| Autor: |
Sarr, Samba, Bakhoum, Daba T., Sylla, Ndeye F., Ndiaye, Ndeye M., Tarimo, Delvina J., Maphiri, Vusani M., Ngom, Balla D., Manyala, Ncholu |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 8/14/2024, Vol. 48 Issue 30, p13492-13505, 14p |
| Abstrakt: |
A one-step solvothermal approach was used to integrate nitrogen-doped reduced graphene oxide into vanadium dioxide (VO2) to prepare a V@XN-G (where X = 24, 48 and 96 and is the mass of urea as the nitrogen (N) source) nanocomposite material. After optimization, V@48N-G showed better performance with a specific capacitance of 197.4 F g−1 at 0.5 A g−1 in a wide working potential window of 0.0–0.8 V vs. silver/silver chloride and was adopted as a positive electrode. Thus, cocoa waste-based activated carbon (ACC) was investigated and considered a negative electrode in assembling an asymmetric full-cell V@48N-G//ACC. The device exhibited good specific energy and power of 28.8 W h kg−1 and 425.1 W kg−1, respectively, at a voltage window and specific current of 1.7 V and 0.5 A g−1, respectively. Its cycling stability resulted in a Coulombic efficiency (CE) and capacitance retention (CR) of 99.8% and 73%, respectively, over 10 000 galvanostatic charge/discharge cycles at 10 A g−1. Therefore, the V@48N-G//ACC device shows excellent electrochemical performance and is suitable for energy storage application technology. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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