开发和评估基于基诺伯基的交联离子交换膜,以提高非水性氧化流电池效率
M Motiur Mazumder1,2, Hazel Gerber3, Paul A Kohl3
1Department of Chemistry and Biochemistry, Utah Tech University, St. George, Utah 84770, United States.
ACS applied materials & interfaces
|January 20, 2025
概括
新的多 (norbornene) 离子交换膜 (AEM) 显著提高了非水性氧化还原流电池的性能. 与商业选择相比,这些新型膜显示出更高的容量保留和更少的交叉.
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
- 聚合物科学 聚合物科学
背景情况:
- 非水性氧化还原流电池 (NARFB) 面临着分离材料的挑战,导致反应剂交叉和性能降低.
- 有效的离子交换膜 (AEM) 对于有效的NARFB运行至关重要,因为它可以控制离子运输并防止交叉.
研究的目的:
- 为NARFB应用合成和表征基于新型聚乙烯 (PNB) 的AEM.
- 评估这些PNB AEM在非水性氧化还原流电池中的性能,重点关注耐用性,离子透性,电阻和交叉减轻.
主要方法:
- 通过不同交叉连接剂度的丁甲基 (BuNB) 和丁甲基 (BrBuNB) 的共聚合合成PNB AEMs.
- 在NARFB中进行性能测试,包括循环稳定性,电荷载体透性,电池电阻测量,氧化还原活性分子交叉分析和机械性质评估.
- 与商用Fumasep膜 (FAPQ-375) 的比较分析.
主要成果:
- 在电池循环测试中,基于PNB的AEM在商用Fumasep膜上表现优越.
- 性能最高的PNB膜在1000个周期内实现了83%的容量保留,这归因于最小的交叉.
- 商用FAPQ-375膜的容量保留率显著降低 (28%) 由于高交叉.
结论:
- 基于PNB的AEM代表了提高NARFB效率和寿命的有希望的进步.
- 开发的膜有效地解决了交叉的关键问题,从而提高了电池的性能.
- 这些发现表明,开发下一代隔离器用于非水性能源存储系统的可行途径.
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