Title of article :
Characterizations of synthesized laser scribed graphene/molybdenum disulfide (LSG/MoS2) hybrids for supercapacitor performance
Author/Authors :
Vasudevan ، Mugashini Department of Mechanical Engineering - Centre of Innovative Nanostructures and Nanodevices (COINN) - Universiti Teknologi PETRONAS , Kanesan ، Aiswarya Department of Mechanical Engineering - Universiti Teknologi PETRONAS , Remesh ، Sathaniswarman Department of Mechanical Engineering - Centre of Innovative Nanostructures and Nanodevices (COINN) - Universiti Teknologi PETRONAS , Perumal ، Veeradasan Department of Mechanical Engineering - Centre of Innovative Nanostructures and Nanodevices (COINN) - Universiti Teknologi PETRONAS , Raja ، Pandian bothi School of Chemical Sciences - Universiti Sains Malaysia , Ibrahim ، Mohamad Nasir Mohamad School of Chemical Sciences - Universiti Sains Malaysia , Karuppanan ، Saravanan Department of Mechanical Engineering - Universiti Teknologi PETRONAS , Gopinath ، Subash C.B. Institute of Nano Electronic Engineering , Ovinis ، Mark School of Engineering and the Built Environment, Faculty of Computing, Engineering, and the Built Environment - Birmingham City University
Abstract :
A sustainable and organic energy storage system from oil palm lignin waste-derived laser-scribed graphene embedded with molybdenum disulfide (LSG/MoS2) is reported in this work. LSG/MoS2 hybrids were fabricated to overcome the zero-band gap of graphene, and molybdenum disulfide restacking issues, and to induce electrical conductivity. Various amounts of LSG (0.1,0.5,1.0 g) were added in a MoS2 precursor to produce a nanoscale LSG/MoS2 hybrid nanostructure via the hydrothermal method. The Raman D, G, and 2D bands of LSG confirmed the formation of graphene from lignin. The FESEM morphology of LSG/MoS2 hybrids showed a porous and large surface area anchored with 3D MoS2 nanoflower on LSG. TEM imaging revealed MoS2 decorated LSG with a lattice spacing of 0.62 and 0.27nm, corresponding to the (002) and (100) planes of MoS2. In terms of electrochemical performance, LSG with 0.1g of MoS2 has the lowest resistance, the highest specific capacitance of 6.7mF/cm² at 0.05 mA/cm², and excellent cyclic stability of 98.1% over 1000 cycles, based on Electrochemical Impedance Spectroscopy (EIS), Cyclic Voltammetry (CV) and Galvanostatic Charge Discharge (GCD) tests.
Keywords :
Oil palm lignin , Molybdenum disulfide , morphological , structural , Supercapacitor
Journal title :
Journal of Water and Environmental Nanotechnology (JWENT)
Journal title :
Journal of Water and Environmental Nanotechnology (JWENT)
