Nec Corporation

Yokohama National University

Hideto Imai

Yoshimi Kubo

Takashi Manako

Tsutomu Yoshitake

Yuichi Shimakawa

Shin Nakamura

Hidekazu Kimura

Sadanori Kuroshima

Takashi Miyazaki

Suguru Watanabe

Shigenori Mitsushima

Takeshi Obata

Masashi Matsumoto

Koichi Matsuzawa

Keisuke Ukita

Ken-ichiro Ota

Akimitsu Isihara

Provided is an oxygen reduction catalyst having a high oxygen reduction performance. An oxygen reduction catalyst according to the present embodiment includes a transition metal oxide to which an oxygen defect is introduced, and a layer that is provided on the transition metal oxide and that contains an electron conductive substance. A method for producing an oxygen reduction catalyst according to the present embodiment includes heating a transition metal carbonitride as a starting material in an oxygen-containing mixed gas. In addition, a method for producing an oxygen reduction catalyst according to the present embodiment includes heating a transition-metal phthalocyanine and a carbon fiber powder as starting materials in an oxygen-containing mixed gas.

Oxygen reduction catalyst and method for producing the same

An adhesive layeris disposed between a carbon particleand a catalyst substanceof a catalyst-supporting particle for a fuel cell containing the carbon particleand the catalyst substance. Thereby, the catalyst-supporting particle for fuel cell can be obtained in which a contact resistance between the catalyst substance and the carbon particle supporting the same is lower, and the aggregation of the catalyst substance is suppressed. A catalyst electrode for a fuel cell and the fuel cell using the above particle have a higher output power and an excellent durability.

Catalyst-supporting particle, composite electrolyte, catalyst electrode for fuel cell, and fuel cell using the same, and methods for fabricating these

An adhesion layer containing a second solid polymer electrolyte is disposed between a solid polymer electrolyte membrane and a fuel electrode and/or an oxidant electrode containing a first solid polymer electrolyte and a catalyst substance. The solid polymer electrolyte membrane and the adhesion layer are made of the same solid polymer electrolyte. In this manner, the adhesion at the interface between the electrode surface and the solid polymer electrolyte membrane is enhanced to implement the elevation of the cell characteristics and the elevation of the reliability of the cell.

Fuel cell, fuel cell electrode and method for fabricating the same

A plurality of fuel electrodes are disposed on one surface of a solid polyelectrolyte membrane, while a plurality of oxidizer electrodes are disposed on the other surface of the same to create a plurality of unit cells which share the solid polyelectrolyte membrane. These unit cells are electrically connected through connection electrode extending through the solid polyelectrolyte membrane. A groove is formed in a region of the solid polyelectrolyte membrane between adjacent unit cells. This groove limits the migration of hydrogen ions to adjacent unit cells to prevent a reduction in voltage. The resulting solid polymer fuel cell, which is in a simple structure and reduced in size, can provide high power.

Fuel cell

Compounds are expressed by general formula of A BC where 0&lE;x&lE;2 and 0&lE;y<1, and have CdI2 analogous layer structures; A-site is occupied by at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Ir, Pt, Au, Sc, rare earth elements containing Y, B, Al, Ga, In, Tl, Sn, Pb and Bi; B-site is occupied by at least one element selected from the group consisting of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W, Ir, and Sn; C-site is occupied by at least one element selected from the group consisting of S, Se and Te; the compounds exhibit large figure of merit so as to be preferable for thermoelectric generator/refrigerator.

Thermoelectric material and thermoelectric converting element using the same

A thin film made of a cobalt-based oxide represented by YBaCo O (&minus;0.5<x<0.05) is used as a resistor material for a bolometer. Provided is also an infrared sensor having a microbridge structure and using the cobalt-based oxide thin film. The temperature coefficient of the electric resistance thereof can be made large.

Oxide thin film for a bolometer, process for producing the same, and infrared sensor using the same

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Tokyo, Japan

Hideto Imai