Gas diffusion layer for fuel cell, fuel cell, and formation method for gas diffusion layer for fuel cell

• Main Authors: KAWASHIMA TSUTOMU, IMURA SHINICHIRO, SHOJI MASASHI
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A first porous layer (42) comprises a groove-shaped fluid passage (44) opening into one main surface of the first porous layer (42). A second porous layer (46) is disposed on the other main surface side of the first porous layer (42). Here, the occupancy area rate of a conductive fiber (28) per unit area in a cross section of the first porous layer (42) is smaller than the occupancy area rate of the conductive fiber (28) in a cross section of the second porous layer (46). Further, the second porous layer (46) is exposed in a portion of the surface of the fluid passage (44). 第多孔质层(42)具有在个主表面开口的槽状的流体流路(44)。第二多孔质层(46)配置在第多孔质层(42)的另个主表面侧。在此，第多孔质层(42)的截面中的每单元面积的导电性纤维(28)的占有面积率小于第二多孔质层(46)的截面中的导电性纤维(28)的占有面积率。此外，在流体流路(44)的表面的部分露出有第二多孔质层(46)。