气候变化领域集成服务门户(CCPortal): Protonic ceramic electrochemical cells for hydrogen production and electricity generation: Exceptional reversibility; stability; and demonstrated faradaic efficiency

CCPortal

DOI	10.1039/c8ee02865f
	Protonic ceramic electrochemical cells for hydrogen production and electricity generation: Exceptional reversibility; stability; and demonstrated faradaic efficiency
	Choi S.; Davenport T.C.; Haile S.M.
发表日期	2019
ISSN	1754-5692
起始页码	206
结束页码	215
卷号	12 期号:1
英文摘要	We demonstrate exceptional performance for steam electrolysis at intermediate temperatures (500-650 °C) using protonic ceramic electrolyte cells comprised of the proton-permeable, high-activity mixed conductor PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF) as the air electrode, the highly proton-conductive and chemically stable perovskite oxide BaZr 0.4 Ce 0.4 Y 0.1 Yb 0.1 O 3 (BZCYYb4411) as the electrolyte, and a composite of Ni-BZCYYb4411 as the fuel electrode. Cells constructed from this material set have been shown previously to function efficiently in fuel cell mode. We demonstrate here reversible operation, enabling hydrogen production when excess electricity is available and immediate electricity generation from stored hydrogen when power demand is high. The cells are stable under cyclic operation and also under prolonged continuous operation in electrolysis mode, undergoing minimal loss in electrochemical characteristics after 500 h at 550 °C. Microstructurally optimized cells yield a remarkable current density of -1.80 A cm -2 at 600 °C and an operating voltage of 1.3 V, of which, based on an electrochemically deduced faradaic efficiency of 76%, -1.37 A cm -2 contributes to useful hydrogen. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Barium compounds; Ceramic materials; Cerium compounds; Efficiency; Electric power generation; Electrodes; Electrolysis; Fuel cells; Iron compounds; Perovskite; Praseodymium compounds; Solid electrolytes; Strontium compounds; Ytterbium compounds; Yttrium compounds; Zirconium compounds; Ceramic electrolytes; Continuous operation; Electricity generation; Electrochemical characteristics; Faradaic efficiencies; Hydrogen production and electricity generations; Intermediate temperatures; Steam electrolysis; Hydrogen production; electricity generation; electrode; electrokinesis; electrolyte; electron; hydrogen; performance assessment; perovskite
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162416
作者单位	Materials Science and Engineering, Northwestern University, Evanston, IL, United States; Department of Mechanical Engineering, Kumoh National Institute of Technology, Gumi, South Korea
推荐引用方式 GB/T 7714	Choi S.,Davenport T.C.,Haile S.M.. Protonic ceramic electrochemical cells for hydrogen production and electricity generation: Exceptional reversibility; stability; and demonstrated faradaic efficiency[J],2019,12(1).
APA	Choi S.,Davenport T.C.,&Haile S.M..(2019).Protonic ceramic electrochemical cells for hydrogen production and electricity generation: Exceptional reversibility; stability; and demonstrated faradaic efficiency.Energy and Environmental Science,12(1).
MLA	Choi S.,et al."Protonic ceramic electrochemical cells for hydrogen production and electricity generation: Exceptional reversibility; stability; and demonstrated faradaic efficiency".Energy and Environmental Science 12.1(2019).