A simple strategy to prepare a layer-by-layer assembled composite of Ni–Co LDHs on polypyrrole/rGO for a high specific capacitance supercapacitor
| Autor: | Adila Mohamad Jaafar, Muhammad Amirul Aizat Mohd Abdah, Nur Hawa Nabilah Azman, Yusran Sulaiman, Shalini Kulandaivalu, Mohd Zobir Hussein |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science Graphene General Chemical Engineering Layer by layer Layered double hydroxides 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Polypyrrole 01 natural sciences Capacitance 0104 chemical sciences law.invention chemistry.chemical_compound Chemical engineering chemistry law Electrode engineering 0210 nano-technology |
| Zdroj: | RSC Advances. 9:40478-40486 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c9ra08134h |
| Popis: | A facile and novel electrode material of nickel–cobalt layered double hydroxides (Ni–Co LDHs) layered on polypyrrole/reduced graphene oxide (PPy/rGO) is fabricated for a symmetrical supercapacitor via chemical polymerization, hydrothermal and vacuum filtration. This conscientiously layered composition is free from any binder or surfactants which is highly favorable for supercapacitors. The PPy/rGO serves as an ideal backbone for Ni–Co LDHs to form a free-standing electrode for a high-performance supercapacitor and enhanced the overall structural stability of the film. The well-designed layered nanostructures and high electrochemical activity from the hexagonal-flakes like Ni–Co LDHs provide large electroactive sites for the charge storage process. The specific capacitance (1018 F g−1 at 10 mV s−1) and specific energy (46.5 W h kg−1 at 464.9 W kg−1) obtained for the PPy/rGO|Ni–Co LDHs symmetrical electrode in the current study are the best reported for the two-electrode system for PPy- and LDHs-based composites. The outstanding performance in the prepared LBL film is a result of the LBL architecture of the film and the combined effect of redox reaction and electrical double layer capacitance. |
| Databáze: | OpenAIRE |
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