Nanocrystalline gadolinium-doped ceria (GDC) for SOFCs by an environmentally-friendly single step method

作者：Choolaei Mohammadmehdi; Cai Qiong; Slade Robert C T; Horri Bahman Amini^*

来源：Ceramics International, 2018, 44(11): 13286-13292.

DOI：10.1016/j.ceramint.2018.04.159

• Gd2O3-doped CeO2
• Intermediate temperature electrolytes
• Ammonium tartrate
• Nanocrystalline powder
• Solid oxide fuel cell

Nanocrystalline gadolinium-doped ceria (GDC) was synthesized by a single step, low cost and environmentally friendly method using ammonium tartrate as an inexpensive, green and novel precipitant. The precipitate obtained during the process was calcined at 400 and 600 degrees C and the effect on the final microstructural properties of the powders of differing process variables were studied. The synthesized GDC samples were analysed using a range of different techniques, including XRD, TG/DSC, FESEM, STEM, and FT-IR and Raman spectroscopies. The thermal (TG/DSC), XRD and Raman spectroscopic analyses confirm the formation of a single crystalline phase with a cubic (fluorite) unit cell and formed at a low calcination temperature (400 degrees C). XRD profiles permitted estimation of crystallite sizes as < 20 nm, which was further confirmed by STEM and FESEM micrographs indicating the formation of quasi-spherical particles with uniform particle sizes in the range 10-30 nm. This study will aid understanding of effects of process variables on the properties of doped metal-oxide powders prepared using the carboxylate route

• 出版日期2018-8-1