Study on GDC-LSGM composite electrolytes for intermediate-temperature solid oxide fuel cells |
| |
| Authors: | Bin Li Shufen Liu Xiaomei Liu Guangye Hao Haopeng Wang Wenhui Su |
| |
| Affiliation: | 1. College of Computer Science and Technology, Jilin University, 2699 Qianjin Street, Changchun 130012, China;2. Key Laboratory of Physics and Technology for Advanced Batteries, Department of Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, China |
| |
| Abstract: | The electrolyte materials Ce0.9Gd0.1O1.9 (GDC) and La0.9Sr0.1Ga0.8Mg0.2O2.85 (LSGM) were synthesized by means of glycine-nitrate processes, respectively, then GDC-LSGM composite electrolytes were prepared by mixing GDC and LSGM. The GDC and LSGM powders were mixed in the weight ratio of 95:5, 90:10 and 85:15 and named as GL9505, GL9010 and GL8515. Their structures and ionic conductivities were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman and AC impedance spectroscopy. The grain sizes of GDC-LSGM composites could be increased distinctly and the grain boundary resistance could be significantly decreased by small addition of LSGM. The experimental results show that the GDC-LSGM composites exhibit excellent ionic conductivity and could significantly enhance the fuel cell performances. The open circuit voltages are higher in the cell with composite electrolytes than in the cell with single GDC as electrolyte at the working temperature. Among these electrolytes, GL9505 has the highest ionic conductivity and the maximum power density. |
| |
| Keywords: | Solid oxide fuel cell Electrolyte GDC-LSGM Electrochemical performance |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
