Effect of TiO2 as Filler in NaCl: Possible Applications in Ionic Storage Systems

High dielectric capacitors are increasingly used for energy storage in sustainable nanotechnologies. Here, we observed large enhancement of dielectric constant by 3 order at frequency 1kHz with moderate loss when TiO2 is added as a filler in NaCl bulk matrix. The TiO2 nanoparticles are synthesized v...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 2267; no. 1; pp. 012092 - 12102
Main Authors Kour, Simrandeep, Mukherjee, Rupam
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.05.2022
Subjects
Current carriers
Dielectric loss
Dielectric strength
Emission analysis
Energy storage
Field emission microscopy
Fillers
Frequency ranges
High dielectric capacitors
Ionic matrix
Low frequencies
Mobile charge carriers
Nanoparticles
Percolation
Permittivity
Physics
Sol-gel processes
Storage systems
Titanium dioxide
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Summary:High dielectric capacitors are increasingly used for energy storage in sustainable nanotechnologies. Here, we observed large enhancement of dielectric constant by 3 order at frequency 1kHz with moderate loss when TiO2 is added as a filler in NaCl bulk matrix. The TiO2 nanoparticles are synthesized via sol gel process and is subsequently added in varying weight percentage x in the ionic matrix of NaCl, which is represented as TiO2(x)NaCl. The parameters like dielectric constant, dissipation Loss and ac conductivity are measured with varying fraction of TiO2 in frequency range less than 25 KHz. The steady increase of dielectric constant with increasing filler content at low frequency indicates percolation type behavior which accounts for the first dielectric peak at x= 50. The dielectric loss is found to be around 1 for x< 45 whereas it tends to increases with higher filler fraction. Moreover, the frequency dependent polarization in this composite system also accounts for hopping type behavior of mobile charge carriers contributed by TiO2 as confirmed from ac conductivity measurement. Further, the samples are characterized by X-ray diffraction and Field emission scanning electron microscopy in order to study the structure and morphology of the samples. Overall, TiO2 incorporation strongly improves the dielectric behavior of the ionic matrix at low frequency, making it suitable for super dielectric material (SDM).
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2267/1/012092