Symmetric supercapacitor: Sulphurized graphene and ionic liquid.

Autor: Shaikh JS; Thin Film Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India. Electronic address: Jasminsshaikh@gmail.com., Shaikh NS; School of Materials Science and Innovation, Faculty of Science, Mahidol University, Bangkok, Thailand., Kharade R; Department of Chemistry, Mumbai University, India., Beknalkar SA; Thin Film Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India., Patil JV; Thin Film Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India., Suryawanshi MP; Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 500-757, South Korea., Kanjanaboos P; School of Materials Science and Innovation, Faculty of Science, Mahidol University, Bangkok, Thailand., Hong CK; Polymer Energy Materials Laboratory (Room No. 5B404), School of Advanced Chemical Engineering, Chonnam National University, Gwangju 61186, South Korea., Kim JH; Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 500-757, South Korea., Patil PS; Thin Film Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India; School of Nanoscience and Technology, Shivaji University, Kolhapur 416004, India. Electronic address: psp_phy@unishivaji.ac.in.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2018 Oct 01; Vol. 527, pp. 40-48. Date of Electronic Publication: 2018 May 11.
DOI: 10.1016/j.jcis.2018.05.022
Abstrakt: 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-PF 6 ] 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 .
(Copyright © 2018 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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