Preparation and Properties of Ce<sub>0.8</sub>Sm<sub>0.16</sub>Y<sub>0.03</sub>Gd<sub>0.01</sub>O<sub>1.9</sub>-BaIn<sub>0.3</sub>Ti<sub>0.7</sub>O<sub>2.85</sub> Composite Electrolyte
oleh: Yajun Wang, Changan Tian, Minzheng Zhu, Jie Yang, Xiaoling Qu, Cao Chen, Cao Wang, Yang Liu
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-08-01 |
Deskripsi
Samarium, gadolinium, and yttrium co-doped ceria (Ce<sub>0.8</sub>Sm<sub>0.16</sub>Y<sub>0.03</sub>Gd<sub>0.01</sub>O<sub>1.9</sub>, CSYG) and BaIn<sub>0.3</sub>Ti<sub>0.7</sub>O<sub>2.85</sub> (BIT07) powders were prepared by sol-gel and solid-state reaction methods, respectively. CSYG-BIT07 composite materials were obtained by mechanically mixing the two powders in different ratios and calcining at 1300 °C for 5 h. Samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), as well as electrical properties and thermal expansion coefficient (TEC) measurements. A series of CSYG-BIT07 composite materials with relative densities higher than 95% were fabricated by sintering at 1300 °C for 5 h. The performance of the CSYG-BIT07 composite electrolyte was found to be related to the content of BIT07. The CSYG-15% BIT07 composite exhibited high oxide ion conductivity (<i>σ</i><sub>800°C</sub> = 0.0126 S·cm<sup>−1</sup> at 800 °C), moderate thermal expansion (TEC = 9.13 × 10<sup>−6</sup>/K between room temperature and 800 °C), and low electrical activation energy (<i>E</i><sub>a</sub> = 0.89 eV). These preliminary results indicate that the CSYG-BIT07 material is a promising electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs).