| Texto completo | |
| Autor(es): |
Wang, Tao
;
de Oliveira, Rafael B.
;
Andreeta, Marcello R. B.
;
Wang, Haoyuan
;
Jia, Zhitai
;
Tao, Xutang
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Crystal Growth & Design; v. 21, n. 4, p. 8-pg., 2021-01-26. |
| Resumo | |
Perovskite La0.557Li0.330TiO3 (LLTO) has been considered as one of the most promising solid-state electrolytes for lithium-ion batteries because of its high bulk ionic conductivity at room temperature (similar to 10(-3) S/cm). However, the full potential of this compound, as a ceramic electrolyte, is limited by the low ionic conductivity of the grain boundary (<10(-5) S/cm). One way to avoid the grain boundary barrier is to introduce LLTO crystals connecting the two electrodes. In this work, using LaAlO3 (LAO) single-crystal fibers as seeds, the conditions for oriented crystal growth of the LLTO compound, inside a bulk ceramic, are presented and discussed for different crystallographic directions ([100], [110], and [111]). The relationship between the LLTO crystal region and sintering parameters was investigated in detail, and a maximum growth rate was obtained using a [111]-oriented LAO single-crystal fiber. It is also shown that anisotropic epitaxial growth behaviors of LLTO crystals, in the LLTO/LAO composites, could be explained by morphological analysis and DFT simulations. The successful implementation of controllable LLTO crystal growth provides a feasible design for new solid-state electrolytes. (AU) | |
| Processo FAPESP: | 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros |
| Beneficiário: | Edgar Dutra Zanotto |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 16/04788-0 - EMU concedido no processo 2013/07793-6: equipamento espectrômetro de raios-X fluorescente, modelo ZSX Primus II |
| Beneficiário: | Edgar Dutra Zanotto |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |
| Processo FAPESP: | 13/17071-8 - Implantação da técnica de crescimento de cristais via fusão a laser e a preparação de cristais com concentração zonal eutética para aplicações em procedimentos cirúrgicos |
| Beneficiário: | Marcello Rubens Barsi Andreeta |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |