Electrode substrate for a fuel cell, a method for preparing the same, and a membrane-electrode assembly comprising the same
AssigneeSamsung SDI Co., Ltd.
InventorsSung-Yong Cho, Jong-Ki Lee, Yeong-Chan Eun, Ho-Jin Kweon
Life of this patent
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Abstract
An electrode substrate for a fuel cell including a diffusion layer, a first microporous layer that embeds into the diffusion layer, with the first microporous layer having a thickness in the range of 10 to 30 μm, and a second microporous layer that forms a boundary with the diffusion layer on the surface of the first microporous layer. The electrode substrate has improved performance such as increased diffusion properties of a fuel or an oxidant, increased properties of releasing moisture, and enhanced electron conductivity.
Claims8
A method of preparing an electrode substrate for a fuel cell, comprising:
- mixing carbon material, a binder, and a solvent to prepare a coating composition;
- coating the coating composition onto a diffusion layer;
- and
- firing the coated diffusion layer to form a first microporous layer that embeds into the diffusion layer, the first microporous layer having a thickness in the range of 10 to 30 μm, and a second microporous layer that forms a boundary with the diffusion layer, wherein the second microporous layer is on the surface of the embedded first microporous layer.
Dependencies are inferred from the claim text.