MANUFACTURING METHOD OF FUEL CELL ON POROUS SUBSTRATE

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a fuel cell in which a solid electrolyte is prevented from penetrating a porous substrate when a hydrogen ion conveying solid membrane is formed and at the same time a power density of a battery is maintained and moreover is increased.

SOLUTION: Before the liquid electrolyte is deposited, at least a part of a wall 2b showing an outline of a pore 2a of the substrate 2 is covered by a film 10 composed of a material having a contact angle ≥90° against a liquid drop of the liquid electrolyte, so that a liquid electrolyte can be prevented from penetrating a porous substrate 2 and at the same time a power density of a fuel cell can be maintained or increased. Furthermore, the film 10 has a membrane thickness so that a reactive fluid can pass through the pore 2a of the substrate 2.

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