制备了一种基于磺化聚醚醚酮的复合膜,通过聚多巴胺将聚四氟乙烯纳米颗粒连接在复合膜表面进行改性。通过调控聚四氟乙烯纳米颗粒质量分数获得了一种高性能改性磺化聚醚醚酮复合膜。结果表明,该改性复合膜具有优越的离子选择性、良好的稳定性,在组装的全钒液流电池中,电流密度为100 mA/cm²时电池的库仑效率和能量效率分别高达99.2%和85.6%。聚四氟乙烯纳米颗粒对磺化聚醚醚酮膜的成功改性,证明其在全钒液流电池中具有广阔的应用前景。

A composite membrane based on sulfonated polyether ether ketone was prepared and modified by attaching polytetrafluoroethylene nanoparticles to its surface through polydopamine.By adjusting the mass fraction of PTFE nanoparticles,a high-performance composite membrane was obtained.The results indicate that the SPEEK composite membrane exhibits superior ion selectivity and good stability.In the assembled all-vanadium redox flow battery,the coulombic efficiency and energy efficiency reach as high as 99.2% and 85.6%,respectively,at a current density of 100 mA/cm2.The successful modification of the SPEEK membrane with PTFE nanoparticles demonstrates its promising potential for applications in vanadium redox flow batteries.

王体东(1998-),男,硕士生,研究方向为液流电池,wangtidong@sjtu.edu.cn;纪亚(1991-),女,博士,助理教授,研究方向为新能源储能和先进功能材料,通讯联系人,jiya@sjtu.edu.cn。