Hitachi Metals, Ltd.

Yuji Kawauchi

Akira Kawakami

Setsuo Andoh

Hironori Nakanishi

Hidehisa Yamaguchi

This invention provides a casing for storing MEA, which has satisfactory corrosion resistance to formic acid produced in an electrode reaction of MEA. There is also provided a casing formed of a material having the lowest possible specific gravity that can apply a suitable pushing pressure to MEA and a current collector without increasing the thickness dimension and is suitable for a power supply mounted, for example, in small portable electronic equipment. The casing is a casing for use in a fuel battery in which a hydrogen electrode, an oxygen electrode, and a film-electrode joint product formed of a proton conductive film held between the hydrogen electrode and the oxygen electrode are housed within the casing and, in removing water produced in an oxygen electrode reaction, the above water comes into contact with the casing. The casing for a fuel battery comprises a base material () formed of a magnesium alloy and a film () provided on the base material (). The film () comprises a conversion treated film (), an undercoating layer (), and a top coating layer () provided in that order from the base material side.

Casing for fuel battery and fuel battery using the same

There is disclosed a composite material for an electronic part which has high thermal conductivity in a laminated direction, and also has low-thermal expansion characteristics. The composite material, used for a heat sink or a heat spreader, includes high-thermal conductivity layers of copper or a copper alloy and low-thermal expansion layers of a Fe--Ni alloy which are alternatively laminated to form a multi-layer structure having not less than 10 layers and preferably not less than 50 layers. Any two adjacent ones of the high-thermal conductivity layers, having the low-thermal expansion layer interposed therebetween, are continuous with each other through a plurality of through holes formed through the low-thermal expansion layer. This composite material can be produced by a method in which thin sheets of copper or a copper alloy and thin sheets of a Fe--Ni alloy (having a plurality of through holes) are alternatively stacked, and this stack is sealed in a vacuum not higher than 10-3 Torr, and the stack of layers is subjected to a bonding treatment at a temperature of 700 to 1,050.degree. C. under a pressure of not less than 50 MPa to provide a laminated structure, and this laminated structure is rolled into a sheet with a predetermined thickness.

Growing community of inventors

Yasugi, Japan

Yuji Kawauchi