Abstract: 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.

Abstract: 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 catalyst 13 which has oxygen reduction activity and a process of blending the catalyst 13 with 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.

Abstract: 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.

Abstract: 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 catalyst 13 which has oxygen reduction activity and a process of blending the catalyst 13 with 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.

Abstract: 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.

Abstract: The present invention provides an electrode catalyst layer and a manufacturing method thereof, wherein the electrode catalyst layer contains an oxide type of non-platinum catalyst as the catalyst and enables a fuel cell employing the electrode catalyst layer to achieve a high level of power generation performance, as well as an MEA and the fuel cell which employ the electrode catalyst layer. The manufacturing method of the electrode catalyst layer of the present invention includes preparing a “catalyst provided with electrical conductivity on the surface”. In addition, the manufacturing method may further include preparing a catalyst ink, in which the “catalyst provided with electrical conductivity on the surface”, carbon particles and a polymer electrolyte are dispersed in a solvent, and coating the catalyst ink to form the electrode catalyst layer.

Abstract: The present invention provides a fuel cell and a membrane electrode assembly thereof employing an electrode catalyst layer which contains an oxide type of non-platinum catalyst as the catalyst and enables the fuel cell to achieve a high level of power generation performance. One aspect of the present invention is the electrode catalyst layer containing a polymer electrolyte, a catalyst and an electron conductive material, wherein a content ratio by weight of the catalyst is in the range of 0.1-3.0 with respect to 1.0 of the electron conductive material and a content ratio by weight of the polymer electrolyte is in the range of 0.5-3.0 with respect to 1.0 of the electron conductive material.

Abstract: 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.