Abstract:

The energy storage technology of liquid flow has the characteristics of high safety, high efficiency, long life, and environmental friendly. It is suitable for large-scale energy storage and distributed energy storage. Ion conducting membrane is one of key materials of a flow battery, upon which the properties and cost of ion conducting membranes directly affect the performance and cost of flow batteries. Among various ion conducting membranes, the compositions and structures of the selective layers and porous supporting layers of composite ion conducting membranes can be adjusted independently. Thus, composite membranes can exhibit high selectivity, high conductivity and high stability at the same time, which have been widely investigated and utilized in flow batteries. Moreover, by tuning the structures of the selective layers of composite membranes, their selectivity and conductivity can be further optimized, then improving the performance and lifespan of flow batteries. Therefore, this review will summarize the structure adjustment strategies of the selective layers of porous composite membranes based on their research progress in flow batteries, providing the theoretical instructions for the further development of ion conducting membranes in flow batteries.

Key words: renewable energy, separation, flow battery, composite ion conducting membrane

摘要：

液流电池储能技术具有安全性高、效率高、寿命长、环境友好等特点，适用于大规模储能和分布式储能。离子传导膜是液流电池的关键材料之一，其性质和成本直接影响着液流电池的性能和成本。复合离子传导膜选择层和多孔支撑层的组成和结构可以分别调控，可以兼具高选择性、高传导性和高稳定性，目前已经在液流电池中得到广泛的研究和应用。此外，通过对复合膜选择层结构的调控，其选择性和传导性等性能可以得到进一步优化，从而提升液流电池的性能和寿命。本综述基于液流电池用复合膜的研究进展，总结不同的基于多孔支撑层的多孔复合膜选择层的结构调控策略，为液流电池用离子传导膜的进一步发展提供理论指导。

关键词: 再生能源, 分离, 液流电池, 复合离子传导膜