Toppan Printing Co., Ltd.

Kenichiro Oota

Hiroyuki Morioka

Saori Okada

Haruna Kurata

The present invention provides a manufacturing method of an electrode catalyst layer which contains a catalyst, carbon particles and a polymer electrolyte, wherein an oxide type of non-platinum catalyst is used as the catalyst and a fuel cell employing the electrode catalyst layer achieves a high level of power generation performance. The manufacturing method of the electrode catalyst layer of the present invention includes at least: preparing a first catalyst ink, in which a catalyst, first carbon particles and a first polymer electrolyte are dispersed in a first solvent, drying the first catalyst ink to form complex particles, preparing a second catalyst ink, in which the complex particles, second carbon particles and a second polymer electrolyte are dispersed in a second solvent, and coating the second catalyst ink on a substrate to form the electrode catalyst layer.

Manufacturing method of electrode catalyst layer, membrane electrode assembly using the same, fuel cell using the same and complex particles

According to the present invention, it is possible to improve the use ratio of active sites in a catalyst having oxygen reduction activity so as to provide a cathode catalyst layer and MEA for a fuel cell with high a level of power generation performance. The present invention includes a process of introducing a functional group into a surface of the catalystwhich has oxygen reduction activity and a process of blending the catalystwith the functional group on the surface together with an electron conductive material and a proton conductive polymer electrolyte to prepare a catalyst ink for forming the cathode catalyst layer for the fuel cell.

Cathode catalyst layer, manufacturing method thereof and membrane electrode assembly

The present invention provides a method for manufacturing an electrode catalyst layer for a fuel cell which includes a polymer electrolyte, a catalyst material and carbon particles, wherein the electrode catalyst layer employs a non-precious metal catalyst and has a high level of power generation performance. The electrode catalyst layer is used as a pair of electrode catalyst layers in a fuel cell in which a polymer electrolyte membrane is interposed between the pair of the electrode catalyst layers which are further interposed between a pair of gas diffusion layers. The method of the present invention has such a feature that the catalyst material or the carbon particles are preliminarily embedded in the polymer electrolyte.

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Kanagawa, Japan

Kenichiro Oota