merged

The Influence of Milling Time on the Surface Morphology and Particle Size
of Supercapacitor Electrodes
Andrian Kalang anak Fedrick
Supervisor: Dr. Khadijah Hilmun binti Kamarudin
Co-Supervisor: Assoc. Prof. Dr. Mohd Ikmar Nizam Mohamad Isa
Bachelor of Applied Science (Electronics and Instrumentation Physics)
School of Ocean Engineering
Ball-milling is one of important techniques used to reduce the particle size of electrode
materials in order to enhance the electrochemical performance of supercapacitor. In
this study, carboxylmethyl cellulose-ammonium nitrate was employed in the
fabrication of supercapacitor as solid polymer electrolyte (SPE). The effect of ball
milling times and milling speeds were determined. The influence of milling time on the
charge-discharge characteristics and specific capacitance of supercapacitor was
investigated via galvanostatic charge-discharge (GCD). In addition, the surface
morphology and cross section of the supercapacitor was studied using scanning
electron microscope (SEM). The impedance analysis on SPE revealed the room
temperature with ionic conductivity of 8.8586x10 -3 S/cm. SEM analysis revealed the
decrease of particle size with the increment of milling time. Supercapacitors are able
to deliver high rates of charge and discharge for the increasing demands on the energy
storage device.
119 | U M T U N D E R G R A D U A T E R E S E A R C H D A Y 2 0 1 9