Fiber swelling to improve cycle performance of paper-based separator for lithium-ion batteries application

作     者：Zhenghao Li Wei Wang Xinmiao Liang Jianlin Wang Yonglin Xu Wei Li Zhenghao Li;Wei Wang;Xinmiao Liang;Jianlin Wang;Yonglin Xu;Wei Li

作者机构：College of Light Industry and Food EngineeringGuangxi UniversityNanning 530004GuangxiChina Guangxi Key Laboratory of Clean Pulp&Papermaking and Pollution ControlNanning 530004GuangxiChina State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsNational Center for Magnetic Resonance in WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071HubeiChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第79卷第4期

页      面：92-100页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the Natural Science Foundation of Guangxi Province(2018GXNSFBA138027) the Scientific Research Foundation of Guangxi University(XGZ170232) the National Enterprise Technology Center of Guangxi Bossco Environmental Protection Technology Co.,Ltd(202100033) 

主　　题：Paper-based separators Lithium-ion batteries Electrochemical properties Propionylation 

摘      要：It is well established that paper-based separators display short-circuit risk in lithium-ion batteries due to their intrinsic micron-sized *** this research,we have adjusted pore structure of paper by fiber swelling in liquid ***,the paper-based separator is prepared by propionylated sisal fibers through a wet papermaking *** electron microscope(SEM)and multi-range X-ray nano-computed tomography(CT)images display strong swelling of modified fibers after electrolyte absorption,which can effectively decrease the pore size of *** to the high electrolyte uptake(817 wt%),paper-based separator exhibits ionic conductivity of 2.93 mS cm^(-1).^(7)Li solid-state NMR spectroscopy and Gaussian simulation reveal that the formation of local high Li^(+)ion concentration in the separator and its low absorption energy with Li^(+) ion(62.2 kcal mol^(-1))is conducive to the ionic *** particular,the assembled Li/separator/LiFePO_(4) cell displays wide electrochemical stability window(5.2 V)and excellent cycle performance(capacity retention of 96.6%after 100 cycles at 0.5C)due to the reduced side reactions as well as enhanced electrolyte absorption and retention capacity by *** proposed strategy will provide a novel perspective to design high-performance biobased separators to boost the development of clean and sustainable energy economy.