom portion.

Growing community of inventors

Osaka, Japan

Nobuaki Matsumoto