期刊
NANOSCALE
卷 10, 期 33, 页码 15454-15461出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr03743d
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资金
- National Natural Science Foundation of China [51573077]
- 333 Project to Cultivate High Level Talents in Jiangsu Province
- Six Talent Peaks Project in Jiangsu Province
- Natural Science Foundation of Jiangsu Province of China [BK20170834]
- Open Project Program of State Key Laboratory of Organic-Inorganic Composites [oic-201701009]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Metal-organic frameworks (MOFs) provide great opportunities for synthesizing advanced electrode materials with hierarchical hollow architectures for energy storage. Herein, we report the facile fabrication of core-sheath nanoarrays (NAs) on carbon cloth (CC@CoO@S-Co3O4) for binder-free electrode materials with MOFs as versatile scaffolds. The hollow S-doped Co3O4 sheath has been facilely prepared using a two-step synthetic protocol, which includes the surface etching of CoO nanowires for synchronous in situ growth of well-aligned ZIF-67 and its following hydrothermal process. The synergistic effect between CC nanofibers and hollow ordered NAs ensures efficient mass and electron transport. The pseudocapacitive NAs present a highest areal specific capacitance of 1013 mF cm(-2) at 1 mA cm(-2). By assembling the same MOF-derived nanoporous carbons and NAs as the corresponding binder-free anode and cathode, the flexible all-solid-state asymmetric supercapacitors deliver a highest energy density of 0.71 mW h cm(-3) at 21.3 mW cm(-3) power density, together with 87.9% capacitance retention over 5000 continuous cycles.
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