Graphite-zinc oxide mixture synthesized via room temperature solid state reaction as electrodes for electrochemical capacitors

Authors

Danielle Christi Abastillas Martinez ⋅ PH Department of Physical Sciences, University of the Philippines Baguio
May Angelu Laureto Madarang ⋅ PH Department of Physical Sciences, University of the Philippines Baguio
Mark Denusta Ilasin ⋅ PH Department of Physical Sciences, University of the Philippines Baguio
Maranatha Del Moro Andalis ⋅ PH Department of Physical Sciences, University of the Philippines Baguio
Ralph Adrian Yambot Paragas ⋅ PH Department of Physical Sciences, University of the Philippines Baguio
Roselle Ngaloy ⋅ PH Department of Physical Sciences, University of the Philippines Baguio
Ian Jasper Ayagan Agulo ⋅ PH Department of Physical Sciences, University of the Philippines Baguio https://orcid.org/0000-0003-0745-9300

Abstract

In this study, the potential of graphite-ZnO mixtures as electrode material for electrochemical capacitors (ECs) was studied. The mixture was synthesized via room temperature solid state reaction and was drop-casted onto an ITO-PET substrate to form the electrodes. These electrodes were assembled together with a PVA-H₃PO₄ electrolyte and a separator to construct ECs. The fabricated ECs were subjected to electrochemical impedance spectroscopy (EIS) and cyclic voltammetry to quantify their electrochemical properties. The obtained cyclic voltammetry curves were used to compute for the capacitance, specific capacitance, energy density, and power density of the ECs. It was found that the G-ZnO3 sample (3:1) achieved a capacitance of 90 µF, but the graphite EC had a higher specific capacitance of 6.90 mF/g as compared to the ECs with ZnO. This was attributed to the poor conductivity of ZnO and the aggregation of the graphite and zinc oxide particles resulting to the decrease in the conduction sites on the surface of the electrode.

Downloads

Issue

2018: Proceedings of the 36th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2018-1G-05

Section

Condensed Matter Physics and Materials Science

Published

2018-05-25

How to Cite

[1]

DCA Martinez, MAL Madarang, MD Ilasin, MDM Andalis, RAY Paragas, R Ngaloy, and IJA Agulo, Graphite-zinc oxide mixture synthesized via room temperature solid state reaction as electrodes for electrochemical capacitors, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-1G-05 (2018). URL: https://proceedings.spp-online.org/article/view/SPP-2018-1G-05.