| Full text | |
| Author(s): |
Wang, Tao
;
de Oliveira, Rafael B.
;
Andreeta, Marcello R. B.
;
Wang, Haoyuan
;
Jia, Zhitai
;
Tao, Xutang
Total Authors: 6
|
| Document type: | Journal article |
| Source: | Crystal Growth & Design; v. 21, n. 4, p. 8-pg., 2021-01-26. |
| Abstract | |
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) | |
| FAPESP's process: | 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 16/04788-0 - EMU granted in process 2013 / 07793-6: X-Ray Fluorescence spectrometer equipment, model ZSX PRIMUS II |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 13/17071-8 - Laser-heated crystal growth technique implantation and the preparation of single crystals with zonal eutectic concentration for medical applications |
| Grantee: | Marcello Rubens Barsi Andreeta |
| Support Opportunities: | Regular Research Grants |