A combined device and method for preparing a fuel cell membrane electrode

Abstract

A combination device and method for preparing fuel cell membrane electrodes, the combination device includes a hot-press tooling upper plate, a hot-press tooling lower plate, an anode electrode positioning tool, and a cathode electrode positioning tool, wherein the hot-press tooling upper The plate and the lower plate of the hot-pressing tooling respectively include a positioning hole, a buffer pad and a boss, the size and shape of the buffer pad match the membrane electrode support frame, and the size and shape of the boss match the electrode that it contacts, The size and shape of the inner frame of the anode electrode positioning tool and the cathode electrode positioning tool match with the anode electrode and the cathode electrode respectively. This application can complete the production of the seven-in-one membrane electrode at one time, avoiding the repeated disassembly and assembly of the proton exchange membrane caused by the replacement of tooling and fixtures during the membrane electrode preparation process, thereby avoiding various failures of the proton exchange membrane in the membrane electrode , improves the yield of membrane electrode products, has a simple structure, is convenient to operate, and is suitable for large-scale promotion in this field.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a preparation tool and method for fuel cell membrane electrodes. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy through an electrode reaction. A fuel cell is typically constructed of a plurality of cells, each cell comprising two electrodes (anode and cathode) separated by an electrolyte element and assembled in series with each other to form a fuel cell stack. [0003] One of the core components of the fuel cell is the membrane electrode MEA, which consists of a proton exchange membrane and two porous conductive materials, such as carbon paper, sandwiched between the two sides of the membrane. On the two boundary surfaces of the membrane and the carbon paper, there are even and finely dispersed catalysts for initiating electrochemical reactions, such as metal platinum ...

AI Technical Summary

Problems solved by technology

[0005] Chinese Publication No. CN1276633 discloses a method for preparing multiple membrane electrodes on one piece of membrane. This method has the following disadvantages: since there is no positioning device for the gas diffusion layers on the upper and lower sides, it will cause difficulty in assembly, and even cause multiple Serious consequences of misalignment of gas diffusion layers on the upper and lower sides of the membrane electrode

However, the strength of screwing is very high, and the screw or thread is easy to wear after repeated use.

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