Patent ID: 9570758
Date: 2017-02-14
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. A manufacturing method for a gas diffusion layer of a fuel cell, comprising the steps of: prior to layering a plurality of cells of a fuel cell in a stack, applying a predetermined first pressure to a gas diffusion layer, formed by stacking a layer made of a carbon fiber and a water-repellent layer, in a thickness direction of the gas diffusion layer; and removing a carbon fiber protruding from the water-repellent layer when the gas diffusion layer is pressed with the predetermined first pressure, wherein the step of removing a protruding carbon fiber is a step of burning and removing the protruding carbon fiber by passage of electricity through the protruding carbon fiber, and wherein a value of the predetermined first pressure corresponds to a value of a second pressure which is to be applied to the gas diffusion layer in a step of layering the plurality of cells of a fuel cell layered in a stack.