Designing F/P Hybrid Polymer as Ultrastable Cationic Shielding Interphase for High-Performance Lithium Metal Batteries |
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| Authors: | Shantao Han Baifei Wu Huaijiao Wang Peng Wen Lu Zhang Prof Dr Xinrong Lin Prof Dr Mao Chen |
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| Institution: | 1. State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433 China;2. Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education;3. Yunnan Provincial Center for Research & Development of Natural Products;4. School of Chemical Science and Technology, Yunnan University, Kunming, 650091 P. R. China |
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| Abstract: | Dendrite growth on electrode-electrolyte interphase has severely limited applications of lithium metal batteries (LMBs). Here, we developed an ionic alternating polymer with fluorocarbons and phosphonium cations in repeating units to regulate Li deposition for the first time. The combined functionalities in the F/P hybrid polymer exhibit remarkable characteristics as a protective layer on top of Li anode, demonstrating outstanding electrochemical stability, ion flux redistributing capability and adaptive chain mobility. Based on characterizations and simulations, this cationic interlayer could effectively furnish long-standing electrostatic shielding for anodes, allowing restrained coating decomposition and homogenized electric field distribution to induce dendrite-free Li deposition, and enabling full cells with enhanced rate and long-term cycling performance. Given the importance of LMBs, this work will promote polymer design to stabilize anodes with superior electrochemical behavior. |
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| Keywords: | Dendrite-Free Anode Electrostatic Shielding Fluoropolymer Li Metal Battery Phosphonium |
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