In-situ measurement of electrode kinetics in porous electrode for vanadium flow batteries using symmetrical cell design

doi:10.1016/j.apenergy.2020.115093

IMR OpenIR

	In-situ measurement of electrode kinetics in porous electrode for vanadium flow batteries using symmetrical cell design
	Zhang, Kaiyue 1,2; Xiong, Jing 1,2; Yan, Chuanwei 1,2; Tang, Ao 1,2
通讯作者	Tang, Ao(a.tang@imr.ac.cn)
	2020-08-15
发表期刊	APPLIED ENERGY
ISSN	0306-2619
卷号	272 页码:11
摘要	Electrode kinetics are crucial to electrochemical performance of vanadium flow battery. However, existing studies on electrode kinetics are mostly performed in ex-situ conditions based on planar electrodes, so the obtained rate constant can neither reflect the kinetics in practically used porous electrode nor be used to predict the activation polarizations of a real flow cell. To address this limitation, an in-situ measurement of electrode kinetics in porous electrode is conducted in this study by a symmetrical cell design for vanadium flow battery. For both V2+/V3+ and VO2+/VO2+ couples, the activation polarization as a function of current density is firstly acquired on the symmetrical cell through measurements of polarization curve, high frequency resistance and local mass transfer coefficient, followed by Tafel fitting that yields both rate constant and transfer coefficient. Based on kinetic parameters of both V2+/V3+ and VO2+/VO2+, the simulated full cell activation polarizations coincide well with the full cell experimental result. By further comparing to simulation results using reported kinetic parameters determined from planar electrodes, the reliability of the proposed method is further highlighted. The electrode evaluation is much more involved than Tafel polarization and stack design is not treated in this contribution.
关键词	Vanadium flow battery In-situ measurement Electrode kinetics Porous electrode Symmetrical cell Finite element analysis
资助者	National Natural Science Foundation of China ; Institute of Metal Research, Chinese Academy of Sciences
DOI	10.1016/j.apenergy.2020.115093
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[21706266] ; National Natural Science Foundation of China[21805290] ; Institute of Metal Research, Chinese Academy of Sciences
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000541163000004
出版者	ELSEVIER SCI LTD
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/139382
专题	中国科学院金属研究所
通讯作者	Tang, Ao
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Kaiyue,Xiong, Jing,Yan, Chuanwei,et al. In-situ measurement of electrode kinetics in porous electrode for vanadium flow batteries using symmetrical cell design[J]. APPLIED ENERGY,2020,272:11.
APA	Zhang, Kaiyue,Xiong, Jing,Yan, Chuanwei,&Tang, Ao.(2020).In-situ measurement of electrode kinetics in porous electrode for vanadium flow batteries using symmetrical cell design.APPLIED ENERGY,272,11.
MLA	Zhang, Kaiyue,et al."In-situ measurement of electrode kinetics in porous electrode for vanadium flow batteries using symmetrical cell design".APPLIED ENERGY 272(2020):11.