Effect of TiO2 grain size on performance of Ba0.5Sr0.5TiO3 based capacitors for energy storage application. (20th January 2021)

• Record Type: Journal Article
• Authors: P. S., Smitha; S. Jayan, Jitha; Appukuttan, Saritha; V., Suresh Babu; G., Shiny
• Is Part Of: Micro & nano letters. Volume 16:Number 3(2021)
• Page Start: 239
• Page End: 244
• Publication Date: 2021-01-20
• Subjects: Structure of powders and porous materials -- Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials -- Microstructure -- Dielectric permittivity -- Powder techniques, compaction and sintering -- Preparation of ceramics and refractories -- Other heat and thermomechanical treatments -- Capacitors; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mna2.12038
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract: Performance of energy storage devices, particularly metal‐insulator‐metal capacitors are evaluated mainly by leakage current and specific capacitance. The insulator material Ba 0.5 Sr 0.5 TiO 3 shows high specific capacitance owing to its high relative permittivity. In this work, Ba 0.5 Sr 0.5 TiO 3 nanopowder is synthesized using commercially available TiO 2 nanopowder (ACS reagent grade) as well as using synthesized TiO 2 nanopowder from Ti isopropoxide. The crystallinity and grain sizes of commercially available and synthesized TiO 2 nanopowder differ. The effects of crystallinity and grain size of TiO 2 nanopowder on specific capacitance and leakage current density of Ba 0.5 Sr 0.5 TiO 3 ceramic based metal‐insulator‐metal capacitors are investigated in this paper. An 88 % reduction in grain size is achieved in TiO 2 nanopowder synthesized from Ti isopropoxide compared to commercially available TiO 2 nanopowder. A 45 % enhancement in specific capacitance and 57 % enhancement in leakage current are achieved in Ba 0.5 Sr 0.5 TiO 3 ceramic based metal‐insulator‐metal capacitor synthesized using TiO 2 nanopowder with lower grain size. The lower leakage current of metal‐insulator‐metal capacitor with Ba 0.5 Sr 0.5 TiO 3 ceramic of low grain size is investigated with its structure using X‐ray powder diffraction pattern analysis as well. The Ba 0.5 Sr 0.5 TiO 3 ceramics synthesized using TiO 2 nanopowder with lower grain size is a suitable candidate for insulator material in metal‐insulator‐metal capacitors for energy storage application.