The fuel cell

Abstract

A membrane electrode assembly (15) formed by a solid electrolyte membrane (16) and electrode catalyst layers (17, 18) is interposed between a pair of frames (13, 14). Gas diffusion layers (19, 20) are laminated onto the surface of the electrode catalyst layers (17, 18). A first gas passage forming member (21) is laminated onto the surface of the gas diffusion layer (19) while a second gas passage forming member (22) is laminated onto the surface of the gas diffusion layer (20). Separators (23, 24) contact surfaces of the frame (13, 14) and the first and second gas passage forming member (21, 22). A plurality of first and second straight grooves (21c, 21d) are formed on the first gas passage forming member (21), such that the widths (w1, w2) differ from each other, and cross-sectional areas of the paths for the first and second gas passages (T1, T2) differ from each other.

Description

technical field [0001] The present invention relates to a fuel cell for use in an electric vehicle or the like, and more particularly to a fuel cell capable of improving power generation performance. technical background [0002] Typically, a fuel cell consists of components such as Figure 13 A fuel cell stack 11 is formed by stacking a plurality of power generation cells 12 as shown in FIG. like Figure 14 As shown, an electrode assembly 15 is placed at a coupling portion of a pair of frames 13, 14 for forming these power generation cells 12, respectively. The electrode assembly 15 includes a solid electrolyte membrane 16, an electrode catalyst layer 17 positioned on the anode side, and an electrode catalyst layer 18 positioned on the cathode side. The outer peripheral edge of the solid electrolyte membrane 16 is fixed by being sandwiched between the frames 13, 14. The anode side gas diffusion layer 19 is laminated on the surface of the electrode catalyst 17 , and the c...

AI Technical Summary

Problems solved by technology

Therefore the following problem arises

Images