Hitachi Cable, Inc.

Mineo Washima

Kazuhiko Nakagawa

Masahiro Seido

Takaaki Sasaoka

Kenji Shibata

Fumihito Oka

Kunihiro Fukuda

Katsumi Nomura

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

To smoothly deliver a thermal energy required in an active site of a catalyst carried on a carrier. A method of manufacturing a catalyst carrier of the present invention includes the steps of: forming a mixed thin film in which at least metal and ceramics are mixed on a metal base, by spraying aerosol, with metal powders and ceramic powders mixed therein, on the metal base; and making the mixed thin film porous, by dissolving the metal of the mixed thin film into acid or alkaline solution to remove this metal.

Method of manufacturing catalyst carrier, catalyst carrier, and electrode of fuel cell battery

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

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 fuel battery cell is provided which includes: an internal electrode and an external electrode respectively with predetermined lengths which are coaxially disposed while leaving a predetermined space between the internal electrode and the external electrode; and a composite layer with a predetermined length, having an electrolyte layer and internal and external catalyst layers provided respectively on both sides of the electrolyte layer. In this case, the composite layer is disposed in a predetermined space between the internal electrode and the external electrode while providing a gas passage between the composite layer and the internal electrode and providing a gas passage between the composite layer and the external electrode. In the composite layer, the surface of the internal catalyst layer on its gas passage side and the surface of the external catalyst layer on its gas passage side are covered respectively with waterproof layers.

Growing community of inventors

Tsuchiura, Japan

Mineo Washima