One-step electrophoretic fabrication of a graphene and carbon nanotube-based scaffold for manganese-based pseudocapacitors
| Autor: | Zih-Wei Lin, Mohammad Mahmudul Huq, Chien-Te Hsieh, Chun-Yao Yuan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Supercapacitor
Materials science Graphene Nanoporous General Chemical Engineering Nanotechnology 02 engineering and technology General Chemistry Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance 0104 chemical sciences law.invention Electrophoretic deposition Chemical engineering law Electrode Pseudocapacitor 0210 nano-technology |
| Zdroj: | RSC Advances. 6:87961-87968 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c6ra10724a |
| Popis: | A reduced graphene oxide (rGO)/carbon nanotube (CNT)/MnOx based supercapacitor electrode has been fabricated successfully by a facile one-step electrophoretic deposition (EPD) method. During EPD, rGOs and CNTs form a three-dimensional nanoporous structure that works as a scaffold for manganese deposition. The weight loading and the film thickness can be easily tuned by varying the EPD time. Electrochemical measurements show that the as prepared electrode with a weight loading of 0.85 mg cm−2 exhibits a mass specific capacitance of 240 F g−1 at a current density of 0.5 A g−1. A relatively high areal capacitance (0.2 F cm−2) is achieved at the same current density and weight loading. The areal capacitance increases up to 0.27 F cm−2 as the weight loading is raised to 1.88 mg cm−2 at 0.5 A g−1. The excellent capacitive performance can be ascribed to the unique three dimensional structure created by CNTs and rGO that facilitates a more accessible electroactive area. Herein, 89% retention of the initial capacitance after 5000 cycles confirms that the as prepared electrode is a promising candidate for supercapacitor applications. |
| Databáze: | OpenAIRE |
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