Hitachi Cable, Inc.

Hitachi, Ltd.

Hitachi Powdered Metals Co., Ltd.

Masahiro Seido

Kazuhiko Nakagawa

Mineo Washima

Takaaki Sasaoka

Tatsuya Tonogi

Makoto Kitano

Tomoichi Kamo

Ryuji Kohno

Tatsuya Nagata

Kunihiro Fukuda

Katsuzo Aihara

Akira Nomoto

Katsumi Nomura

Morio Kimura

Junichi Sato

Minoru Shirahige

Masahiro Okahara

Tsutomu Yamanaka

A method of producing a NbSn superconducting wire rod includes forming a wire rod comprising Nb, Sn and Cu, and having a mole ratio of the Sn expressed as ax+b(1&#x2212;x), where 0.25&#x2266;x&#x2266;0.8, 0.3&#x2266;a&#x2266;0.4 and 0.02&#x2266;b&#x2266;0.1, and x and 1&#x2212;x are prescribed as a mole ratio of the Nb and a mole ratio of the Cu, respectively, to a total of a mole number of the Nb and a mole number of the Cu, and heating the wire rod to produce NbSn from the Sn and the Nb. By the heating of the wire rod, a Cu&#x2014;Sn alloy is produced from the Sn and the Cu, concurrently with the NbSn produced from the Sn and the Nb.

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A metal separator for fuel cells formed with a metal plate and provided between cells accumulated, in which the metal plate is formed like trapezoidal irregularities to separate channels for a fuel gas from ones for an oxidant gas. Slope portions are formed after forming uniformly and thinly wall thickness of both upper and lower flat portions or either of the upper or the lower flat portion to 90% or less of that of the metal plate to be formed to obtain trapezoidal irregularities by forming flat portions which contact upper and lower cells and slope portions which interconnect the upper and the lower flat portions.

Metal separator for fuel cells and fabricating method thereof

A current-collecting composite plate for a fuel cell configured with unit cells according to the present invention, which comprises: an insulator layer; and a plurality of pairs of conductor layers, the conductor layers being bonded to the insulator layer to be spaced apart from each other by a predetermined distance, each pair being used for adjacently disposed anode and cathode electrodes for a different one of the unit cells by sandwiching an electrolyte assembly therebetween. And, each conductor layer includes: a first conductor layer of a corrosion resistant metal treated with an electrically conductive surface treatment; a second conductor layer of a metal with low electrical resistivity; a through-hole penetrating the first conductor layer and the insulator layer; and a connecting portion formed of the second conductor layer for connecting the unit cells.

Current-collecting composite plate for fuel cell and fuel cell fabricated using same

A metal composite for fuel cells according to the present invention, which includes: a core of a metal; cladded layers of a corrosion resistant metal covering both surfaces of the core; and a through-hole formed through the core and cladded layers. The through-hole has, on a hole wall of the core region of the through-hole, a concave portion which is recessed relative to hole walls of the cladded layer regions of the through-hole.

Metal composite for fuel cell and fuel cell bipolar plate using same, and fabrication method for same

According to the present invention, there is provided a membrane electrode composite module including a membrane electrode composite formed by sandwiching both surfaces of an electrolyte membrane between gas diffusion electrodes, an anode current collecting plate having fuel flow holes through which fuel flows, and a cathode current collecting plate having oxygen flow holes through which oxygen flows, wherein both surfaces of the membrane electrode composite are sandwiched between the anode current collecting plate and the cathode current collecting plate, the membrane electrode composite module further including films made of a synthetic resin (a first film and a second film) which are a base of the anode current collecting plate and a base of the cathode current collecting plate.

Membrane electrode composite module, fuel cell and electronic equipment, and method of manufacturing the membrane electrode composite module

A fuel cell having: a fuel electrode and an oxidant electrode disposed to sandwich a solid polymer electrolyte membrane; current collecting plates disposed outside of the fuel electrode and the oxidant electrode; a fuel electrode channel member disposed outside of the current collecting plate disposed outside of the fuel electrode; and an oxidant electrode channel member disposed outside of the current collecting plate disposed outside of the oxidant electrode. The oxidant electrode channel member has a thickness of not less than 1.2 mm. The fuel cell is a direct methanol type fuel cell.

Fuel cell having electrode channel member with comb-teeth shape

A corrosive resistant metal material covered with a conductive substance suitable for use in a component material requiring conductivity and corrosion resistance like electrical conductive material, electrical contact, electromagnetic wave shield, electrochemical electrode or antistatic material, specifically for component material requiring conductivity in sever condition of corrosive environment is provided. A corrosive resistant metal material covered with a conductive substance is formed by cladding a corrosive resistant metal selected from the group consisting of titanium, zirconium, tantalum, niobium and alloy thereof on a conductive metal selected from the group consisting of iron, aluminum, copper, titanium, magnesium, zirconium, tantalum, niobium, tungsten, nickel, chrome and alloy thereof, and covering a conductive surface finishing layer over surface of a corrosive resistant metal layer with a mixture of conductive substance and resinous binder.

Corrosive resistant metal material covered with conductive substance

The surface of highly conductive iron, copper, aluminum, magnesium, or alloy thereof is covered with highly corrosion-resistant titanium or titanium alloy through plastic working by rolling or extrusion to form a cladding material. At least one surface of the cladding material is covered with a carbon material to form a separator for a solid polymer electrolyte fuel cell. By virtue of the above constitution, the separator for a solid polymer electrolyte fuel cell has good workability and, at the same time, can surely maintain or improve electrical conductivity and corrosion resistance.

Separator for solid polymer electrolyte fuel cell and process for producing the same

Wire, bulk, film, etc. of a superconductive material is manufactured from a powdery precursor. The superconductive material has a superconductive crystal of 1223 phase and/or 1234 phase as a main component, and the powdery precursor comprises at least 1212 phase as a main component.

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Tsuchiura, Japan

Masahiro Seido