Preparation of covalently cross-linked sulfonated polybenzimidazole membranes for vanadium redox flow battery applications
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- 关键词：Sulfonated polybenzimidazole ; Membrane ; Cross-linking ; Vanadium permeability ; Redox flow battery performance
- 刊名：Journal of Membrane Science
- 出版年：2017
- 出版时间：1 March 2017
- 年：2017
- 卷：525
- 期：Complete
- 页码：229-239
- 全文大小：1038 K
- 卷排序：525
文摘
Highly sulfonated polybenzimidazoel copolymers have been synthesized. The covalently cross-linked sulfonated polybenzimidazole membranes exhibit 3-4 orders of magnitude lower VO2+ permeability and 6–30 times higher H/V selectivity than Nafion 117. The redox flow battery assembled with a cross-linked membrane exhibits high energy efficiency (85%) at 60 mA cm−2. The redox flow battery displays little performance decay after 300 charge-discharge cycles.