Reduced graphene oxide/nano-silica (rGO/n-SiO2) nanocomposite for electrode materials of supercapacitor with a high cycling stability

•Synthesis of reduced graphene oxide nanocomposite (rGO/n-SiO2) was successfully prepared through the hydrothermal method.•rGO/n-SiO2 nanocomposite exhibits high specific capacitance and excellent cyclic stability.•Excellent cyclic stability of 95.51 % was kept after 4000 cycles. In this study, a co...

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Bibliographic Details
Published in:	South African journal of chemical engineering Vol. 48; pp. 130 - 137
Main Authors:	Ristiana, Desinta Dwi, Handayani, Murni, Anggoro, Muhammad Aulia, Widagdo, Bambang Wisnu, Angelina, Ellysa, Sutanto, Hadi, Anshori, Isa, Febriana, Eni, Firdiyono, Florentinus, Sulistiyono, Eko, Prasetyo, Agus Budi, Lusiana, Astawa, I Nyoman Gede Putrayasa
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-04-2024 Elsevier
Subjects:	Hydrothermal method Nano-silica Nanocomposite Reduced graphene oxide Supercapacitor Supercapacitor Nanocomposite Hydrothermal method Reduced graphene oxide Nano-silica
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Summary:	•Synthesis of reduced graphene oxide nanocomposite (rGO/n-SiO2) was successfully prepared through the hydrothermal method.•rGO/n-SiO2 nanocomposite exhibits high specific capacitance and excellent cyclic stability.•Excellent cyclic stability of 95.51 % was kept after 4000 cycles. In this study, a composite of reduced graphene oxide and nano-silica (rGO/n-SiO2) was synthesized via the hydrothermal method, which is a facile technique and green reduction method. Nano-size silica provided a high surface area and more surface-active sites to react, while the modification with rGO improved the silica potential for a supercapacitor electrode. The XRD and Raman results confirmed the success of rGO/n-SiO2 synthesis. The FESEM and TEM showed that the SiO2 nanoparticles are highly distributed on graphene sheets. The rGO/n-SiO2 offers a high energy density value of 23.2 W h kg−1 at a power density of 50.0 W kg−1. After 4000 cycles, the electrode revealed good stability with a high capacitance retention of 95.51%. The rGO/n-SiO2 yields a high specific capacitance of 166.9 F g−1, suggesting that it could be helpful for supercapacitor electrodes. [Display omitted]
ISSN:	1026-9185
DOI:	10.1016/j.sajce.2024.01.012