Electrochemical Performance Of Symmetric Supercapacitor Based On Acivated Carbon Biomass TiO2 Nanocomposites Markus Diantoro1,2,* Ishmah Luthfiyah1, Istiqomah1, Hari Wisodo1,2, Joko Utomo1,2 Worawwat Meevasana3
1 Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5 Malang 65145, Indonesia
2 Center of Advanced Material for Renewable Energy (CAMRY), Universitas Negeri Malang, Jl. Semarang 5, Malang 65145, Indonesia
3Department of Physics Faculty of Science, Suranaree University Of Technology, Nakhon Ratchasuma, Thailand
Abstract
Supercapacitor (SC) is an energy storage devices possessing both high energy density and high power density which have attracted intensive interest due to their wide range of applications from consumer electronics to traction devices. Titanium is considered to be a promising transitional metal to modify carbon electrode for supercapacitors application due to its relatively good rate capability, low cost, low toxicity and environmental benignity. Porous composites comprise very small TiO2 nanoparticles uniformly distributed within activated carbon pores, proving short the pathways for both ion and electron transport needed for fast electrochemical reactions. Briefly, the experiment begins with the preparation of a composite solution with a variety of compositions that are positioned on the aluminum foil substrate as electrodes using the doctor blade method. The supercapacitor is filled with 1 M ETNBF4 and characterized by X-Ray diffraction (XRD), Scanning Electron Microscopy (SEM-EDX) and Charge Discharge (CD). The symetric supercapacitor can be cycled reversibility in the cell voltage of 0-2 V, delivers a specific capacitance of 14,139 F g-1, with power density of 328,33 Wh kg-1 and maximum energy density of 23,71 Wh kg-1.After 50 cycles, maximum energy density is 22,09 Wh kg-1 with 92,33 % capacity retention.
Keywords: Symmetric Supercapacitor, titanium doxide, energy density
