Qingming Hou, Hongyan Cao, Yu Xia, Yekai Cai, Xinyi Chen, Haiyang Hong, Kenan Xu, Kang Huang* and Zhi Xu,
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Rigid Framework-Constrained Membranes: A Key to Long-Life Polysulfide/Polyiodide Redox Flow Batteries
The emerging polysulfide/polyiodide redox flow batteries (PSIBs) attract much attention owing to their high capacity and low cost. However, severe polysulfide/polyiodide crossover and insufficient cycle life caused by membrane swelling impede their large-scale applications. Herein, we constructed a rigid framework-constrained membrane, where rigid carbonylated polymer of intrinsic microporosity (cPIM-1) chains were introduced to bind the movement of the flexible perfluorosulfonic acid (PFSA) polymer chain. Quartz crystal microbalance and positron annihilation techniques demonstrated optimizing the PFSA/cPIM (P/cPIM) composite membrane structure and channel size. In the PSIB test, the battery with the P/cPIM membrane operated stably for over 780 h, which significantly improved over the 165 h recorded for the PFSA membrane.
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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