Liu Yanyan, Xia Chen, Wang Baoyuan, Tang Yongfu
Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 064004, China.
Faculty of Physics and Electronic Science, Hubei University, Wuhan 430062, China.
Nanomaterials (Basel). 2021 May 6;11(5):1224. doi: 10.3390/nano11051224.
Enabling fast ionic transport at a low-temperature range (400-600 °C) is of great importance to promoting the development of solid oxide fuel cells (SOFCs). In this study, a layer-structured LiCoO-LiFeO heterostructure composite is explored for the low-temperature (LT) SOFCs. Fuel cell devices with different configurations are fabricated to investigate the multifunction property of LiCoO-LiFeO heterostructure composites. The LiCoO-LiFeO composite is employed as a cathode in conventional SOFCs and as a semiconductor membrane layer in semiconductor-based fuel cells (SBFCs). Enhanced ionic conductivity is realized by a composite of LiCoO-LiFeO and Sm doped ceria (SDC) electrolyte in SBFC. All these designed fuel cell devices display high open-circuit voltages (OCVs), along with promising cell performance. An improved power density of 714 mW cm is achieved from the new SBFC device, compared to the conventional fuel cell configuration with LiCoO-LiFeO as the cathode (162 mW cm at 550 °C). These findings reveal promising multifunctional layered oxides for developing high-performance LT-SOFCs.
在低温范围（400 - 600°C）实现快速离子传输对于推动固体氧化物燃料电池（SOFC）的发展至关重要。在本研究中，探索了一种层状结构的LiCoO - LiFeO异质结构复合材料用于低温（LT）SOFC。制备了具有不同结构的燃料电池装置，以研究LiCoO - LiFeO异质结构复合材料的多功能特性。LiCoO - LiFeO复合材料在传统SOFC中用作阴极，在基于半导体的燃料电池（SBFC）中用作半导体膜层。在SBFC中，LiCoO - LiFeO与钐掺杂二氧化铈（SDC）电解质的复合材料实现了增强的离子电导率。所有这些设计的燃料电池装置都显示出高开路电压（OCV）以及良好的电池性能。与以LiCoO - LiFeO为阴极的传统燃料电池配置（550°C时为162 mW/cm²）相比，新型SBFC装置实现了714 mW/cm²的改进功率密度。这些发现揭示了用于开发高性能LT - SOFC的有前景的多功能层状氧化物。
