半导体异质结燃料电池发电性能研究

Study on power generation performance of semiconductor heterojunction fuel cell

低温固体氧化物燃料电池(LT-SOFC)极具商业化应用前景,而低温工作状态下高性能电解质材料仍是巨大的挑战。基于n型氧化锌和p型氧化镍构建PN半导体异质结材料体系,并将其作为固态电解质应用于LT-SOFC,通过X射线衍射(XRD)、扫描电子显微镜(SEM)等方法对材料进行了实验表征。实验研究了不同质量比例ZnO-NiO电池的性能,其中最佳组分7ZnO-3NiO在550℃开路电压为0.964 V,瞬时最大功率密度为644 mW/cm^(2)。结合半导体异质结和能带理论从机理上解释了该电池的性能表现,半导体异质结的应用和能带设计对未来低温燃料电池的研究应用具有重要的价值。

Low-temperature solid oxide fuel cell(LT-SOFC)has great commercial application prospect,but the electrolyte material with high performance at low temperature is still a great challenge.In this investigation,semiconductor heterojunction materials composed of n-type ZnO and p-type NiO were used in LT-SOFC.The samples were characterized by XRD and SEM.The performance of such cells with different proportion of ZnO-NiO were studied.The open circuit voltage of the best cell(7ZnO-3NiO)was 0.964 V and the instantaneous maximum power density was 644 mW/cm^(2) at 550℃.The application of heterojunction and energy band design have significant value for the research and application of future generation LT-SOFC.