Surface Modification of Sputtered Carbon Supercapacitor Electrode by Hydrogen Annealing
| Autor: | Muhammad Shahid, Noor Zaman, Ramzan Abdul Karim, Muhammad Iqbal, Azhar Hussain |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Supercapacitor
Hydrogen annealing Materials science Graphene Mechanical Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry Chemical engineering Mechanics of Materials law Electrode Surface modification General Materials Science 0210 nano-technology Carbon |
| Zdroj: | Key Engineering Materials. 875:49-54 |
| ISSN: | 1662-9795 |
| Popis: | In the applications of renewable energy; use of energy in the electric vehicles and many other electronic devices such as mobile devices and computers; electrical energy storage is essential. Batteries are used to store electrical energy but have low power density and lower cycle life. Using extremely porous electrode materials for supercapacitors, based on quick ion transport, are specialized to provide high power density, long stability and effective energy storage. Using graphene-based electrode is the best way to boost the energy density of supercapacitor. Graphene synthesized by chemical exfoliation, ultrasonic exfoliation and solution based chemical reduction suffers agglomerations that tends to restack the graphene sheets. In the present work, we studied the option of hydrogen gas annealing to obtain graphene from amorphous carbon film, coated on Cu substrate using sputtering. For electrochemical assessment, in situ developed film was compared with graphene applied from other methods of graphene synthesis. Atomic force microscopy (AFM) results revealed that annealed carbon sputtered electrode has high route mean square (RMS) roughness i.e 181.5 nm, most probably because of graphene formation. Cyclic voltammogram (CV) results show less area curve for annealed electrode which depicts high active area for charge storage and enhanced conductivity due to deposited graphene layer. |
| Databáze: | OpenAIRE |
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