Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 8, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202115559
Keywords
Electrochemical Supercapacitors; Hierarchical-Ordered Fiber; High Energy Density; Microfluidic Fabrication; Self-Powered Applications
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Funding
- National Natural Science Foundation of China [21706120]
- Natural Science Foundation of Jiangsu Province [BK20211592]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Hierarchical-ordered ZIF-L(Zn)@Ti3C2Tx MXene core-sheath fibers exhibit well-developed micro-/mesoporosity, ordered ionic pathways, fast interfacial electron conduction, and large-scale fabrication, significantly enhancing charges dynamic transport and intercalation. The resulting fiber shows high capacitance and outstanding rate performance, contributing to high energy density, excellent capacitance, deformable capabilities, and long-time cyclic stability in solid-state asymmetric supercapacitors.
We report hierarchical-ordered ZIF-L(Zn)@Ti3C2Tx MXene core-sheath fibers, in which a ZIF-L(Zn) nanowall array sheath is grown vertically on an anisotropic Ti3C2Tx core by Ti-O-Zn/Ti-F-Zn chemical bonds. Through highly efficient microfluidic assembly and microchannel reactions, ZIF-L(Zn)@Ti3C2Tx exhibits well-developed micro-/mesoporosity, ordered ionic pathways, fast interfacial electron conduction and large-scale fabrication, significantly boosting charges dynamic transport and intercalation. The resultant ZIF-L(Zn)@Ti3C2Tx fiber presents large capacitance (1700 F cm(-3)) and outstanding rate performance in a 1 M H2SO4 electrolyte. Additionally, ZIF-L(Zn)@Ti3C2Tx fiber-based solid-state asymmetric supercapacitors deliver high energy density (19.0 mWh cm(-3)), excellent capacitance (854 F cm(-3)), large deformable/wearable capabilities and long-time cyclic stability (20 000 cycles), which realize natural sunlight-induced self-powered applications to drive water level/earthquake alarm devices.
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