Importance of microstructure and interface in designing metal oxide nanocomposites for supercapacitor electrodes
| Autor: | D.S. Sutar, Smrutiranjan Parida, Debananda Mohapatra, Balwant Kr Singh |
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| Rok vydání: | 2017 |
| Předmět: |
Performance
General Chemical Engineering Composite number Oxide 02 engineering and technology 010402 general chemistry Electrochemical Capacitors 01 natural sciences Capacitance Analytical Chemistry Lithium-Ion Batteries chemistry.chemical_compound Electrochemistry Films Composites Horizontal scan rate Supercapacitor Nanocomposite Energy-Conversion Interface 021001 nanoscience & nanotechnology Microstructure Carbon Nanostructures 0104 chemical sciences chemistry Chemical engineering Electrode Tio2 Nanoparticles Graphene 0210 nano-technology |
| Zdroj: | Journal of Electroanalytical Chemistry. 803:30-39 |
| ISSN: | 1572-6657 |
| Popis: | In this work, we demonstrate that designing metal oxide nanocomposite with an optimized nanocarbon to metal oxide ratio is required to realize the best electrochemical performance. Using carbon nano-onion (CNO) and TiO 2 composite as a model system, it is evidenced that the formation of interfacial structure and the existence of electrical percolation networks are essential to enhance electrical performance of the composite. When the aforementioned conditions are satisfied, CNO/TiO 2 hybrid nanocomposites (CTHNs) with only 11 wt% TiO 2 loading exhibits excellent electrochemical performance. The maximum specific capacitance obtained for this composite electrode is 386 Fg − 1 at a scan rate of 5 mVs − 1 , which is the highest reported value till date in a TiO 2 composite electrode measured in a two electrode cell configuration. At this composition, excellent electrochemical stability is obtained with only 5% capacitance degradation over 2000 cycles. As the TiO 2 loading increases the electrochemical performance decreases. |
| Databáze: | OpenAIRE |
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