Enhanced capacitive performance of polyaniline on hydroquinone-functionalized three-dimensional porous graphene substrate for supercapacitors
| Autor: | Zhao Dan, Daipeng Hu, Huixia Feng, Nali Chen, Lin Tan, Feifei Zhang, Chihuan Liu |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Supercapacitor Materials science Scanning electron microscope Substrate (chemistry) Infrared spectroscopy Nanoparticle Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound symbols.namesake chemistry Chemical engineering 0103 physical sciences Polyaniline symbols Electrical and Electronic Engineering In situ polymerization Raman spectroscopy |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 32:5655-5667 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | Three-dimensional porous graphene/polyaniline (3D-G/PANI) electrode materials were fabricated with hydroquinone-functionalized three-dimensional porous graphene (3D-G) as the substrate. To obtain 3D-G/PANI, the functionalized 3D-G substrate was synthesized through a hydrothermal method first, and then, polyanilines (PANIs) were grown onto the skeleton of functionalized 3D-G substrate by the in situ polymerization of aniline (An). The effect of An amount was optimized to improve the electrochemical performance of 3D-G/PANI. The results of scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy and infrared spectroscopy reveal that functionalized 3D-G was successfully prepared and PANIs were uniformly grown on the skeleton of functionalized 3D-G in the form of nanoparticles. The 3D-G/PANI prepared with 80 μL of An exhibits a highest specific capacitance of 542 F/g at 1.5 mA/cm2 (1.14 A/g), 2.05 and 1.54 times those of functionalized 3D-G and PANI, respectively. And the 3D-G/PANI retains a specific capacitance of 435 F/g even at 30 mA/cm2 (22.73 A/g). Moreover, the capacity retention is 82% of initial specific capacitance after 3000 charge/discharge cycles, which is much higher than that of PANI (62%) after 1000 cycles. |
| Databáze: | OpenAIRE |
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