膜科学与技术

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Study on properties of polyaniline-based composite ionic
membranes and flow batteries

Authors： LI Yaqian, WANG Quan, ZHANG Kexin, LIU Qiaohong, SONG Peng, AN Quanfu

Units： College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

KeyWords： iron-chromium redox flow battery; polyaniline nanotubes; proton exchange membrane; proton conductivity

ClassificationCode：TQ028

year,volume(issue):pagination： 2025,45(2):1-11

Abstract：

The iron-chromium redox flow battery (ICRFB) has relatively low costs and shows promising application prospects in large-scale energy storage fields. Among them, the proton exchange membrane, as an important component of iron-chromium redox flow battery, has a significant impact on the battery’s energy storage efficiency. Therefore, it is crucial to develop new high-performance proton exchange membrane materials. In this study, a series of composite proton exchange membranes with varying doping levels were successfully prepared by incorporating polyaniline (PANI) nanotubes into Nafion membranes. The introduction of nanotubes improved the water retention capacity and dimensional stability of the membranes while enhancing their proton conductivity. Experimental results showed that the proton conductivity of the Nafion/PANI-0.5 membrane reached 223.4×10-2 S/cm at 80 ℃. The ICRFB single cell using this membrane achieved a coulombic efficiency (CE) and energy efficiency (EE) superior to those of the Nafion membrane at a current density of 100 mA/cm2, reaching 97.9% and 87.2%, respectively. The Nafion/PANI-0.5 membrane prepared in this study demonstrated great performance in ICRFB applications, providing a promising strategy to enhance the overall efficiency of redox flow battery energy storage systems.

Funds：

国家重点研发计划项目（2022YFB3805300）

AuthorIntro：

李雅倩（1998-），女，河南郑州人，硕士，主要研究方向为膜分离

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