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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Advanced Materials for Energy Conversion and Storage 2022
Presentation Title D-8: Study on a Short Process Method for Preparation of 3.5 Valence Vanadium Electrolyte
Author(s) Zhengtuan Li, Lanjie Li, Heli Wan
On-Site Speaker (Planned) Zhengtuan Li
Abstract Scope This study reports on the preparation of high-purity electrolyte containing vanadium of 3.5+. It can be realized in a short process to prepare the electrolyte of the all-vanadium redox flow battery through the optimization of different parameters. The results show that a sample with stable reduction valence (V: 3.5+) can be obtained when vanadium pentoxide is used as the raw material, the reducing gas volume ratio is N2: CO: H2 = 80: 17: 3, and the reduction temperature and time are controlled at 700℃ and 2h, respectively. In addition, the concentration of sulfuric acid 4M is selected as the reaction solution, and the vanadium ion concentration of the electrolyte solution is between 1.5-1.6. The single cell made of vanadium electrolyte can run stably for 500 hours, charge and discharge 100 times, and basically maintain energy efficiency at around 82%. It has very good industrial application prospects.
Proceedings Inclusion? Planned:
Keywords Other, Other, Other

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