Sulfur-Doped Graphene as a Rational Anode for an Ionic Liquid Based Hybrid Capacitor with a 3.5 v Working Window
Issued Date
2022-03-03
Resource Type
ISSN
08870624
eISSN
15205029
Scopus ID
2-s2.0-85124884005
Journal Title
Energy and Fuels
Volume
36
Issue
5
Start Page
2799
End Page
2810
Rights Holder(s)
SCOPUS
Bibliographic Citation
Energy and Fuels Vol.36 No.5 (2022) , 2799-2810
Suggested Citation
Shaikh N.S., Lokhande V.C., Pansa-Ngat P., Ubale S., Shaikh J.S., Praserthdam S., Sabale S.R., Lokhande C.D., Ji T., Kanjanaboos P. Sulfur-Doped Graphene as a Rational Anode for an Ionic Liquid Based Hybrid Capacitor with a 3.5 v Working Window. Energy and Fuels Vol.36 No.5 (2022) , 2799-2810. 2810. doi:10.1021/acs.energyfuels.1c03625 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/84100
Title
Sulfur-Doped Graphene as a Rational Anode for an Ionic Liquid Based Hybrid Capacitor with a 3.5 v Working Window
Other Contributor(s)
Abstract
In this work, the facile thermal annealing of graphene oxide in a H2S atmosphere was used to obtain sulfur-doped graphene (SG) for anode materials for supercapacitors. The high electrical conductivity and the interconnected micro-pore structure of the SG electrode assisted in the fast transportation of electrons and ions at the electrode-electrolyte interface in the developed hybrid supercapacitors. The SG-based electrode resulted in an excellent specific capacitance of 460 F/g at 1 A/g. The nickel oxide could be obtained by a simple hydrothermal method, exhibiting a specific capacitance of 1236 F/g in 1 M KOH. The fabricated solid-state hybrid devices (Ss-HSCs) showed a high energy density of 21.8 Wh/kg at 661.7 W/kg power density with substantial cycling stability up to 89.0% over 1000 cycles in the PVA-KOH solid electrolyte. Considering pragmatic usages in heavy-duty appliances and hybrid vehicles, we fabricated quasi-solid-state ionic liquid BMIM-PF6/DMF based hybrid supercapacitors (Iq-HSCs) that were operated at 3.5 V. The Iq-HSC devices were capable of delivering 134.6 Wh/kg of the energy density at 1005.7 W/kg and the high power density with 69.3% capacitance retention over 1000 cycles.