Journal
EMERGENT MATERIALS
Volume 4, Issue 2, Pages 531-544Publisher
SPRINGERNATURE
DOI: 10.1007/s42247-020-00159-1
Keywords
Pet coke; Graphene; Multi-heteroatom; Porous structure; Energy storage; Supercapacitors
Categories
Funding
- Hierarchically Nanostructured Energy Materials for Next Generation Na-ion Based Energy Storage Technologies and their Use in Renewable Energy Systems [DST/TMD/MES/2 K16/77]
- AOARD [FA2386-19-1-4039]
- Ramanujan fellowship
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Graphene is proposed as a replacement for activated carbon in energy storage devices, ranging from supercapacitors to batteries. The generation of multi-heteroatom self-doped graphene structure from waste materials is an efficient way to meet energy requirements with productive applications in energy devices. A high-yield synthetic strategy for preparing multi-heteroatom self-doped highly porous graphene nanosheet from petroleum coke has been presented, with excellent performance in supercapacitor application.
Graphene is being suggested as a replacement for activated carbon in energy storage devices ranging from supercapacitors to batteries. The generation of multi-heteroatom self-doped graphene structure from waste materials will be an efficient way to meet the energy requirements with its productive applications in energy devices. Here, we present a novel, high-yield synthetic strategy to prepare multi-heteroatom self-doped highly porous graphene nanosheet from Pet coke (petroleum coke). Following a comprehensive characterization of graphene using electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and its functionality in supercapacitor application is reported. The electrochemical performance of Pet graphene, in combination with 1 M H2SO4, is able to deliver specific capacitance as high as similar to 170 F/g in 0.5 A/g current density, with low equivalent series resistance. The fabricated symmetric device exhibited a maximum specific capacitance of 44 F/g at 0.5 A/g current density with an excellent energy density of similar to 8.8 Wh/Kg along with a power density of similar to 800 W/Kg at 0.5 A/g current density. The fabricated device also shows high cycling stability and Coulombic efficiency. The results establish a new protocol for the large-scale synthesis of graphene from carbonaceous waste materials, making it competitive with its low-cost counterparts.
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