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一种具有灵活多衍生物的高性能聚胺复合膜,用于回氧流电池

Gang Wang¹, Yangtian Jing¹, Yan Yu¹

¹College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China.

ACS applied materials & interfaces

|November 8, 2024

概括

结合硫化聚胺 (S-F-abSPI) 和聚酸 (PFMPP) 的新复合膜显示出增强的质子导电性和稳定性. S-F-abSPI/1% PFMPP复合膜对高性能氧化还原流电池具有前景.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
聚合物化学聚合物化学

背景情况:

硫化聚胺是质子交换膜的关键材料.
提高质子导电性和稳定性对于先进的储能器件至关重要.
氧化还原流电池 (VRFB) 需要具有高离子选择性和耐久性的膜.

研究的目的:

为VRFB应用设计和合成新型复合膜.
为了研究聚酸 (PFMPP) 修改对硫化聚胺 (S-F-abSPI) 膜的影响.
评估开发的复合膜的电化学性能和稳定性.

主要方法:

用硫酸侧链和PFMPP合成S-F-abSPI.
制造具有不同比例的S-F-abSPI/PFMPP复合膜.
膜性质的表征,包括质子导电性,表面电阻和机械强度.
电化学测试VRFB性能 (电压效率,能源效率,循环稳定性).
电静电位分布的计算分析,以了解相互作用.

主要成果:

该S-F-abSPI膜实现了0.116 S cm-1的质子导电性,超过了N212膜.
该S-F-abSPI/1%的PFMPP复合膜表现出最佳性能,表面阻力低 (0.54 Ω cm2).
高压效率 (83.12%) 和能源效率 (81.95%) 在200 mA cm-2.2 时实现.
在200个循环中证明了卓越的长期循环稳定性.
纳入PFMPP提高了机械强度,降低了离子透性,提高了选择性.

结论:

该S-F-abSPI/PFMPP复合膜为VRFB提供了卓越的综合性能.
硫酸侧链有助于增强质子导电性.
强烈的PFMPP和S-F-abSPI之间的相互作用提高了膜耐用性和离子选择性.
这种新型复合膜是高性能氧还原流电池应用的有希望的候选者.

关键词:

聚胺是什么? 聚胺是什么?VRFBB VRFBB VRFBB VRFB VRFB VRFB VRFB VRFB VRF 复合膜是复合膜的一种.聚[4-甲基基 (4-基基) 酸] (PFMPP) 的使用.瓦纳氧化还原流电池的电池流量

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