Research Article

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2021, 14(5): 1465–1470

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https://doi.org/10.1007/s12274-020-3203-0

Fabrication of metal-organic framework-based nanofibrous separator via one-pot electrospinning strategy

Congcong Chen1,§, Weidong Zhang2,§, He Zhu1,3 (✉), Bo-Geng Li1, Yingying Lu2, and Shiping Zhu3,4 (✉)

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1 State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
2 Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
3 School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
4 Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
§ Congcong Chen and Weidong Zhang contributed equally to this work.

Keywords: one-pot electrospinning strategy, metal-organic framework, composite nanofibrous membrane, battery separator
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  • Abstract
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Metal-organic framework (MOF)/polymer composites have attracted extensive attention in the recent years. However, it still remains challenging to efficiently and effectively fabricate these composite materials. In this study, we propose a facile one-pot electrospinning strategy for preparation of HKUST-1/polyacrylonitrile (PAN) nanofibrous membranes from a homogeneous stock solution containing HKUST-1 precursors and PAN. MOF crystallization and polymer solidification occur simultaneously during the electrospinning process, thus avoiding the issues of aggregation and troublesome multistep fabrication of the conventional approach. The obtained HKUST-1/PAN electrospun membranes show uniform MOF distribution throughout the nanofibers and yield good mechanical properties. The membranes are used as separators in Li-metal full batteries under harsh testing conditions, using an ultrathin Li-metal anode, a high mass loading cathode, and the HKUST-1/PAN nanofibrous separator. The results demonstrate significantly improved cycling performance (capacity retention of 83.1% after 200 cycles) under a low negative to positive capacity ratio (N/P ratio of 1.86). The improvement can be attributed to an enhanced wettability of the separator towards electrolyte stemmed from the nanofibrous structure, and a uniform lithium ion flux stabilized by the open metal sites of uniformly distributed HKUST-1 particles in the membrane during cycling.
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Fabrication of metal-organic framework-based nanofibrous separator via one-pot electrospinning strategy. Nano Res. 2021, 14(5): 1465–1470 https://doi.org/10.1007/s12274-020-3203-0

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