Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yasuhiro Ueyama

Kazunori Kubota

Masaru Watanabe

Hideo Hatanaka

Shuzo Tsuchida

Yasushi Taniguchi

Masahiro Mori

Toshiyuki Kojima

Kazuyuki Tohji

Hideyuki Takahashi

Shinya Kikuzumi

Yorihito Ohana

Toshikazu Nakamura

Ryouhei Seki

Shun Yokoyama

Tetsuya Hayashi

Kazuyoshi Honda

Yoichiro Tsuji

Eiichi Yasumoto

Kazuya Iwamoto

Shuji Ito

Makoto Uchida

Yasutaka Kogetsu

Taisuke Yamamoto

Norihiko Kawabata

Akihiro Horikawa

Keisuke Ohara

Tsutomu Kawashima

Reiko Taniguchi

Yusuke Ozaki

Hideaki Komoda

Kazunori Sakamoto

Kunio Tsuruta

Nobuyuki Aoki

Takao Kuromiya

Shinji Yoshino

Kiyoshi Kobata

Keiichi Ochiai

Tetsuo Satake

Kazuya Ushirokawa

Nobuyuki Kamikihara

Hitoshi Katayama

Hideki Okumura

Kouji Inoue

Isao Fujiwara

A catalyst, includes: a carbon support that possesses functional groups including a carboxyl group; and a metal that is supported onto the carbon support, wherein the proportion of the carboxyl group to the functional groups is 10% or higher. A method for producing a catalyst includes: (i) supporting metal particles onto a carbon support; (ii) bringing the carbon support into contact with an acid solution; and (iii) calcining the carbon support after Step (ii), wherein the carbon support included in the produced catalyst possesses functional groups including a carboxyl group, and the proportion of said carboxyl group to the functional groups is 10% or higher.

Metal particle supported catalysts, methods for producing same, and fuel cells using same

In an electrolyte membrane for a fuel cell, having nanofiber unwoven cloth buried in an electrolyte resin, the nanofiber unwoven cloth is disposed being exposed only from one face of the electrolyte membrane. The fuel cell includes a MEA having an anode electrode disposed on one face of the electrolyte membrane and having a cathode electrode disposed on the other face thereof, and a pair of separators holding the MEA by sandwiching the MEA therebetween. Thereby, the electrolyte membrane for a fuel cell, the manufacturing method of the electrolyte membrane, and the fuel cell are provided with which the electric power generation property and productivity are improved.

Electrolyte membrane for fuel cell, manufacturing method of electrolyte membrane, membrane electrode assembly, and fuel cell

Provided is a method for producing a catalyst, including: (i) mixing a core metal salt that serves as a material for a core metal, and a complexing agent (a) to produce a core metal complex solution containing a core metal complex; (ii) mixing a shell metal salt that serves as a material for a shell metal, and a complexing agent (b) to produce a shell metal complex solution containing a shell metal complex; (iii) mixing a carbon powder and a dispersing agent to produce a carbon powder dispersion; (iv) mixing the core metal complex solution, the shell metal complex solution, and the carbon powder dispersion, and reducing the core metal complex and the shell metal complex on the carbon powder by using at least one reducing agent; and (v) drying and baking at a predetermined temperature the carbon powder resulting from Step (iv), said carbon powder having a core-shell structure that includes the core metal and the shell metal.

Method for producing core-shell catalyst

A gas-producing apparatus that produces hydrogen or oxygen, includes: an electrolysis cell that produces hydrogen and oxygen through electrolysis of water; and a gas-liquid separation device that is connected to the electrolysis cell and that receives the water and the hydrogen or the oxygen, wherein the gas-liquid separation device includes a first chamber and a second chamber, the first chamber and the second chamber are separated by a partition wall, and a lower part of the first chamber and a lower part of the second chamber communicate with one another.

Gas-producing apparatus and gas-producing method

A manufacturing method of a supported platinum catalyst, includes: generating a platinum group salt solution using platinum group salts and a complexing agent; mixing the platinum group salt solution and a carbon powder dispersion in which carbon powder is dispersed; and adding a reducing agent to a mixed solution of the platinum group salt solution and the carbon powder dispersion, and reducing the platinum group salts to allow the platinum group particles to be supported on the carbon powder.

Supported platinum catalyst and manufacturing method of the same

An electrolyte membrane for solid polymer fuel cell includes a reinforce membrane made of nonwoven fibers and an electrolyte provided in a space among the nonwoven fibers. The nonwoven fibers have a non-uniform mass distribution in a plane of the electrolyte membrane. A mass of the nonwoven fibers per unit area in a region corresponding to at least part of a peripheral portion of a fuel cell-use gasket frame is greater than a mass of the nonwoven fibers per unit area in a region corresponding to a center portion of the gasket frame. The electrolyte membrane for solid polymer fuel cell is attached to the fuel cell-use gasket frame.

Electrolyte membrane for solid polymer fuel cells, membrane electrode assembly having said electrolyte membrane, and solid polymer fuel cell

The present invention relates to a current collector including a base portion with a flat face, primary projections projecting from the flat face, and secondary projections projecting from the top of the primary projections. The present invention also relates to a current collector including a base portion with a flat face and primary projections projecting from the flat face, wherein the roughening rate of the top of the primary projections is 3 to 20. By using such a current collector, separation of the active material from the current collector can be inhibited when using an active material that has a high capacity but undergoes a large expansion at the time of lithium ion absorption.

Electrode, and current collector used therefor

The present invention relates to a rechargeable lithium ion battery having an electrode plate with a high active material density and high electrolyte permeability. Upon producing the rechargeable lithium ion battery, hollow resin particles that can be collapsed by rolling are incorporated in a positive electrode mixture layer or a negative electrode mixture layer before the electrode mixture layer is rolled. The hollow resin particles are collapsed in the course of rolling the positive electrode mixture layer or the negative electrode mixture layer, so that the active material density can be easily increased. Further, the collapsed resin particles form unevenness on the surface of the electrode plate and also form open pores in the electrode plate, so that electrolyte permeability can be enhanced. As a result, the discharge capacity and rate characteristics of rechargeable lithium ion batteries can be increased.

Rechargeable lithium ion battery and method for producing the same

A solid polymer electrolyte fuel cell includes a membrane electrode assembly having an anode, a cathode arranged facing the anode, and a polyelectrolyte membrane arranged between the anode and the cathode, and a pair of separator plates that are arranged facing each other so as to sandwich the membrane electrode assembly, and have an anode side gas channel for supplying a fuel gas to the anode, and a cathode side gas channel for supplying an oxidant gas to the cathode, formed thereon, wherein the catalyst layer of the anode contains at least one electrode catalyst selected from the group consisting of Pt particles and Pt alloy particles, having a particle diameter of from 6 to 10 nm, the catalyst layer of the anode has a thickness of from 1 to 5 &#x3bc;m, Pt volume density in the catalyst layer of the anode is from 1 to 5 g/cm, the catalyst layer of the cathode has a thickness of 10 &#x3bc;m or more, and Pt volume density in the catalyst layer of the cathode is from 0.1 to 0.5 g/cm.

Polymer electrolyte fuel cell

The die as provided is a die in which an upper block is placed on an upper surface of a lower block with a lower surface of the upper block in contact with the upper surface, wherein the lower block includes a manifold and a slit serving as a path for discharging paint from the manifold to the outside, constituted respectively from between the lower block and the lower surface of the upper block by forming a cavity and a space which communicates with the outside from this cavity along a columnar direction, respectively, from one end face of a columnar body with a trapezoidal shape of cross section to the other end face, a paint supply path which communicates with the manifold is formed from an outer side located between the one end face and the other end face of the lower block, a slit space dimension of the slit between front end portions in a paint discharge direction of the lower block and the upper block in a discharge port serving as an open end to the outside is smallest on the one end face side and increases toward the other end face side, and a slit length which is a dimension along the paint discharge direction of a space forming surface of the lower block constituting the slit is largest on at least one of the one end face side and the other end face side and is smallest in a position between both the end faces.

Die, manufacturing method of an optical disk, and an optical disk

A method for producing a polymer electrolyte membrane type fuel cell including a polymer electrolyte membrane, fuel and air electrodes that sandwich therebetween the polymer electrolyte membrane and that each include a gas diffusion layer and a catalyst layer provided in contact with the polymer electrolyte membrane, and separators provided in contact with the gas diffusion layers. A paste containing at least a carbon powder having a catalyst supported thereon is spread over a predetermined support, and the coated support is dried to form the catalyst layer. A cracking occupation area on the electrodes is controlled to a predetermined tolerance by controlling at least one of (1) a thickness of the catalyst layer, (2) a kind of carbon having the catalyst supported thereon, and (3) a drying rate of a solvent of the paste.

Polymer electrolyte fuel cell, fuel cell electrode, method for producing electrode catalyst layer, and method for producing polymer electrolyte fuel cell

A cell that is excellent in discharge characteristics and cycle characteristics is provided by filtering an active material paste, which contains an active material, a binder resin solution, and a conducting agent added as required, at least one time by a filter while stirring the active material paste in a stirring apparatus that has a stirring blade, and then coating a current collector with the active material paste. An active material paste is circulated and filtered by a feeding pump and a filter while being stirred in a stirring apparatus that has a stirring blade. Then, the active material paste is fed to another filter by a metering pump and filtered, and then, a current collector (backing) is coated with the active material paste. Then, the active material paste is dried in a dry zone and taken up by a take-up roller.

Method for manufacturing a cell electrode

Roll 13 drives base material 12 run continuously, and nozzle 1 applies paint 11 supplied by head 2 on base material intermittently. Head 2 shuts the flow of paint 11 to nozzle 1, when application of paint 11 is suspended, and guides to a place other than nozzle 1, at the same time sucks paint 11 staying in the inside of nozzle 1 and at the exit of slit 7 to sucking part 25 provided in inside of nozzle 1; when application of paint 11 is resumed, releases the flow of paint 11 to nozzle 1, at the same time returns paint 11 that was sucked in sucking part 25 to the inside of nozzle 1; thereby the starting edge and the ending edge of coated areas intermittently applied on the base material can be made to assume a straight line shape, and occurrence of the thicker coating at the starting edge is also prevented.

Intermittent coating apparatus, intermittent coating method and

A magnetic recording medium including a non-magnetic polymeric support and a magnetic layer on the non-magnetic polymeric support. The magnetic layer is positioned to be in contact with a record/playback head and includes ferromagnetic powder, abrasive material and binder resin, with at least 40 parts by weight of the abrasive material per 100 parts by weight of the ferromagnetic powder. The ferromagnetic powder has a saturation magnetization .sigma.s of 80 emu/g or more and long axis length of 0.25 .mu.m or less.

Magnetic recording medium

In the magnetic recording medium, the non-magnetic substrate has an under-coat layer including the first flake powder of non-magnetic material on its surface and further has a back-coat film including the second flake powder of non-magnetic material on the opposite face on the non-magnetic substrate to the one face coated by the magnetic film; thereby splendid property of running durability and electromagnetic transducing characteristics is achieved in spite of thinning the total thickness of the magnetic recording medium.

Growing community of inventors

Hyogo, Japan

Yasuhiro Ueyama