铁-铬液流电池电解液研究进展

Research progress of electrolyte of iron-chromium redox flow battery

铁-铬氧化还原液流电池是一种低成本、长寿命、适用于大规模长时储能的电化学储能技术。其电解液反应活性物质为Fe^(2+)/Fe^(3+)和Cr^(2+)/Cr^(3+)电对,通常采用盐酸作为支持电解质。电解液作为反应物质的载体,是整个储能系统的容量单元和重要组成部分,电解液的性能决定了储能系统运行的寿命、稳定性以及成本。从铁-铬液流电池电解液的理化性能研究与优化、析氢的缓解技术和容量恢复技术等方面对铁-铬液流电池电解液的研究进展进行了概括和总结,并对后续研究方向进行了思考和展望。

Fe-Cr redox flow battery is a kind of electrochemical energy storage technology,which is suitable for large-scale and long-time energy storage with low cost and long life.The electrolyte reactive substances are Fe^(2+)/Fe^(3+)and Cr^(2+)/Cr^(3+),which are usually supported by hydrochloric acid.As the carrier of reactants,the electrolyte is the capacity unit and important part of the energy storage system.The performance of electrolyte determines the life,stability and cost of the system.The research progress of the electrolyte of the iron-chromium redox flow battery was summarized from the aspects of the physical and chemical properties optimization,hydrogen evolution mitigation and capacity recovery technology.The future research direction was also discussed.