Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells

doi:10.1007/s11708-021-0733-4

	Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells
	Dafalla, Ahmed Mohmed 1,2; Jiang, Fangming 1
刊名	FRONTIERS IN ENERGY
	2021-04-10
页码	13
关键词	cold start energy conversion fuel cells mesoscale morphology tortuosity water management
ISSN号	2095-1701
DOI	10.1007/s11708-021-0733-4
通讯作者	Jiang, Fangming(fm_jiang2000@yahoo.com)
英文摘要	Water transport is of paramount importance to the cold start of proton exchange membrane fuel cells (PEMFCs). Analysis of water transport in cathode catalyst layer (CCL) during cold start reveals the distinct characteristics from the normal temperature operation. This work studies the effect of CCL mesoscopic poremorphology on PEMFC cold start. The CCL mesoscale morphology is characterized by two tortuosity factors of the ionomer network and pore structure, respectively. The simulation results demonstrate that the mesoscale morphology of CCL has a significant influence on the performance of PEMFC cold start. It was found that cold-starting of a cell with a CCL of less tortuous mesoscale morphology can succeed, whereas starting up a cell with a CCL of more tortuous mesoscale morphology may fail. The CCL of less tortuous pore structure reduces the water back diffusion resistance from the CCL to proton exchange membrane (PEM), thus enhancing the water storage in PEM, while reducing the tortuosity in ionomer network of CCL is found to enhance the water transport in and the water removal from CCL. For the sake of better cold start performance, novel preparation methods, which can create catalyst layers of larger size primary pores and less tortuous pore structure and ionomer network, are desirable.
资助项目	National Key Research and Development Project[2018YFB0905303] ; Shanghai Automotive Industry Sci-Tech Development Foundation[1706]
WOS研究方向	Energy & Fuels
语种	英语
出版者	HIGHER EDUCATION PRESS
WOS记录号	WOS:000637478100001
资助机构	National Key Research and Development Project ; Shanghai Automotive Industry Sci-Tech Development Foundation
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/32962]
专题	中国科学院广州能源研究所
通讯作者	Jiang, Fangming
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Lab Adv Energy Syst,Guangdong Key Lab New & Renew, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Dafalla, Ahmed Mohmed,Jiang, Fangming. Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells[J]. FRONTIERS IN ENERGY,2021:13.
APA	Dafalla, Ahmed Mohmed,&Jiang, Fangming.(2021).Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells.FRONTIERS IN ENERGY,13.
MLA	Dafalla, Ahmed Mohmed,et al."Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells".FRONTIERS IN ENERGY (2021):13.