Patent ID: 9276269
Filing Date: 2016-03-01
CPC Classification: H01M,Y02E

Claim Text:
1. A catalyst layer comprising a catalyst material, wherein the catalyst layer has a single layer structure and has a porosity of 20 to 90% by vol and the catalyst layer satisfies a relation: wherein: R1 is an alignment ratio of the catalyst layer; and R0 is an alignment ratio of the catalyst material in powder form having a random crystalline plane distribution, wherein each of the alignment ratios is calculated from a X-ray diffraction spectrum having a diffraction angle 2θ range from 10 to 90 degree measured using Cu-Kα-rays, and is defined as a ratio of a diffraction peak area contributed by the most closely packed crystalline planes of a material to a total area of all diffraction peaks of the same material at the 2θ range from 10 to 90 degree, wherein the catalyst layer is formed on a substrate having a flatness of 60% or more and wherein the substrate is a carbon sheet.