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Redox Targeting-Based Vanadium Redox-Flow Battery AITranslate

Yuanhang Cheng; Xun Wang; Songpeng Huang; Widitha Samarakoon; Shibo Xi; Ya Ji; Hang Zhang; Feifei Zhang; Yonghua Du; Zhenxing Feng; Stefan Adams; Qing Wang;
National University of Singapore; National University of Singapore; National University of Singapore; Oregon State University;Institute of Chemical and Engineering Sciences; National University of Singapore; National University of Singapore; National University of Singapore;Institute of Chemical and Engineering Sciences; Oregon State University; National University of Singapore; National University of Singapore
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Abstract AITranslate

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.

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DOI：https://doi.org/10.1021/acsenergylett.9b01939

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Citation Information:

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.

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GB/T 7714-2015 [1] Yuanhang Cheng, Xun Wang, Songpeng Huang, et al. ACS Energy Letters, 2019(4). DOI:10.1021/acsenergylett.9b01939.
MLA [1] Yuanhang Cheng, et al., ACS Energy Letters, no. 4, 2019, https://doi.org/10.1021/acsenergylett.9b01939.
APA [1] Yuanhang Cheng, Xun Wang, Songpeng Huang, Widitha Samarakoon, Shibo Xi, Ya Ji, Hang Zhang, Feifei Zhang, Yonghua Du, Zhenxing Feng, Stefan Adams, & Qing Wang. (2019). ACS Energy Letters(4). https://doi.org/10.1021/acsenergylett.9b01939
IEEE [1] Yuanhang Cheng, Xun Wang, Songpeng Huang, Widitha Samarakoon, Shibo Xi, Ya Ji, Hang Zhang, Feifei Zhang, Yonghua Du, Zhenxing Feng, Stefan Adams, and Qing Wang, ACS Energy Letters, no. 4, 2019, doi: 10.1021/acsenergylett.9b01939.