Electrochemical device and method for preparation thereof

Details Electrochemical device and method for preparation thereof Electrochemical device and method for preparation thereof

2005-01-11

2005-01-11

Ryan, Patrick (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Having earth feature

C429S006000, C429S047000

Reexamination Certificate

active

06841289

ABSTRACT:
An electrochemical device and a method for the preparation thereof, the electrochemical device having a high catalyst utilization efficiency including a gas diffusion electrode formed of a carbonaceous material and having a catalyst formed on at least a portion of its surface, and a proton conducting film provided in contact with one surface of the gas diffusion electrode, wherein the amount of the catalyst formed on the surface of the carbonaceous material contacting the proton conducting film is lesser in amount than on the surface of the carbonaceous material that is not contacting the proton conducting film, thereby appreciably increasing catalyst utilization efficiency and rendering it possible to elevate the energy efficiency of the electrochemical device.

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Edie et al., Effect of Microstructure and Shape on Carbon Fiber Properties, pp. 41-45, 1993, Noyes Publications, New Jersey.

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