| Texto completo | |
| Autor(es): |
Alkathy, Mahmoud S.
;
Pattipaka, Srinivas
;
Gatasheh, Mansour K.
;
Zabotto, Fabio L.
;
Eiras, Jose A.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Inorganic and Organometallic Polymers and Materials; v. 34, n. 3, p. 15-pg., 2023-10-12. |
| Resumo | |
Developing novel ferroelectrics using lead-free ceramics for cutting-edge electrical and energy storage devices is vital given the global atmospheric pollution and the energy crisis due to such ceramics' high power density and good stability. Unfortunately, the majority have weak breakdown energies and a slight variation between maximum and remaining polarization, which leads to low energy density and efficiency. Complex defect dipoles between oxygen vacancies and acceptor co-doped ions have been used to overcome this issue. By doing this, BaTiO3-based ceramics can more efficiently and densely store energy. Mg and Mn acceptor co-doping ions on the Ti site create (Mg-Ti '' - V-O(center dot center dot) and Mg-Ti '' - V-O(center dot center dot)) defect dipoles in the BaTiO3 host matrix. This increases breakdown strength to 175 kV/cm, providing a high difference between saturation and remaining polarization. This increased energy storage density (from 0.596 to 1.784 J/cm(3)) and efficiency (42-92%). Furthermore, the energy storage density is stable throughout operating frequencies and temperatures. The results indicate that defect dipole engineering can be considered a promising technique to improve the energy storage performance of lead-free ferroelectric ceramics potentially. [GRAPHICS] . (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 |