离子交换膜界面结构对膜电极性能影响的研究进展

Recent progress in patterning ion exchange membrane interface for membrane electrode assembly

燃料电池对我国能源转型具有深刻影响,膜电极(MEA)是其核心部件,对电化学装备性能起着决定性作用.其中,离子交换膜与催化层(CL)间的界面结构,直接影响MEA中反应与传质耦合过程.围绕离子交换膜的多种界面调控方法,及其在燃料电池中的应用展开论述,重点介绍了图案化离子交换膜、多孔离子交换膜和直接膜沉积3种技术途径.同时,通过分析离子交换膜界面结构对MEA性能的影响规律,阐述“界面结构传质特性膜电极性能”的关系.最后,对离子交换膜用于新型水电解制氢过程及未来发展进行展望.

Fuel cells for hydrogen production have significant impact on energy conversion and storage.As a core component,membrane electrode assembly(MEA)plays an important role in the electrochemical device performance.The interface between ion exchange membrane and catalyst layer(CL)has obvious influence upon the electrochemical reactions and mass transfer in MEA.This study reviews various approaches for patterning surface of ion exchange membranes,and their applications in fuel cell and water electrolysis processes.The approaches of ion exchange membrane interface engineering were mainly classified into three catalogues,including patterned membranes,porous membranes and direct membrane deposition.Then,the impact of the interface structure on the MEA performance was analyzed,and the relationship among“interface structure-mass transfer-MEA performance”was discussed.Finally,the perspective of future membrane researches for MEA applications in energy conversion and storage field was proposed.