Effect of Pb on Crystal Structure and Electrical Conductivity of Dielectric SrTi1-xPbxO3 Compound for Supercapacitor Materials Markus Diantoro (a,b*), Nadiya Ayu Astarini (a), Suci Elya Intan Suryani (a), Nasikhudin (a,b), Ahmad Taufiq (a,b)
a) Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5 Malang 65145, Indonesia b) Centre of Advance Materials for Renewable Energy, Universitas Negeri Malang, Jl. Semarang 5 Malang 65145, Indonesia *markus.diantoro.fmipa[at]um.ac.id
Abstract
Material research for harvesting energy is increasing in an effort to find alternative renewable energy devices. A lot of thermal energy wasted in everyday life. Research for various alternative high-capacitance supercapacitor materials continue to be encouraged. SrTiO3 shows a good electrical and dielectric properties, as well as defect induced structure. Modification of local structure using Pb dopant on the SrTi1-xPbxO3 was applied for exploring the scientific information and its potential applications intensively. Synthesis of SrTi1-xPbxO3 was prepared by solid-state reaction method. The powder was then calcined, pressed into pellet, and subsequently sintered at 860 C. Various fraction of lead (Pb) dopants were carried out in 0.00; 0.02; 0.04; 0.06; 0.08; 0.1 molar ratio. The structure, morphology, and thermoelectric properties of SrTi1-xPbxO3 composite powder were performed by using X-Ray Diffraction, SEM-EDX, and temperature induced conductivity. EDX data analysis revealed that the composition of the sample was in accordance with the composition designed. XRD data analysis with Cu-Ka wavelength indicated the single phase was identified and a slight change in lattice parameters was observed. Sixfold symmetry of the local octahedral structure also changed to a tetragonal structure after introducing the amount of Pb element. For investigating electrical properties of SrTi1-xPbxO3, I-V meter was applied. Furthermore, electrical conductivity and dielectric constant will be discussed in detail. Loading higher Pb fraction promoted the electrical conductivity measured at various temperatures. Increasing conductivity is one indicator that this system potentially enhanced electronic exchange of supercapacitor in SrTi1-xPbxO3 system.
Keywords: supercapacitor, SrTiO3, Pb, structure, temperature electrical conductivity
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