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Altering membrane structure to enhance water permeability and performance of anion exchange membrane fuel cell

Science China(Technological Sciences) 2021年第2期64卷 414-422页

作者： YANG Yue GAO XueQiang SONG Wei YU HongMei LI WenBin QI ManMan HUANG He WANG PengHao FAN ZhiXuan SHAO ZhiGang Fuel Cell System and Engineering Laboratory Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China School of Automotive Studies Tongji UniversityShanghai 201804China

Water management has been proven significant for enhancing both performance and durability of anion exchange membrane fuel cell. Besides searching new material, decreasing membrane thickness and modifying operation parameters, a simple and universal method of altering membrane structure is proposed in this work. Composite membranes made by unique processing method that includes both casting and electrospinning processes were compared with traditional casting membrane, all with the same thickness of 40 μm. Comparing to traditional casting membrane, the composite membrane put at proper position shows a higher water permeability, thus even more than 50% enhancement of the peak performance.

关键词： aemfc water management membrane structure electrospinning water permeation

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Recent advances in alkaline hydrogen oxidation reaction

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Journal of Energy Chemistry 2022年第3期31卷 107-122,I0004页

作者： Lixin Su Dan Gong Yiming Jin Dean Wu Wei Luo College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072HubeiChina Suzhou Institute of Wuhan University Suzhou 215123JiangsuChina

The development of highly efficient electrocatalysts toward hydrogen oxidation reaction(HOR)under alkaline media is essential for the commercialization of alkaline exchange membrane fuel cells(aemfcs).However,the HOR kinetics in alkaline is two to three orders of magnitude slower than that in *** critically,fundamental understanding of the sluggish kinetics derived from the p H effect is still *** this review,the recent development of understanding HOR mechanism and rational design of advanced HOR electrocatalysts are ***,recent advances in the theories focusing on fundamental understandings of HOR under alkaline electrolyte are comprehensively ***,from the aspect of intermediates binding energy,optimizing hydrogen binding energy(HBE)and increasing hydroxyl binding energy(OHBE),the strategies for designing efficient alkaline HOR catalysts are *** last,perspectives for the future research on alkaline HOR are pointed out.

关键词： Hydrogen oxidation reaction Hydrogen evolution reaction Alkaline electrolyte aemfc Binding energy

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