MnO2/C composite with 3D hierarchical architecture for high-performance supercapacitor electrodes
| Autor: | Cheng Qian, Wei Zhang, Tongxiang Fan, Hongxun Yang, Xingmei Guo |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Supercapacitor
Materials science biology Process Chemistry and Technology Composite number 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology biology.organism_classification 01 natural sciences Capacitance 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Parides sesostris Electrode Materials Chemistry Ceramics and Composites Carbon substrate Composite material 0210 nano-technology Nanoscopic scale Microscale chemistry |
| Zdroj: | Ceramics International. 44:9696-9702 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.02.200 |
| Popis: | MnO2/C composite with 3D hierarchical ridge/straight-pore/nano-grid architecture (RPG-MnO2/C) is fabricated using Parides sesostris butterfly wings as both template and carbon source via a carbonizing-surface reaction process. The self-supported RPG-MnO2/C as supercapacitor electrode shows a maximum specific capacitance of 1539.7 F g−1 at 1 A g−1, which is among the highest values ever reported for MnO2. Excellent cycling stability retaining 97.6% of its initial capacitance after 10000 charge-discharge cycles at 10 A g−1 is also exhibited, together with ~100% coulomb efficiency. This outstanding performance can be attributed to the coupling effect of double-component composition (carbon substrate, MnO2 nanolayer) and multiscale hierarchical architecture (microscale ridges, sub-microscale straight pores, nanoscale grids). |
| Databáze: | OpenAIRE |
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