Preparation of ternary composite CF@γ-MnO2/PANI material in electrochemical supercapacitors
In this paper, a ternary hybrid material carbon fiber/manganese dioxide/polyaniline (CF@γ-MnO 2 /PANI) is synthesized for its utility in supercapacitor application. γ-MnO 2 nanoparticles are loaded on the surface of CF under hydrothermal conditions to prepare CF@γ-MnO 2 . Subsequently, PANI in situ...
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Veröffentlicht in: | Journal of materials science. Materials in electronics 2021-10, Vol.32 (20), p.25300-25317 |
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Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this paper, a ternary hybrid material carbon fiber/manganese dioxide/polyaniline (CF@γ-MnO
2
/PANI) is synthesized for its utility in supercapacitor application. γ-MnO
2
nanoparticles are loaded on the surface of CF under hydrothermal conditions to prepare CF@γ-MnO
2
. Subsequently, PANI in situ polymerized on the surface of CF@γ-MnO
2
to form CF@γ-MnO
2
/PANI ternary composite. The electrochemical performance of CF@γ-MnO
2
/PANI is investigated using cyclic voltammetry (CV), galvanostatic charge–discharge measurement (GCD), and electrochemical impedance spectroscopy (EIS). Compared with CF/PANI and PANI, the as-prepared ternary hybrid material exhibits the highest capacitance of 654.3 F g
−1
at a current density of 1 A g
−1
, its rate performance is 78.1% (10 A g
−1
), and 75.94% of the initial capacitance after 4000 charge–discharge cycles. The asymmetric supercapacitor shows a specific capacitance of 260 F g
−1
and high energy density 30.9 Wh kg
−1
at a power density of 750 W kg
−1
, good cycling stability by maintaining 73.2% initial capacitance after 5000 cycles. The good capacitive behaviors demonstrated that the low-cost CF provides an excellent base for γ-MnO
2
and PANI. The nanoparticles γ-MnO
2
is supported on the surface of CF and coated by PANI, which effectively improves the utilization rate of MnO
2
and PANI. It could be a promising material for supercapacitors applications. |
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ISSN: | 0957-4522 1573-482X |
DOI: | 10.1007/s10854-021-06989-x |