| dc.description.abstract |
In this study, cellulose nanocrystal (CNC)-based nanocomposites are synthesized using solution casting method. Varying amounts of carbon nanotubes and poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) are integrated into the CNC matrix, which is derived from sugarcane bagasse (Saccharum officinarum), an agricultural waste product. The CNCs provided a sustainable and biodegradable platform, while the nanofillers enhanced the composite properties. Field emission scanning electron microscopy reveals a highly porous structure, and Brunauer-Emmett-Teller analysis confirms the mesoporosity of the nanocomposite with a specific surface area of 171.72 m2/g and an average pore diameter of 4.4 nm. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy verify the interactions between the nanofillers and the polymer matrix. The nanocomposite exhibited excellent electrical conductivity (47 S/m) with high tensile strength (11.6 MPa) and remarkable flexibility when carbon nanotubes are incorporated in it and owing to the creation of conducting path. Electrochemical characterization using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy in a 0.5 M Na2SO4 electrolyte demonstrated a high specific capacitance of 572 F/g, an energy density of 28.5 Wh/kg, and a power density of 120 W/kg at a current density of 0.4 A/g. Furthermore, the material retained 98% of its capacitance after 5000 charge-discharge cycles. These CNC-based nanocomposites are expected to be promising for advanced supercapacitor and battery electrode materials, offering a sustainable, biodegradable, and high-performance alternative to conventional materials. |
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