气候变化领域集成服务门户(CCPortal): Beyond catalysis and membranes: Visualizing and solving the challenge of electrode water accumulation and flooding in AEMFCs

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DOI	10.1039/c8ee00122g
	Beyond catalysis and membranes: Visualizing and solving the challenge of electrode water accumulation and flooding in AEMFCs
	Omasta T.J.; Park A.M.; Lamanna J.M.; Zhang Y.; Peng X.; Wang L.; Jacobson D.L.; Varcoe J.R.; Hussey D.S.; Pivovar B.S.; Mustain W.E.
发表日期	2018
ISSN	17545692
起始页码	551
结束页码	558
卷号	11 期号:3
英文摘要	A majority of anion exchange membrane fuel cells (AEMFCs) reported in the literature have been unable to achieve high current or power. A recently proposed theory is that the achievable current is largely limited by poorly balanced water during cell operation. In this work, we present convincing experimental results-coupling operando electrochemical measurements and neutron imaging-supporting this theory and allowing the amount and distribution of water, and its impact on AEMFC performance, to be quantified for the first time. We also create new electrode compositions by systematically manipulating the ionomer and carbon content in the anode catalyst layer, which allowed us to alleviate the mass transport behavior limitations of H2/O2 AEMFCs and achieve a new record-setting peak power density of 1.9 W cm-2-a step-change to existing literature. Our efforts cast a new light on the design and optimization of AEMFCs-potentially changing the way that AEMFCs are constructed and operated. © The Royal Society of Chemistry 2018.
英文关键词	Alkaline fuel cells; Ion exchange membranes; Anion-exchange membrane fuel cells; Anode catalyst layer; Design and optimization; Distribution of water; Electrochemical measurements; Electrode composition; Peak power densities; Transport behavior; Electrodes; catalysis; catalyst; electrochemistry; electrode; experimental study; fuel cell; hydrogen; ion exchange; membrane; optimization; performance assessment
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190300
作者单位	Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States; Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, United States; National Renewable Energy Laboratory, Golden, CO 80401, United States; National Institute for Standards and Technology, Gaithersburg, MD 20899, United States; Department of Chemistry, University of Surrey, Guildford, GU2 7XH, United Kingdom
推荐引用方式 GB/T 7714	Omasta T.J.,Park A.M.,Lamanna J.M.,et al. Beyond catalysis and membranes: Visualizing and solving the challenge of electrode water accumulation and flooding in AEMFCs[J],2018,11(3).
APA	Omasta T.J..,Park A.M..,Lamanna J.M..,Zhang Y..,Peng X..,...&Mustain W.E..(2018).Beyond catalysis and membranes: Visualizing and solving the challenge of electrode water accumulation and flooding in AEMFCs.Energy & Environmental Science,11(3).
MLA	Omasta T.J.,et al."Beyond catalysis and membranes: Visualizing and solving the challenge of electrode water accumulation and flooding in AEMFCs".Energy & Environmental Science 11.3(2018).