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Enhanced Li+migration in solid polymer electrolyte driven by anion-co.taining polymer-chains

Chinese Chemical Letters 2023年第11期34卷 342-345页

作者： Xingyi Zhang Modeste Venin Mendieev Nitou Wenjun Li Zhao Wan Longfei Liu Zhaohui Luo Sohail Muhammad Wu Qin Liang An Yinghua Niu Weiqiang Lv Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China School of physics University of electronic Science and Technology of ChinaChengdu 611731China X-Energy Systems co. Ltd.Jiaxing 314000China National Engineering Laboratory for Biomass Power Generation Equipment School of Renewable Energy EngineeringNorth China Electric Power UniversityBeijing 102206China Department of Mechanical Engineering the Hong Kong Polytechnic UniversityHong KongChina zhejiang humo polishing grinder manufacture co. Ltd.Huzhou 313012China

Li-ion batteries with solid polymer electrolytes(SPEs)are safer than co.ventional liquid electrolytes due to the absence of highly flammable liquid ***,their performance is limited by the poor Li+transport in SPEs at room ***-co.taining polymer-chains inco.porated SPEs(ASPEs)are therefore developed to enhance Li^(+) diffusion ***,we propose a novel and feasible strategy to inco.porate the anion-co.taining polymer-chains,such as lithiated perfluorinated sulfonic acid(PFSA),into polyvinylidene fluoride(PVDF)polymer-based *** immobile anion groups from the PFSA-chains impede the migration of mobile anion groups dissociated from the Li *** transference number is thus raised from∼0.3 to 0.52 with the introduction of anion-co.taining polymer-chains into *** electrostatic repulsion among anion-co.taining chains also reduces the close chain stacking and brings 159%increase in the ionic co.ductivity to 0.83×10^(−3) S/cm at 30℃ in co.trast with the pure PVDF-based *** addition,LiFeO_(4)/Li batteries with ASPEs exhibit 55%capacity boost at 0.5 C in co.trast to the capacity of batteries with pure-PVDF SPEs,and also offer more than 1000 charge/discharge *** research findings potentially offer a facile strategy to design thermal stable SPEs with superior Li^(+) transport behaviors towards developing high-performance SPEs-based batteries.

关键词： Solid polymer electrolyte Lithiated perfluorinated sulfonic acid Polyvinylidene fluoride Solid-state battery Anion co.taining polymer

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