| In-situ measurement of electrode kinetics in porous electrode for vanadium flow batteries using symmetrical cell design | |
| Zhang, Kaiyue1,2; Xiong, Jing1,2; Yan, Chuanwei1,2; Tang, Ao1,2 | |
| Corresponding Author | Tang, Ao(a.tang@imr.ac.cn) |
| 2020-08-15 | |
| Source Publication | APPLIED ENERGY
 |
| ISSN | 0306-2619 |
| Volume | 272Pages:11 |
| Abstract | 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. |
| Keyword | Vanadium flow battery In-situ measurement Electrode kinetics Porous electrode Symmetrical cell Finite element analysis |
| Funding Organization | National Natural Science Foundation of China ; Institute of Metal Research, Chinese Academy of Sciences |
| DOI | 10.1016/j.apenergy.2020.115093 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[21706266] ; National Natural Science Foundation of China[21805290] ; Institute of Metal Research, Chinese Academy of Sciences |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| WOS ID | WOS:000541163000004 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139382 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Tang, Ao |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China |
| Recommended Citation 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. |
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