| Texto completo | |
| Autor(es): |
Moraes, Leticia P. R.
;
Machado, Marina
;
Rodrigues, Lays N.
;
Sun, Ziqi
;
Marani, Debora
;
Fonseca, Fabio C.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Alloys and Compounds; v. 967, p. 9-pg., 2023-12-10. |
| Resumo | |
A novel method for bottom-up synthesis of two-dimensional (2D) gadolinium-doped cerium oxide (CGO) nanosheets is developed and demonstrated as an efficient precursor for interdiffusion barrier layer deposition in solid oxide fuel cells. The CGO is the standard material used as an interlayer in intermediate-temperature solid oxide fuel cells to avoid undesirable reactions between lanthanum strontium cobalt ferrite (LSCF) cathode and yttria-stabilized zirconia (YSZ) electrolyte materials. Herein, the shape-control of the 2D CGO by a low-cost wet-chemical method allowing for the fabrication of fully dense barrier layer of CGO is reported. The high surface coverage promoted by the 2D CGO nanosheets resulted in a thin (similar to 1 mu m) and dense interdiffusion barrier layer sintered at 1150 degrees C preventing the undesirable reaction between oxide ion conducting phases occurring at higher temperatures. The electrochemical properties of solid oxide fuel cells confirmed the CGO nanosheet as an efficient layer for preventing the formation of resistive phases at the electrolyte/cathode interface. (AU) | |
| Processo FAPESP: | 16/50339-2 - Chemical fabrication of active nanomaterials for fuel cells on natural gas and bioethanol fluels |
| Beneficiário: | Fabio Coral Fonseca |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 15/20434-0 - Desenvolvimento de tintas cerâmicas baseadas em nanofolhas para impressão jato de tinta de camadas ultrafinas de componentes de células de óxidos sólidos (SOCs) |
| Beneficiário: | Fabio Coral Fonseca |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Internacional |