MEA membrane electrode performance

MEA membrane electrodes in fuel cells mainly include proton exchange membrane, catalyst and gas diffusion layer (GDL)

(prepared by CCM method), and sometimes GDL cannot be classified as MEA membrane electrode according to the catalyst

supported by GDL. In this paper, the research and development progress of each membrane electrode assembly and research

units at home and abroad are reviewed. In the upstream technologies of the hydrogen fuel cell industry chain, in addition to

hydrogen production, hydrogen storage, transportation and hydrogenation, it also includes fuel cells such as electrolyte

membranes, catalysts, bipolar plates, gas diffusion layers, air compressors, water pumps, and hydrogen pumps. key materials

and components.

Proton exchange membrane is the core component and key material of fuel cell. The role of the MEA membrane electrode

is to only allow hydrogen ions (protons) that have lost electrons from the anode to pass through the cathode, but prevent

electrons, hydrogen molecules, water molecules, etc. from passing through.

MEA Membrane electrode assembly (MEA), also translated into membrane electrode, is a key component in the development

of fuel cells. The membrane electrode and its bipolar plates on both sides constitute a single fuel cell cell, which is the basic

unit of a fuel cell. In practical applications, according to design requirements, multiple single cells can be combined into a fuel

cell reactor to meet power output requirements of different sizes.

The MEA membrane electrode forms a good electron channel. The carbon catalyst in the MEA is a good conductor of electrons,

but the presence of Nafion and PTFE will have a certain impact on the electrical conductivity. On the basis of satisfying the ion

and gas conduction, the electron conductivity should also be considered. Taken together to improve the overall performance of

the MEA. MEA membrane electrode membrane has high proton conductivity, can block hydrogen and oxygen well, prevent

mutual channeling, and has good chemical stability, thermal stability and hydrolysis.