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吡啶型部分氟化含金刚烷结构聚芳醚膜的制备及钒液流电池性能研究

作者：张欣妍，张本贵，姜思男，庞欣雨，李涛，杨余超，张凇玮

单位：沈阳化工大学化学工程学院，沈阳 110142

关键词：钒液流电池；离子交换膜；金刚烷；全氟联苯；吡啶

DOI号： 10.16159/j.cnki.issn1007-8924.2025.06.003

分类号： TQ150

出版年,卷(期):页码： 2025,45(6):26-35

摘要：

钒液流电池(VRFB)具有高本征安全性、容量和功率解耦，在大规模储能领域中显示出很好的应用前景。膜作为VRFB的关键部件对电池性能具有重要影响，现有用于VRFB的膜或价格昂贵或离子传导性有待提升，因此开发新型低成本高性能的膜材料具有重要意义。本研究合成了部分氟化含金刚烷结构聚芳醚，进一步接枝功能化引入吡啶基团，经过溶胀诱导微相分离，获得了吡啶型部分氟化含金刚烷结构聚芳醚膜(PyAPEF)。PyAPEF膜呈现低面电阻(0.13Ω·cm2,与Nafion 212 膜相当)、低溶胀率和高机械强度（>46.42 MPa），优于Nafion 212膜（机械强度17.0 MPa）。在200 mA/cm2下，PyAPEF-140膜在VRFB测试中表现出优秀的能量效率（EE=84.59%），高于Nafion 212膜的EE(80.37%)。此外，PyAPEF-100膜在1 000次循环测试中表现出稳定的电池性能，显示出良好的膜稳定性。本研究制备的PyAPEF膜在VRFB中具有优异的电池效率，在钒液流电池中具有良好应用前景。

Vanadium redox flow battery (VRFB) has high intrinsic safety, capacity and power decoupling, and shows good application prospects in the field of large-scale energy storage. As a key component of VRFB, membranes have an important impact on battery performance. Existing membranes used for VRFB are either expensive or have poor ion conductivity. Therefore, it is of great significance to develop new low-cost and high-performance membrane materials. In this study, partially fluorinated adamantane-containing poly(aryl ether) was synthesized, and pyridine groups were further grafted and functionalized. After swelling-induced microphase separation, PyAPEF membranes were obtained. PyAPEF membrane showed low area resistance (0.13 Ω·cm2), low swelling ratio, and high mechanical strength (>46.42 MPa), which was better than Nafion 212 membrane (area resistance 0.13 Ω·cm2, mechanical strength 17.0 MPa). At a current density of 200 mA/cm2, the PyAPEF-140 membrane showed excellent energy efficiency (EE=84.59%) in the VRFB test, which was higher than that of the Nafion 212 membrane (EE=80.37%). In addition, the PyAPEF-100 membrane showed stable battery performance in 1 000-cycle tests, showing good membrane stability. The PyAPEF membrane prepared in this study achieved excellent battery efficiency in VRFB and has good application prospects in vanadium redox flow battery.

基金项目：

国家自然科学基金项目(21706164); 辽宁省自然科学基金面上项目(2023-MS-236); 辽宁省教育厅重点攻关项目(LJKZZ20220056)

作者简介：

张欣妍（2000-），女，辽宁朝阳人，硕士研究生，主要研究方向为钒液流电池用离子交换膜.

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