全钒液流电池废旧电解液的恢复再生利用
Recovery and regeneration of waste electrolyte from all-vanadium redox flow battery
彭海泉 1徐家彬 2游润晨 3赵丽娜 1胡显龙2
作者信息
- 1. 中国科学院金属研究所,辽宁沈阳 110016
- 2. 江苏深储新材料有限公司,江苏南通 226499
- 3. 盐城阿特斯阳光能源科技有限公司,江苏盐城 224007
- 折叠
摘要
全钒氧化还原液流电池是一种电化学储能装置,由于将能量存储于电解液中,功率和容量相互独立,在大规模储能领域具有突出优势,但电池废旧电解液的回收处理是一个难题.电化学测试和电解液成分分析表明:废旧电解液的活性并未明显下降,恢复的着眼点应是电解液价态的综合调节.提出四种电解液恢复方法,最佳比例恢复法、直接电解法、硫酸电解法和不对称电极法分别将电解液容量恢复至初始状态的75％、92％、93％、92％,并且电池库伦效率保持在95％～98％,表现出良好的充放电性能.该研究有利于促进钒资源的综合利用,并对全钒液流电池的应用和运行维护具有重要指导意义.
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 recov-ery methods,the optimal proportion recovery method,direct electrolysis method,sulfuric acid electro-lysis 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 applica-tion and operation maintenance of vanadium flow batteries.
关键词
钒电池/电解液/回收/再生/最佳比例恢复法/直接电解法/硫酸电解法/不对称电极法Key words
vanadium flow battery/electrolyte/recovery/regeneration/optimal proportion recovery method/direct electrolysis method/sulfuric acid electrolysis method/asymmetric electrode method引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据