ZIF-derived wrinkled Co3O4 polyhedra supported on 3D macroporous carbon sponge for supercapacitor electrode |
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| Affiliation: | 1. Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, Key Lab of Eco-Environments Related Polymer Materials of MOE, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, PR China;2. Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou, 730070, PR China;1. School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University, Tianjin 300072, China;2. Section of Proton Conductors, Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet B207, DK-2800 Lyngby, Denmark;3. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China;4. Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin, 300072, China;1. Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, China;2. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China |
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| Abstract: | Co3O4/melamine-derived carbon sponge (MCS) nanocomposite in which wrinkled ball-in-dodecahedral Co3O4 nanoparticles derived from ZIF-67 were homogeneously dispersed on the interconnected MSC was fabricated via a simple immersion and thermolysis route. As-prepared ultralight Co3O4/MCS possessed mechanically robust characteristic and unique 3D macroporous framework anchored with corrugated Co3O4 dodecahedra. Utilized as a pseudocapacitor electrode, Co3O4/MCS hybrid exhibited a great specific capacitance of 1409.5 F g?1 at the current density of 0.5 A g?1 and excellent long-term cycling stability of 93.2% after 1000 charge/discharge cycles, which might be ascribed to the synergistic effect of the inherent high redox activity from Co3O4 polyhedra combined with excellent electrical conductivity of MCS. This work demonstrates that tunable structure design and rational morphology control are efficient approaches for manufacturing novel electrode materials with extraordinary electrochemical performance. |
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| Keywords: | Nanocomposite Supercapacitor Melamine Carbon sponge |
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