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Hierarchical Micro‐Mesoporous Carbon‐Framework‐Based Hybrid Nanofibres for High‐Density Capacitive Energy Storage
Author(s) -
Cheng Hengyang,
Meng Jinku,
Wu Guan,
Chen Su
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201911023
Subject(s) - supercapacitor , materials science , energy storage , capacitance , nanotechnology , graphene , mesoporous material , carbon fibers , carbon nanotube , nanomaterials , electrode , specific surface area , specific energy , chemical engineering , composite material , composite number , chemistry , power (physics) , physics , biochemistry , quantum mechanics , catalysis , engineering
Advanced methods, allowing the controllable synthesis of ordered structural nanomaterials with favourable charges transfer and storage, are highly important to achieve ideal supercapacitors with high energy density. Herein, we report a microliter droplet‐based method to synthesize hierarchical‐structured metal–organic framework/graphene/carbon nanotubes hybrids. The confined ultra‐small‐volume reaction, give well‐defined hybrids with a large specific‐surface‐area (1206 m 2 g −1 ), abundant ionic‐channels (narrow pore of 0.86 nm), and nitrogen active‐sites (10.63 %), resulting in high pore‐size utilization (97.9 %) and redox‐activity (32.3 %). We also propose a scalable microfluidic‐blow‐spinning method to consecutively generate nanofibre‐based flexible supercapacitor electrodes with striking flexibility and mechanical strength. The supercapacitors display large volumetric energy density (147.5 mWh cm −3 ), high specific capacitance (472 F cm −3 ) and stably deformable energy‐supply.