ACHIEVING SUPERIOR ENERGY STORAGE PERFORMANCE IN BARIUM TITANATE CERAMICS VIA A RARE EARTH CO-DOPING STRATEGY

Autor(es)

Alkathy, Mahmoud. S. ; Kassim, H. A. ; Gatasheh, Mansour K. ; Goud, J. Pundareekam ; Eiras, Jose A.

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS-SILIKATY; v. 68, n. 4, p. 11-pg., 2024-01-01.

Resumo

This study describes the fabrication of polycrystalline ceramics Ba1-x(La1/3, Nd1/3)xTiO3 by a solid-state reaction technique. The room temperature X-ray diffraction analysis using Rietveld refinement confirmed the formation of a polycrystalline compound with a tetragonal crystal structure consisting of a single phase. Doping BaTiO3 with La3+ and Nd3+ ions enhanced the relative permittivity at room temperature. The co-doped samples possess a much higher dielectric constant in the wide frequency range, an essential characteristic for producing ceramic capacitors. The P-E hysteresis loop of the investigated samples was performed at room temperature. The results show that the remnant polarisation decreased from 9.05 to 1.95 mu C center dot cm-2 while the breakdown strength increased from 50 kV center dot cm-1 to 167 kV center dot cm-1 when the co-dopants rose from 0 to 8 %. Accordingly, the energy storage density increased from 0.265 to 1.182 J center dot cm-3, and the efficiency also increased from 30 % to 77 %. The BLNT 8 % sample is also very stable throughout a wide temperature range, making it a promising option for future energy storage applications. (AU)

• Processo FAPESP: 23/05716-6 - Síntese e Caracterização de Materiais Ferroelétricos e Multiferroicos para Aplicações em Armazenamento e Conversores de Energia (Mecânica e Fotovoltaica)"
• Beneficiário: Mahmoud Saleh Mohammed Alkathy
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
• Processo FAPESP: 17/13769-1 - Materiais multiferróicos e ferroelétricos para conversores de energia: síntese, propriedades, fenomenologia e aplicações
• Beneficiário: José Antonio Eiras
• Modalidade de apoio: Auxílio à Pesquisa - Temático