A basic overview of the PEM industry

Proton exchange membrane PEM is widely used. A proton exchange membrane (proton exchange membrane), also known as a proton or hydrogen ion exchange membrane, is an ion-selective permeable membrane that acts as a channel for proton migration and transport, separating gaseous reactants and blocking electrolytes in cells (electrolytic cells).

1, The application

The basic structure of a proton exchange membrane fuel cell (PEMFC) consists of a membrane electrode (MEA) for separating oxidant and reducing agent and bipolar plates on both sides. MEA is a five-piece structure composed of anode/cathode gas diffusion layer (GDL), anode/cathode catalytic layer (CL) and proton exchange membrane (PEM). The performance of the PEM directly determines the performance and service life of the fuel cell, which is basically equivalent to the "chip" of electronic equipment. The main performance metrics of the PEM include EV(ion base value), particle conductivity, film thickness, and cost.

2, Classification

Proton exchange membrane is divided into perfluorinated sulfonic acid membrane, partially fluorinated polymerized proton exchange membrane, composite proton exchange membrane and non-fluorinated polymerized proton exchange membrane according to fluorine content. Among them, perfluorinated sulfate membrane is the most commercialized PEMFC electrolyte membrane, which has the advantages of high mechanical strength, good chemical stability, high conductivity at high humidity, high current density at low temperature, and low proton conduction resistance.

3. Production process

The preparation of proton exchange membrane can be divided into two categories: melt forming method and solution forming method, of which solution forming method is the mainstream method for research and commercial products. According to the latter process, the solution film formation method can be further subdivided into solution flow method, solution flow method and sol-gel method.

The Shanghai Yangmi fuel Cell catalyst coating system can produce highly uniform, repeatable and long-lasting coatings that are particularly suited for these challenging applications. From R&D to production, our anti-clogging technology allows for better control of coating properties, significantly reducing raw material usage and reducing maintenance and downtime.

In the electrolysis process of fuel cells and proton exchange membrane (PEM) electrolytes such as Nafion, the ultrasonic coating system produces a highly durable and uniform carbon-based catalyst ink coating without membrane deformation. Uniform catalyst coatings are deposited on PEM fuel cells, GDL, electrodes, various electrolyte films, and solid oxide fuel cells sprayed with carbon black ink, Teflon binders, ceramic slurry, platinum, and other noble metals suspensions. Ultrasonic spraying can also be used to metal alloys including platinum, nickel and other metal oxide suspension, according to nail and base coating, fuel cell catalyst made into PEM fuel cells, polymer electrolyte membrane (PEM) battery, DMFC(direct methanol fuel cells) and SOFC(solid oxide fuel cells) can produce high-efficiency battery load.