Abstract
AbstractWe 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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