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Copper oxide/cuprous oxide/hierarchical porous biomass-derived carbon hybrid composites for high-performance supercapacitor electrode.
- Source :
-
Journal of Alloys & Compounds . Apr2019, Vol. 782, p1103-1113. 11p. - Publication Year :
- 2019
-
Abstract
- Abstract Low cost and high-performance electrode materials are essential for supercapacitor development and applications. Herein, this paper reports a cost-effective and easy-operation method to prepare hierarchical structural heteroatoms-doped carbon/copper oxide/cuprous oxide (CuOx@C) nanocomposites using a calcination process and a hydrothermal treatment. When waste bamboo leaves are converted into carbon materials, the unique hierarchical structures and inherent heteroatoms could be maintained. The hierarchical porous structures allow a short diffusion and facile ion-transfer of electrolyte ions to the active materials during the electrochemical reaction. The copper oxide/cuprous oxide nanoparticles are introduced by hydrolysis of copper ions. By controlling the reaction condition, copper oxide/cuprous oxide nanoparticles are dispersed in the carbon. The hybridization of carbon and metal oxide results in a combination of electrical double-layer capacitance and battery-like capacitance. The obtained CuOx@C composite exhibits an excellent specific capacitance of capacity of 147 F g−1 and a long cyclic life of 93% after 10000 cycles of charge-discharge when it is applied as a material for supercapacitor. This work provides a new approach for fabrication of metal oxide/carbon nanocomposites for application in energy storage. Graphical abstract Image 1 Highlights • CuO/Cu 2 O oxide nanoparticles were hydrothermally synthesized on porous carbon derived from calcined waste bamboo leaves. • The obtained CuOx@C shows 147 F g−1 and maintained 93% after 10000 cycles. • CuO/Cu 2 O/carbon leads to a combination of electrical double-layer capacitance and battery-like capacitance. • This work provides a new approach for fabrication of metal oxide/carbon composites applying to energy storage. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 782
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 134687947
- Full Text :
- https://doi.org/10.1016/j.jallcom.2018.12.235