Fuel cell electrode structure and preparation method thereof

Abstract

The invention discloses a fuel cell electrode structure and a preparation method thereof. The electrode structure comprises an active zone and a frame zone arranged around the active zone, wherein the active zone comprises a proton exchange membrane, catalysis layers and porous diffusion layers; the catalysis layers are respectively positioned on two sides of the proton exchange membrane; two sides of the catalysis layers are respectively pressed with the porous diffusion layers; the frame zone comprises a zone where the proton exchange membrane extends out of the edges of the catalysis layers and a fiber-reinforced composite material is clamped on the two sides, extending out of the edges of the catalysis layers, of the proton exchange membrane; the frame zone is thinner than the active zone. The invention further provides the preparation method of the electrode structure. Through adoption of the electrode structure and the preparation method, not only can the cell sealing problem be solved, but also the cell sealing reliability can be improved and the additional weight can be reduced; the cell service life is prolonged, the operation is simple, and the production efficiency is high.

Description

technical field [0001] The invention relates to a battery electrode structure and a preparation method thereof, in particular to a battery electrode structure with a sealed frame for a proton exchange membrane fuel cell and a preparation method thereof. Background technique [0002] In the 21st century, with the depletion of oil resources and the improvement of people's awareness of environmental protection, the global energy system is undergoing changes. Breaking the traditional oil-centered energy monopoly and developing efficient and clean energy has become the consensus of most countries. [0003] Among them is hydrogen energy. One form of hydrogen energy utilization is to use fuel cells to generate electricity, so that hydrogen and air undergo electrochemical reactions to generate clean electricity, and the product is only water. This zero-pollution and zero-emission clean energy has become the ultimate solution for vehicle power. [0004] Fuel cells provide energy in...

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Problems solved by technology

[0023] Injection molding requires the development of molds, and the cost of one-time investment is high; the precision of the mold is very high, the yield of the mold is low during operation, and the flow of rubber makes it difficult to ensure the uniformity of the prepared frame, and the thinner the thickness, the more difficult it is to control the precision; the frame And after injection molding, the material needs a long time to solidify, the operation time is long, and the productivity is low

[0024] In addition, in the process mentioned above, the number of frame layers is large, which brings an increase in the extra weight of the electrode. This increase in ineffective weight will lead to a bulky stack and a decrease in specific power.

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