The influence of zinc electrode substrate, electrolyte flow rate and current density on zinc-nickel flow cell performance

doi:10.1016/j.electacta.2021.137890

	The influence of zinc electrode substrate, electrolyte flow rate and current density on zinc-nickel flow cell performance
	Trudgeon, David P.3; Loh, Adeline 3; Ullah, Habib 3; Li, Xiaohong 3; Yufit, Vladimir 1; Brandon, Nigel 1; Liu, Maocheng 2; Kong, Lingbin 2
刊名	ELECTROCHIMICA ACTA
	2021
卷号	373
关键词	Electrolyte additive Redox flow battery Zinc electrode Zinc electrodeposition
ISSN号	0013-4686
DOI	10.1016/j.electacta.2021.137890
英文摘要	This work aims to identify a suitable material for use as a zinc electrode substrate material in alkaline media, then employ this to study the effect of electrolyte flow rate and current density on zinc-nickel flow cell performance. Three metallic and four graphite composite materials are investigated, with the coulombic efficiency of zinc electrode charge / discharge cycling found to increase as hydrogen evolution onset potentials become more negative. A graphite / PVDF composite substrate demonstrates the highest coulombic efficiency at 96.7% and the most negative hydrogen evolution onset potential at -1.595 V vs. Hg/HgO. Using this material, the effect of electrolyte flow rate and current density on a zinc-nickel flow cell is investigated. Zinc morphology and flow cell performance is related to the ratio of applied current density to limiting current density. At values between 0.47 and 1, boulder type zinc morphologies occur, with smooth and compact zinc deposits resulting from current density ratios of 0.39 and below. Stable zinc-nickel flow cell performance is achieved over 200 cycles with coulombic, voltaic and energy efficiencies of 98.3, 88.1 and 86.6%, respectively, at a current density of 20 mA cm(-2). (C) 2021 Elsevier Ltd. All rights reserved.
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000621259000014
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147419]
专题	材料科学与工程学院
作者单位	1.Imperial Coll London, Dept Earth Sci & Engn, London SW7 2AZ, England; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China 3.Univ Exeter, Coll Engn Math & Phys Sci, Renewable Energy Grp, Penryn Campus, Penryn TR10 9FE, Cornwall, England;
推荐引用方式 GB/T 7714	Trudgeon, David P.,Loh, Adeline,Ullah, Habib,et al. The influence of zinc electrode substrate, electrolyte flow rate and current density on zinc-nickel flow cell performance[J]. ELECTROCHIMICA ACTA,2021,373.
APA	Trudgeon, David P..,Loh, Adeline.,Ullah, Habib.,Li, Xiaohong.,Yufit, Vladimir.,...&Kong, Lingbin.(2021).The influence of zinc electrode substrate, electrolyte flow rate and current density on zinc-nickel flow cell performance.ELECTROCHIMICA ACTA,373.
MLA	Trudgeon, David P.,et al."The influence of zinc electrode substrate, electrolyte flow rate and current density on zinc-nickel flow cell performance".ELECTROCHIMICA ACTA 373(2021).