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

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 HK...

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Bibliographic Details
Published in:Nano research 2021-05, Vol.14 (5), p.1465-1470
Main Authors: Chen, Congcong, Zhang, Weidong, Zhu, He, Li, Bo-Geng, Lu, Yingying, Zhu, Shiping
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Chemistry and Materials Science
Composite materials
Condensed Matter Physics
Crystallization
Cycles
Electrospinning
Fabrication
Ion flux
Lithium
Lithium ions
Materials Science
Mechanical properties
Membranes
Metal-organic frameworks
Metals
Nanofibers
Nanotechnology
Polyacrylonitrile
Polymer matrix composites
Polymers
Research Article
Separators
Solidification
Wettability
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Summary: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.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-020-3203-0