Recovery and regeneration of waste electrolyte from all-vanadium redox flow battery

Peng Haiquan; Xu Jiabin; You Runchen; Zhao Lina; Hu Xianlong

doi:10.7513/j.issn.1004-7638.2024.03.002

Volume 45 Issue 3

Jul. 2024

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Peng Haiquan, Xu Jiabin, You Runchen, Zhao Lina, Hu Xianlong. Recovery and regeneration of waste electrolyte from all-vanadium redox flow battery[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 9-15. doi: 10.7513/j.issn.1004-7638.2024.03.002

Citation:

Peng Haiquan, Xu Jiabin, You Runchen, Zhao Lina, Hu Xianlong. Recovery and regeneration of waste electrolyte from all-vanadium redox flow battery[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 9-15. doi: 10.7513/j.issn.1004-7638.2024.03.002

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Recovery and regeneration of waste electrolyte from all-vanadium redox flow battery

doi: 10.7513/j.issn.1004-7638.2024.03.002

1.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
2.
Jiangsu Shenchu New Materials Co., Ltd., Nantong 226499, Jiangsu, China
3.
Yancheng Ates Sunshine Energy Technology Co., Ltd., Yancheng 224007, Jiangsu, China

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Received Date: 2024-03-28
Publish Date: 2024-07-02

Abstract

Abstract

Vanadium flow battery is an electrochemical energy storage device. As energy is stored in the electrolyte, power and capacity are independent of each other, which has outstanding advantages in the field of large-scale energy storage. However, the recovery and treatment of the used electrolyte of the battery is a challenge. Electrochemical tests and electrolyte composition analysis showed that the activity of the waste electrolyte did not decrease significantly, and the focus of recovery should be the comprehensive adjustment of the electrolyte valence state. This paper proposes four electrolyte recovery methods, the optimal proportion recovery method, direct electrolysis method, sulfuric acid electrolysis method and asymmetric electrode method, which can restore the electrolyte capacity to 75%, 92%, 93%, 92% of the initial state, respectively, and the coulombic efficiency of the battery is maintained at 95%~98%, showing good charge and discharge performance. This study is conducive to promoting the comprehensive utilization of vanadium resources and has important guiding significance for the application and operation maintenance of vanadium flow batteries.
- vanadium flow battery,
- electrolyte,
- recovery,
- regeneration,
- optimal proportion recovery method,
- direct electrolysis method,
- sulfuric acid electrolysis method,
- asymmetric electrode method

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References(16)

References

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