Shaheen Nusrat, Chen Zheng, Alomar Muneerah, Su Tao, Nong Yumei, Althubaiti Nada, Yousaf Muhammad, Lu Yuzheng, Liu Qiang
School of Civil Engineering and Architecture, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University Nanning 530004 PR China
Key Laboratory of Disaster Prevention and Structural Safety of China Ministry of Education, School of Civil Engineering and Architecture, Guangxi University Nanning 530004 China.
RSC Adv. 2023 Jul 10;13(30):20663-20673. doi: 10.1039/d3ra01698f. eCollection 2023 Jul 7.
Recent studies indicate that electrolyte ionic conductivity plays a pivotal role in reducing the operating temperature of solid oxide fuel cells (SOFCs). In this regard, nanocomposite electrolytes have drawn significant attention owing to their enhanced ionic conductivity and fast ionic transport. In this study, we fabricated CeO-LaBaBiFeO nanocomposites and tested them as a high-performance electrolyte for low-temperature solid oxide fuel cells (LT-SOFCs). The prepared samples were characterized by their phase structure, surface, and interface property transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS), followed by being applied in SOFCs to examine their electrochemical performance. In the fuel cells, it was found that the optimal composition 90CeO-10LaBaBiFeO electrolyte-based SOFC delivered a peak power density of 834 mW cm along with an open circuit voltage (OCV) of 1.04 V at 550 °C. A comparative study revealed that the nanocomposite electrolyte exhibited a total conductivity of 0.11 S cm at 550 °C. Moreover, the rectification curve manifested the formation of the Schottky junction, suppressing the electronic conduction. This study conclusively shows that the addition of LaBaBiFeO (LBBF) into ceria electrolyte is a viable approach for constructing high-performance electrolytes for LT-SOFCs.
最近的研究表明，电解质离子电导率在降低固体氧化物燃料电池（SOFC）的工作温度方面起着关键作用。在这方面，纳米复合电解质因其增强的离子电导率和快速的离子传输而备受关注。在本研究中，我们制备了CeO-LaBaBiFeO纳米复合材料，并将其作为低温固体氧化物燃料电池（LT-SOFC）的高性能电解质进行测试。通过透射电子显微镜（TEM）、扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对制备的样品进行相结构、表面和界面性质表征，然后将其应用于SOFC中以检测其电化学性能。在燃料电池中，发现基于90CeO-10LaBaBiFeO电解质的最佳组成在550°C时提供了834 mW cm的峰值功率密度以及1.04 V的开路电压（OCV）。一项对比研究表明，该纳米复合电解质在550°C时的总电导率为0.11 S cm。此外，整流曲线表明形成了肖特基结，抑制了电子传导。这项研究最终表明，向氧化铈电解质中添加LaBaBiFeO（LBBF）是构建用于LT-SOFC的高性能电解质的可行方法。
