Fabrication of ultrathin CoMoO4 nanosheets modified with chitosan and their improved performance in energy storage device
| Autor: | Ramya Ramkumar, Manickam Minakshi |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Aqueous solution
Materials science Nanotechnology 02 engineering and technology Molybdate 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 7. Clean energy Capacitance 0104 chemical sciences Inorganic Chemistry Chitosan chemistry.chemical_compound chemistry Chemical engineering Electrode 0210 nano-technology Mesoporous material Faraday efficiency |
| Zdroj: | Dalton Transactions. 44:6158-6168 |
| ISSN: | 1477-9234 1477-9226 |
| Popis: | Ultrathin nanosheet-assembled cobalt molybdate (CoMoO4) with a mesoporous morphology was synthesized by a urea-assisted solution combustion route at a temperature of 400 °C. The as-prepared CoMoO4 was modified using chitosan cross-linked with glutaraldehyde (glu) and employed as a cathode material in an aqueous hybrid capacitor. The physical and electrochemical behaviour of CoMoO4 modified with chitosan and the as-prepared (chitosan free) CoMoO4 has been compared and discussed. The modified CoMoO4 exhibited excellent electrochemical performance with a specific capacitance of 135 F g−1 at 0.6 A g−1 and an energy density of 31 W h kg−1. It also exhibited good cycling stability with high coulombic efficiency over 2000 cycles retaining a specific capacitance of 81 F g−1 at 3 A g−1, comparatively much better than that of nanostructured chitosan free CoMoO4 which yielded 17 F g−1. The results indicated that chitosan gel strongly adheres to the molybdate moiety of CoMoO4 and increases the capacitance four-fold compared to a chitosan free material. The modified CoMoO4 electrode shows potential for high performance, and is an environmentally friendly and low-cost energy storage device. |
| Databáze: | OpenAIRE |
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