含磺酸共价有机框架和聚合物掺杂的聚苯并咪唑膜增强钒氧化还原液流电池性能

IF 8.2 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Beyadgalem Endawoke Anley, Cheng-Ju Yu, Tsung-Yun Wu, Chun-Chiang Huang, Jun-Sheng Wang and Hsieh-Chih Tsai*, 
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引用次数: 0

摘要

钒氧化还原液流电池(VRFBs)中聚苯并咪唑(PBI)基膜具有优异的离子选择性,从而实现了较高的库仑效率;然而,由于质子输运受限,它们的能量效率仍然相对较低。基于共价有机框架(COF)和聚合物(COP)的质子选择膜已经被开发出来,以解决质子渗透率和选择性之间的权衡,显着提高氧化还原液流电池的性能,包括全钒系统。这些膜通过优化的孔径实现了质子和钒离子的精确分离,减少了钒离子交叉,同时通过其微孔结构和亚胺基团功能保持了低面积电阻。在电流密度为40-100 mA cm-2的情况下,单层电化学电池具有较高的库仑效率(94.18-99.19%)和能量效率(75.37-88.50%)。PBI与含磺酸COFs和cop的集成提高了膜的电化学性能和化学稳定性,确保了长期循环耐久性。这项工作为设计超高质子选择性膜提供了一种有前途的方法,为先进的氧化还原液流电池和其他电化学系统提供了有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Polybenzimidazole Membranes Doped with Sulfonic Acid-Containing Covalent Organic Frameworks and Polymers for Enhanced Performance in Vanadium Redox Flow Batteries

Polybenzimidazole Membranes Doped with Sulfonic Acid-Containing Covalent Organic Frameworks and Polymers for Enhanced Performance in Vanadium Redox Flow Batteries

Polybenzimidazole (PBI)-based membranes in vanadium redox flow batteries (VRFBs) achieve high Coulombic efficiency due to their excellent ion selectivity; however, their energy efficiency remains relatively low due to restricted proton transport. Covalent organic framework (COF) and polymer (COP)-based proton-selective membranes have been developed to address the trade-off between proton permeability and selectivity, significantly improving the redox flow battery performance, including all-vanadium systems. These membranes achieve precise proton and vanadium ion separation with an optimized pore size, reducing vanadium ion crossover while maintaining low area resistance through their microporous structure and imine group functionalities. Single electrochemical cells with these membranes demonstrate high Coulombic efficiencies (94.18–99.19%) and energy efficiencies (75.37–88.50%) at current densities of 40–100 mA cm–2. The integration of PBI with the sulfonic acid-bearing COFs and COPs enhances the membranes’ electrochemical performance as well as their chemical stability, ensuring long-term cycle durability. This work presents a promising approach for designing ultrahigh-proton-selective membranes, offering valuable insights for advanced redox flow batteries and other electrochemical systems.

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来源期刊
ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces 工程技术-材料科学:综合
CiteScore
16.00
自引率
6.30%
发文量
4978
审稿时长
1.8 months
期刊介绍: ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.
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