Publication: Symmetric supercapacitor: Sulphurized graphene and ionic liquid
Issued Date
2018-10-01
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ISSN
10957103
00219797
00219797
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2-s2.0-85047238124
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Colloid and Interface Science. Vol.527, (2018), 40-48
Suggested Citation
Jasmin S. Shaikh, Navajsharif S. Shaikh, Rohini Kharade, Sonali A. Beknalkar, Jyoti V. Patil, Mahesh P. Suryawanshi, Pongsakorn Kanjanaboos, Chang Kook Hong, Jin Hyeok Kim, Pramod S. Patil Symmetric supercapacitor: Sulphurized graphene and ionic liquid. Journal of Colloid and Interface Science. Vol.527, (2018), 40-48. doi:10.1016/j.jcis.2018.05.022 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/45415
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Title
Symmetric supercapacitor: Sulphurized graphene and ionic liquid
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Abstract
© 2018 Symmetric supercapacitor is advanced over simple supercapacitor device due to their stability over a large potential window and high energy density. Graphene is a desired candidate for supercapacitor application since it has a high surface area, good electronic conductivity and high electro chemical stability. There is a pragmatic use of ionic liquid electrolyte for supercapacitor due to its stability over a large potential window, good ionic conductivity and eco-friendly nature. For high performance supercapacitor, the interaction between ionic liquid electrolyte and graphene are crucial for better charge transportation. In respect of this, a three-dimensional (3D) nanoporous honeycomb shaped sulfur embedded graphene (S-graphene) has been synthesized by simple chemical method. Here, the fabrication of high performance symmetric supercapacitor is done by using S-graphene as an electrode and [BMIM-PF6] as an electrolyte. The particular architecture of S-graphene benefited to reduce the ion diffusion resistance, providing the large surface area for charge transportation and efficient charge storage. The S-graphene and ionic liquid-based symmetric supercapacitor device showed the large potential window of 3.2 V with high energy density 124 Wh kg−1 at 0.2 A g−1 constant applied current density. Furthermore, this device shows good cycling performance (stability) with a capacitive retention of 95% over 20,000 cycles at a higher current density of 2 A g−1.