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Freestanding and Ultra‑flexible PAN/ZIF‑67 Hybrid Membrane with Controlled Porosity for High‑Performance and High‑Safety Lithium Batteries Separator

查看全文 作　　者：Mao [1]Guo;Hangyi [1]Zhu;Pengfei [1]Wan;Feng [1]Xu;Caihong [1]Wang;Shengjun [1]Lu;Yufei [2]Zhang;Haosen [1]Fan;Jian [3]Xu 高影响力作者 机构地区：[1]College of Materials Science and Metallurgy Engineering,Guizhou University,Guiyang 550025,China;[2]School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China;[3]Institute of Low‑Dimensional Materials Genome Initiative,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,China高影响力机构 出　　处：《Advanced Fiber Materials》索引2022年第4卷第6期,共14页高影响力期刊 基　　金：This work was supported by the National Natural Science Foundation of China(51563002,52101243);the“100-level”Innovative Talents Project of Guizhou Province China([2016]5653);Natural Science Foundation of Guangdong Province(2020A1515010886);the Science and Technology Planning Project of Guangzhou(202102010373). 摘　　要：Herein,a flexible ZIF-67/PAN hybrid membrane was successfully prepared by the incorporation of ZIF-67 nanoparticles and PAN nanofibers through electrospinning method.The hybrid membrane presented tomatoes on sticks structures with one single PAN fiber stringing series of ZIF-67 nanoparticles.The morphology,electrolyte wettability,heat resistance,flexibility,and electrochemical properties of the electrospun ZIF-67/PAN membranes were discussed.Among the membranes prepared with different percentage of ZIF-67,the 30% ZIF-67/PAN membrane exhibited outstanding heat shrinkage resistance(remained intact at 200℃ for 1 h),excellent electrolyte uptake(556.39%),wide electrochemical window(~5.25 V)and high ionic conductivity(2.98 mS cm^(−1)).When used as lithium-ion batteries(LIBs)separators,the cells assembled by 30% ZIF-67/PAN membrane presented excellent rate capacity and high capacity retention of 86.9% after 300 cycles at 1C.More importantly,the cells assembled with ZIF-67/PAN membranes repeated bent for 1000 times also exhibited high rate performance and maintained capacity retention of 92% after 100 cycles at 1 C.The characterization and the electrochemical testing suggest the electrospinning prepared ZIF-67/PAN flexible membranes can be expected to be used as potential separator for advanced batteries with high safety and high performance. 关 键 词：ZIF-67/PAN Hybrid membrane Ultra-flexible High safety SEPARATOR
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