一种全钒液流电池用高稳定性电解液及其制备方法
By using polar solvents and pyrrole as stabilizers in vanadium redox flow batteries, combined with a mixed acid system and inorganic additives, the problems of electrolyte solidification and vanadium ion precipitation and crystallization were solved, enabling stable operation and efficient energy storage of the battery in low-temperature environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN YINFENG NEW ENERGY CO LTD
- Filing Date
- 2026-04-07
- Publication Date
- 2026-07-17
AI Technical Summary
Vanadium redox flow batteries are prone to electrolyte solidification and vanadium ion precipitation and crystallization in sub-zero temperature environments, which affects battery performance and may cause blockage, limiting their application in low-temperature environments.
Polar solvents and pyrrole are used as stabilizers. The freezing point of the electrolyte is lowered by the interaction of polar molecules with hydrogen bonds. The viscosity of the electrolyte and the dispersion of vanadium ions are improved by the solubility of pyrrole and the formation of polymers. Combined with mixed acid system and inorganic additives, the dissolution balance and conductivity of vanadium ions are maintained.
It effectively broadens the normal operating temperature range of the vanadium redox flow battery, improves the battery's low-temperature stability and charge/discharge speed, enhances the battery's energy storage efficiency and cycle performance, and ensures that the electrolyte remains free from precipitation or solidification for more than 60 days at -20℃.
Smart Images
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