储能科学与技术 ›› 2021, Vol. 10 ›› Issue (4): 1305-1310.doi: 10.19799/j.cnki.2095-4239.2021.0050

• 储能材料与器件 • 上一篇    下一篇

磺化聚醚醚酮基两性离子交换膜制备及在铁-铬液流电池中的应用

张蓉1(), 王曙光1(), 孙璇1, 江小松1, 胡磊2, 焉晓明2, 贺高红2   

  1. 1.国家电投集团科学技术研究院有限公司,北京 102209
    2.大连理工大学,辽宁 大连 116024
  • 收稿日期:2021-02-02 修回日期:2021-02-27 出版日期:2021-07-05 发布日期:2021-06-25
  • 通讯作者: 王曙光 E-mail:zhangrong@spic.com.cn;wangshuguang@spic.com.cn
  • 作者简介:张蓉(1987—),女,硕士,工程师,主要研究方向为膜科学与技术,E-mail:zhangrong@spic.com.cn
  • 基金资助:
    基?金?项?目?:基金项目:北京市科技计划项目(Z191100004619008);国家电投集团科学技术研究院有限公司B类课题(B-ZY05-201802)

Preparation of sulfonated polyether ether ketone amphoteric ion exchange membrane and its application in iron-chromium redox flow battery

Rong ZHANG1(), Shuguang WANG1(), Xuan SUN1, Xiaosong JIANG1, Lei HU2, Xiaoming YAN2, Gaohong HE2   

  1. 1.State Power Investment Corporation Research Institute, Beijing 102209, China
    2.Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2021-02-02 Revised:2021-02-27 Online:2021-07-05 Published:2021-06-25
  • Contact: Shuguang WANG E-mail:zhangrong@spic.com.cn;wangshuguang@spic.com.cn

摘要:

针对铁-铬液流电池用的离子交换膜需求,通过在磺化聚醚醚酮(SPEEK)中引入了高亲水性聚乙烯亚胺(PEI)构建离子交联形成高效氢键网络,制备了两性离子交换膜(SPEEK/PEI)。通过引入胺基来构建离子交联结构,有效降低了SPEEK膜的溶胀度,抑制了铁-铬离子渗透;同时膜中亲水的PEI促进了亲水通道的形成,保持了高质子传导率。基于膜中高效氢键网络,SPEEK/PEI膜实现了铁-铬液流电池库仑效率与能量效率的有效提升。在70 mA/cm2电流密度下铁-铬液流电池性能测试中,SPEEK/PEI 3%膜的库仑效率为96.5%,能量效率达到79.4%。

关键词: 铁铬液流电池, 离子选择性, 磺化聚醚醚酮, 聚乙烯亚胺,

Abstract:

An amphoteric ion-exchange membrane (SPEEK/PEI) was prepared in accordance with the demand for the Fe-Cr redox flow battery. An efficient hydrogen bond network was formed by introducing highly hydrophilic polyethyleneimine (PEI) into poly(ether ether ketone) (SPEEK). By introducing PEI with an amino group, the swelling ratio of the SPEEK membrane was effectively reduced, and the permeability of Fe2+ and Cr3+ was inhibited. Furthermore, high proton conductivity was maintained owing to the formation of hydrophilic channels by PEI. Based on the efficient hydrogen bonding network, SPEEK/PEI membranes can effectively improve the Coulombic efficiency and energy efficiency of Fe-Cr redox flow batteries. The Coulombic efficiency of a 3% SPEEK/PEI membrane was 96.5%, and energy efficiency was 79.4% in the performance testing of the Fe-Cr redox flow battery at an ampere density of 70 mA/cm2.

Key words: iron-chromium redox flow battery, ion selectivity, sulfonated poly(ether ether ketone), polyacetimide, membrane

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