SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (7): 1918-1924.DOI: 10.1016/j.cjche.2020.03.010

• Energy, Resources and Environmental Technology • 上一篇    下一篇

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 Jiang1, Lei Hu1, Xiaoming Yan1,2, Jiahui Sun1, Li Gao1, Yan Dai1,2, Xuehua Ruan1, Gaohong He1,2   

  1. 1 State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China;
    2 Panjin Industrial Technology Institute, Dalian University of Technology, Panjin 124221, China
  • 收稿日期:2019-06-12 修回日期:2020-02-07 出版日期:2020-07-28 发布日期:2020-08-31
  • 通讯作者: Xiaoming Yan
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (U1808209), Fundamental Research Funds for the Central Universities (DUT18JC40), and Liaoning Province Science and Technology Department (201601037).

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 Jiang1, Lei Hu1, Xiaoming Yan1,2, Jiahui Sun1, Li Gao1, Yan Dai1,2, Xuehua Ruan1, Gaohong He1,2   

  1. 1 State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China;
    2 Panjin Industrial Technology Institute, Dalian University of Technology, Panjin 124221, China
  • Received:2019-06-12 Revised:2020-02-07 Online:2020-07-28 Published:2020-08-31
  • Contact: Xiaoming Yan
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (U1808209), Fundamental Research Funds for the Central Universities (DUT18JC40), and Liaoning Province Science and Technology Department (201601037).

摘要: 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 cm2·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).

关键词: Amphoteric membrane, Poly(2,6-dimethyl-1,4-phenylene oxide) (PPO), Vanadium redox flow battery, Polybenzimidazole (PBI), Long side chain

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 cm2·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).

Key words: Amphoteric membrane, Poly(2,6-dimethyl-1,4-phenylene oxide) (PPO), Vanadium redox flow battery, Polybenzimidazole (PBI), Long side chain