Please use this identifier to cite or link to this item: https://doi.org/10.1021/acsenergylett.9b01939
Title: Redox Targeting-Based Vanadium Redox-Flow Battery
Authors: Cheng, Yuanhang 
Wang, Xun
Huang, Songpeng 
Samarakoon, Widitha
Xi, Shibo
Ji, Ya
Zhang, Hang
Zhang, Feifei 
Du, Yonghua
Feng, Zhenxing
Adams, Stefan 
Wang, Qing 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Electrochemistry
Energy & Fuels
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
POSITIVE ELECTROLYTE
PRUSSIAN BLUE
ADDITIVES
Issue Date: 1-Dec-2019
Publisher: AMER CHEMICAL SOC
Citation: Cheng, Yuanhang, Wang, Xun, Huang, Songpeng, Samarakoon, Widitha, Xi, Shibo, Ji, Ya, Zhang, Hang, Zhang, Feifei, Du, Yonghua, Feng, Zhenxing, Adams, Stefan, Wang, Qing (2019-12-01). Redox Targeting-Based Vanadium Redox-Flow Battery. ACS ENERGY LETTERS 4 (12) : 3028-3035. ScholarBank@NUS Repository. https://doi.org/10.1021/acsenergylett.9b01939
Abstract: Copyright © 2019 American Chemical Society. The low energy density and narrow operating temperature window besides the relatively high cost of the vanadium redox-flow battery (VRB) severely hinder its commercial deployment. Herein, in conjunction with low-concentration VO2+/VO2+ catholyte, we introduce a redox targeting-based VRB (RT-VRB) system in which a Prussian blue analogue (PBA), (VO)6[Fe(CN)6]3, is employed as a capacity booster to address the above issues. The charges are reversibly stored in the PBA loaded in the cathodic tank via a redox-targeting reaction with the VO2+/VO2+. Therefore, the concentration of catholyte has been reduced to 0.6 M without sacrificing the capacity. This provides ample room to broaden the operating temperature window of a RT-VRB relative to a conventional VRB. The theoretical volumetric capacity of the PBA could reach 135 Ah/L, which is more than 3 times that of VRB. We anticipate that the RT-VRB system demonstrated here would give credible impetus for VRB chemistry for robust and high-density energy storage applications.
Source Title: ACS ENERGY LETTERS
URI: https://scholarbank.nus.edu.sg/handle/10635/169700
ISSN: 23808195
DOI: 10.1021/acsenergylett.9b01939
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