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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Mori, Shinsuke Hassan, Sameh Suzuki, Masaaki El-Moneim, Ahmed Abd |
| Copyright Year | 2014 |
| Abstract | Nanostructured MnO2 films with 50 and 100 μg cm−2 mass loadings supported on two dimensional (2D) stand-free carbon nanowalls (CNWs) were synthesized by anodic electrodeposition and investigated for supercapacitor application. The underlying CNW films of different growth periods, 12–24 s, were grown first by microwave plasma enhanced chemical vapor deposition on three dimensional (3D) nickel foam substrate. Tailoring the MnO2/CNW/Ni hybrid nanocomposite electrode with an optimized CNW growth period of 18 s and a MnO2 loading of 50 μg cm−2 achieves the best capacitive performance; it exhibits a specific capacitance of 1170 F g−1 at a galvanostatic charging–discharging current density of 1 mA cm−2 and retains 110% of its initial capacitance after 2000 cycles at a current density of 3 mA cm−2. The high density of atomic scale graphitic edges, large surface area with optimized defects and degree of crystallinity of CNWs in conjunction with an efficient utilization of MnO2 nanoparticles facilitated rapid electron and ion transport and electrochemical cyclic stability, hence offering the potential of unique capacitive behavior. These results demonstrate an exciting commercial potential for high performance, environmentally friendly and low-cost electrical energy storage devices based on the MnO2/CNW/Ni hybrid electrode. |
| Starting Page | 20479 |
| Ending Page | 20488 |
| Page Count | 10 |
| File Format | HTM / HTML PDF |
| ISSN | 20462069 |
| Volume Number | 4 |
| Issue Number | 39 |
| Journal | RSC Advances |
| DOI | 10.1039/c4ra01132e |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Electrode Cell membrane Microwave Ion CNW Carbon Chemical vapor deposition Three-dimensional space Supercapacitor Electrochemistry Capacitance Nickel Nanocomposite Electric current Electrophoretic deposition |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Chemical Engineering |
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