气候变化领域集成服务门户(CCPortal): Hierarchical electrode design of highly efficient and stable unitized regenerative fuel cells (URFCs) for long-term energy storage

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DOI	10.1039/d0ee03244a
	Hierarchical electrode design of highly efficient and stable unitized regenerative fuel cells (URFCs) for long-term energy storage
	Peng X.; Taie Z.; Liu J.; Zhang Y.; Peng X.; Regmi Y.N.; Fornaciari J.C.; Capuano C.; Binny D.; Kariuki N.N.; Myers D.J.; Scott M.C.; Weber A.Z.; Danilovic N.
发表日期	2020
ISSN	17545692
起始页码	4872
结束页码	4881
卷号	13 期号:12
英文摘要	The unitized regenerative fuel cell (URFC) is a promising electrochemical device for intermittent renewable energy storage in chemical bonds. However, widespread application has been hindered due to low round-trip efficiencies (RTEs) and disappointing durability, in particular at high rates. Here, we break through that barrier by demonstrating highly efficient, flexible, and stable URFCs via hierarchical design of the multiscale catalyst-layer structures. A more porous and less tortuous Pt and Ir catalyst layer is realized using a doctor blade fabrication method that significantly improves URFC performance. We demonstrate RTEs of 56% and 53% under constant-electrode and constant-gas mode, respectively, while operating at 1000 mA cm-2, and significantly, a RTE of 45% at 2000 mA cm-2, achievements that were previously viewed as unfeasible under the onerous demands of URFC operation. At the same time we demonstrate URFCs under both constant-electrode and constant-gas mode operated continuously for over 500 h with negligible degradation. These results demonstrate the viability of applying URFCs for long-term energy storage at previously unattainable efficiencies and cast new light on electrode design and optimization of URFCs. This journal is © The Royal Society of Chemistry.
英文关键词	Bond strength (chemical); Catalysts; Electrodes; Energy storage; Regenerative fuel cells; Catalyst layers; Doctor blade; Electrode design; Fabrication method; Hierarchical design; Renewable energy storages; Round trip; Unitized regenerative fuel cell (URFC); Fuel storage; design; electrode; energy efficiency; energy planning; energy storage; fuel cell; hierarchical system
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/189420
作者单位	Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Oregon State University, School of Mechanical, Industrial, and Manufacturing Engineering, Bend, OR 97701, United States; National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Departments of Materials Science and Engineering, University of California Berkeley, Berkeley, CA 94720, United States; Department of Chemistry, Manchester Metropolitan University, Manchester, M1 5GD, United Kingdom; Departments of Chemical Engineering, University of California Berkeley, Berkeley, CA 94720, United Kingdom; Nel Hydrogen/Proton Onsite, Wallingford, CT 06492, United States; Ballard Power Systems, Burnaby, BC V3N 5G2, Canada; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL 60439, United States
推荐引用方式 GB/T 7714	Peng X.,Taie Z.,Liu J.,et al. Hierarchical electrode design of highly efficient and stable unitized regenerative fuel cells (URFCs) for long-term energy storage[J],2020,13(12).
APA	Peng X..,Taie Z..,Liu J..,Zhang Y..,Peng X..,...&Danilovic N..(2020).Hierarchical electrode design of highly efficient and stable unitized regenerative fuel cells (URFCs) for long-term energy storage.Energy & Environmental Science,13(12).
MLA	Peng X.,et al."Hierarchical electrode design of highly efficient and stable unitized regenerative fuel cells (URFCs) for long-term energy storage".Energy & Environmental Science 13.12(2020).