1. High-rate, two-electron-transfer vanadium-hydrogen gas battery.
- Author
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Zhang, Kai, Zheng, Xinhua, Liu, Shuang, Xie, Zehui, Liu, Zaichun, Zhu, Zhengxin, Jiang, Taoli, Wang, Weiping, Wang, Mingming, Ma, Yirui, Meng, Yahan, Peng, Qia, and Chen, Wei
- Subjects
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ELECTRIC batteries , *ENERGY storage , *ENERGY density , *OXIDATION-reduction reaction , *GASES , *ENERGY consumption - Abstract
Aqueous rechargeable hydrogen gas batteries have low cost and high safety, which are expected to be used in large-scale energy storage. Here, we design a novel static vanadium-hydrogen gas (V-H) battery by pairing V3+/VO 2 + liquid redox cathode with the hydrogen gas anode. The two-electron reactions between V3+ and VO 2 + in static hydrogen gas batteries is reported for the first time. The V-H battery has a volumetric capacity of 18.1 Ah/L and an energy efficiency of 61 % at a high current density of 500 mA/cm2. Moreover, it achieves a high capacity retention of 80 % after 900 cycles and an energy density of 22.6 Wh/L at 300 mA/cm2. Finite element simulation proves excellent reversibility of the anode HER/HOR reactions and cathode V3+/VO 2 + redox reactions. This study sheds light on the development of cost-effective, high-energy density, long cycle life, liquid-phase cathode hydrogen batteries for large-scale energy storage applications. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2023
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