A kind of preparation method of membrane electrode for water electrolysis

Abstract

The invention relates to a method for preparing a membrane electrode for electrolyzing water, comprising the following preparation steps: S1: take a proton exchange membrane, soak it in pure water for 5-10min, then take out the proton exchange membrane and remove the surface Blot the water dry, and then apply adhesive on both sides of proton exchange membrane one; S2: take proton exchange membrane two, heat it to a molten state, and then take platinum powder particles, dispersant and proton exchange membrane in molten state 2. Fully mix according to the mass ratio of 1:30:1 to make a catalyst slurry; S3: Take two equal parts of the catalyst slurry and apply them to the adhesive on both sides of the proton exchange membrane to form the anode catalyst layer and The cathode catalytic layer is left to cool for 0.5-1 hour to form a primary membrane electrode; S4: heat and press to form a membrane electrode. The invention has the advantages of improving the bonding strength between the catalytic layer and the proton exchange membrane, and reducing the possibility that the catalytic layer will be peeled off from the proton exchange membrane due to uneven force.

Description

technical field [0001] The invention relates to the technical field of electrolyzed water, in particular to a method for preparing a membrane electrode for electrolyzed water. Background technique [0002] Hydrogen is regarded as the most ideal energy carrier due to its clean, pollution-free, efficient, storable and transportable advantages. Hydrogen production by electrolysis of water is currently the easiest way to obtain pure hydrogen. If it is combined with renewable resource power generation technologies, such as photovoltaic power generation, hydropower generation and wind power generation, electrolysis of water can be used as a large-scale hydrogen production technology, which will not pollute the environment Small, less greenhouse gas emissions, good economy, has a good application prospect. [0003] At present, the electrolyzed water technology used in industry is mainly alkaline electrolyzed water technology. After years of development, this technology has the adv...

AI Technical Summary

Problems solved by technology

The existing problems include: high cost due to the use of precious metals (low cost performance), electrolysis efficiency (energy conversion efficiency) still cannot meet the requirements of new energy technology for high energy conversion efficiency, catalyst layer and solid polymer membrane ( The binding force between the proton exchange membrane) is not strong enough to reduce the stability of the electrolytic water device, etc.

[0008] When water is electrolyzed, a large amount of hydrogen and oxygen will be generated from the surface of the catalytic layer of the cathode and anode respectively, and the gas will have a strong scouring effect on the catalytic layer; at the same time, the deformation caused by the thermal expansion or swelling of the Nafion membrane will also cause the catalytic layer to be damaged. The uneven force causes the catalytic layer to peel off from the Nafion membrane, which affects the electrode stability of the membrane electrode