FUEL CELL

PROBLEM TO BE SOLVED: To improve electric power generation efficiency by improving the structure of a positive electrode of a fuel cell for efficiently draining formed water excessively generated during high-load operation and a long-term operation, while moisturizing an electrolyte film. SOLUTION:...

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Bibliographic Details
Main Authors KIKUCHI TETSUO, TAKAHASHI TAKESHI, SO ITSUSHIN, NITTA TAKAHIRO
Format Patent
LanguageEnglish
Published 11.10.2002
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
SEPARATION
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To improve electric power generation efficiency by improving the structure of a positive electrode of a fuel cell for efficiently draining formed water excessively generated during high-load operation and a long-term operation, while moisturizing an electrolyte film. SOLUTION: A positive electrode 3 and a negative electrode 4 are arranged with interposing an electrolyte film 2, and oxidization gas is supplier to a gas flow passage 51 of the positive electrode 3 side and fuel gas is supplied to a gas flow passage 61 of the negative electrode 4 side, to generate electric power. The positive electrode 3 includes a hydrophilic base material layer 31 and a water-repellant layer 32 partially formed on the side of the surface of the gas flow passage 51. The water-repellant layer 32 is formed on a surface, excluding the lower part of the base material layer 31 where excessive formation water formed by positive electrode reaction is retained, to accelerate draining of retaining formed water.
Bibliography:Application Number: JP20010102895