关键词: 燃料电池, 膜电极, 催化剂, 界面, 优化设计

Abstract:

As a green energy technology, fuel cell technology has great potential in reducing energy consumption and environmental pollution. Membrane electrode assembly (MEA) is the core component of proton exchange membrane fuel cell (PEMFC). The smooth work of electrochemical reaction in MEA requires the coordination of all the functional parts. The performance of the fuel cell is restricted by the function parts of MEA, such as mass transfer, conductivity, proton conduction, catalysis, etc. According to the preparation method, MEA can be divided into catalyst coated substrate (CCS)-type MEA, catalyst coated membrane (CCM)-type MEA, ordered MEA and integrated MEA. The performance of MEA is not only determined by the catalyst loading, but also influenced by its structure design and preparation process. In this paper, the common improvement methods in the preparation of MEA are introduced. The research progress of catalyst spraying, blading, slot die coating, Nafion content in catalyst slurry composition and solvent polarity selection, catalytic layer gradient, patterning of catalyst layer and improvement of interface structure, PEM structure enhancement, patterning and film-forming method are discussed. It should be noted that the design of catalytic layer/proton exchange membrane (PEM) interface and catalytic layer/gas diffusion layer (GDL) interface will also directly affect the performance of MEA.

Key words: fuel cells, membrane electrode assembly, catalyst, interface, optimal design