A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)/polybenzimidazole (PBI) amphoteric membrane for vanadium redox flow battery

Bowen Jiang; Lei Hu; Xiaoming Yan; Jiahui Sun; Li Gao; Yan Dai; Xuehua Ruan; Gaohong He

doi:10.1016/j.cjche.2020.03.010

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A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)/polybenzimidazole (PBI) amphoteric membrane for vanadium redox flow battery

Energy, Resources and Environmental Technology | Updated：2026-01-06

- A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)/polybenzimidazole (PBI) amphoteric membrane for vanadium redox flow battery
- A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)/polybenzimidazole (PBI) amphoteric membrane for vanadium redox flow battery
- 中国化学工程学报（英文版） 2020年28卷第7期页码：1918-1924
- Affiliations：
  
  1. State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology,Panjin,China,124221
  2. Panjin Industrial Technology Institute, Dalian University of Technology,Panjin,China,124221
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.03.010
  中图分类号：
- 纸质出版：2020
- Accepted：
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Bowen Jiang, Lei Hu, Xiaoming Yan, 等. A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)/polybenzimidazole (PBI) amphoteric membrane for vanadium redox flow battery[J]. 中国化学工程学报（英文版）, 2020,28(7):1918-1924.

Bowen Jiang, Lei Hu, Xiaoming Yan, Jiahui Sun, Li Gao, Yan Dai, Xuehua Ruan, Gaohong He. A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)/polybenzimidazole (PBI) amphoteric membrane for vanadium redox flow battery[J]. Chinese Journal of Chemical Engineering, 2020, 28(7): 1918-1924.
Bowen Jiang, Lei Hu, Xiaoming Yan, 等. A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)/polybenzimidazole (PBI) amphoteric membrane for vanadium redox flow battery[J]. 中国化学工程学报（英文版）, 2020,28(7):1918-1924. DOI： 10.1016/j.cjche.2020.03.010.

Bowen Jiang, Lei Hu, Xiaoming Yan, Jiahui Sun, Li Gao, Yan Dai, Xuehua Ruan, Gaohong He. A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)/polybenzimidazole (PBI) amphoteric membrane for vanadium redox flow battery[J]. Chinese Journal of Chemical Engineering, 2020, 28(7): 1918-1924. DOI： 10.1016/j.cjche.2020.03.010.

摘要

Abstract

A new amphoteric membrane was prepared by blending long-side-chain sulfonated poly(2

6-dimethyl-1

4-phenylene oxide) (S-L-PPO) and polybenzimidazole (PBI) for vanadium redox flow battery (VRFB) application. An acid-base pair structure formed between the imidazole of PBI and sulfonic acid of S-L-PPO resulted in lowered swelling ratio. It favors to reduce the vanadium permeation. While

the increased sulfonic acid concentration ensured that proton conductivity was still at a high level. As a result

a better balance between the vanadium ion permeation (6.1×10

-9

·s

-1

) and proton conductivity (50.8 mS·cm

-1

) in the S-L-PPO/PBI-10% membrane was achieved. The VRFB performance with S-L-PPO/PBI-10% membrane exhibited an EE of 82.7%

which was higher than those of pristine S-L-PPO (81.8%) and Nafion 212 (78.0%) at 120 mA·cm

-2

. In addition

the S-LPPO/PBI-10% membrane had a much longer self-discharge duration time (142 h) than that of Nafion 212 (23 h).

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