Conformal porous carbon coating on carbon fiber cloth/NiS2 composites by molecular layer deposition for durable supercapacitor electrodes
| Autor: | Aidong Li, Jia-Bin Fang, Yan-Qiang Cao, Chang Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Nanostructure Materials science Mechanical Engineering 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Capacitance 0104 chemical sciences Atomic layer deposition Coating Mechanics of Materials Etching (microfabrication) Electrode engineering General Materials Science Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Materials Research. 35:738-746 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.2019.359 |
| Popis: | To solve the poor cyclability of faradic supercapacitors (SCs), the authors reported a unique porous carbon (PC) coating with “gap shell” structure on carbon fiber cloth (CFC)/NiS2 materials. This gap shell PC coating was fabricated by combining atomic layer deposition (ALD) Al2O3 and molecular layer deposition alucone, followed by carbonization and etching. The as-prepared CFC/NiS2/PC composites were directly used as binder-free electrodes for SCs. Benefited from its novel nanostructure, the CFC/NiS2/PC electrode shows a large specific capacitance of 1034.6 F/g at 1 A/g and considerable rate capability of 67% capacitance, retaining ratio within 1–20 A/g. The cyclability of the CFC/NiS2/PC electrode is enhanced by 50% relative to the mere CFC/NiS2 after 2000 cycles, which is attributed to the gap and electrically conductive PC coating. Hence, this work provides a promising approach to design gap shell layer for improved cyclability of faradic SCs and other practical applications in energy storage electronics. |
| Databáze: | OpenAIRE |
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