Modulation of of the microstructure of the Ag/C-based alkaline cathode via the ionomer content for a bipolar membrane fuel cell

doi:10.1016/j.jpowsour.2017.04.006

	Modulation of of the microstructure of the Ag/C-based alkaline cathode via the ionomer content for a bipolar membrane fuel cell
	Xu, X; Huang, WX; Zhang, J; Gong, J; Huang WX(黄万霞); Lu, SF; Xiang, Y; Peng, SK
刊名	JOURNAL OF POWER SOURCES
	2017
卷号	354 页码:92-99
关键词	Bipolar membrane fuel cell Ag/C Cathode catalyst layer Ionomer content Nano-CT
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2017.04.006
文献子类	Article
英文摘要	Ag/C is evaluated as a cathode catalyst for a bipolar membrane fuel cell (BPMFC). The microstructure of the cathode catalyst layer is modulated via ionomer content, and the effects on BPMFC performance are studied. When the ionomer content is increased from 10 wt% to 30 wt%, the fuel cell performance is optimized at 19.3 mW/cm(2) with an ionomer content of 20 wt%. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) are conducted on the catalyst layer. EIS indicates that the charge transfer resistance is minimum, while CV suggests that the highest electrocatalytic activity of the catalyst is achieved with an ionomer content of 20 wt%. The microstructure of the catalyst layer is characterized using scanning electron microscopy (SEM) and nanometer-scale X-ray computed tomography (nano-CT). The SEM results show that excess ionomer cover on the surface of the catalyst, and the catalyst seems to form larger aggregates. Nano-CT, however, produces quite different results. The reconstructed 3D image of the catalyst layer reveals that the Ag/C catalyst tends to aggregate at low ionomer content. When the ionomer content is increased from 10 wt% to 30 wt%, the average diameter of the catalyst aggregation decreases from 313 nm to 210 nm. (C) 2017 Elsevier B.V. All rights reserved.
电子版国际标准刊号	1873-2755
WOS关键词	OXYGEN REDUCTION REACTION ; RAY COMPUTED-TOMOGRAPHY ; OPTIMUM NAFION CONTENT ; CATALYST LAYER ; NM-RESOLUTION ; ELECTROLYTE ; PERFORMANCE ; CARBON ; MEDIA ; ANION
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
WOS记录号	WOS:000401686100012
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284844]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Xu, X,Huang, WX,Zhang, J,et al. Modulation of of the microstructure of the Ag/C-based alkaline cathode via the ionomer content for a bipolar membrane fuel cell[J]. JOURNAL OF POWER SOURCES,2017,354:92-99.
APA	Xu, X.,Huang, WX.,Zhang, J.,Gong, J.,黄万霞.,...&Peng, SK.(2017).Modulation of of the microstructure of the Ag/C-based alkaline cathode via the ionomer content for a bipolar membrane fuel cell.JOURNAL OF POWER SOURCES,354,92-99.
MLA	Xu, X,et al."Modulation of of the microstructure of the Ag/C-based alkaline cathode via the ionomer content for a bipolar membrane fuel cell".JOURNAL OF POWER SOURCES 354(2017):92-99.