Effects of humidity on Ba0.9Co0.7Fe0.2Nb0.1O3-delta cathode performance and durability of Solid Oxide Fuel Cells
Effects of humidity on Ba0.9Co0.7Fe0.2Nb0.1O3-delta cathode performance and durability of Solid Oxide Fuel Cells
复制标题
湿度对固体氧化物燃料电池Ba0.9Co0.7Fe0.2Nb0.1O3-δ阴极性能和耐久性的影响
DOI：
10.1016/j.ijhydene.2016.11.045
复制
发表时间：
2016
影响因子：
7.2
通讯作者：
Han Minfang
中科院分区：
文献类型：
--
作者：
Yang Zhibin;Liu Yahui;Chen Yu;Wang Jingle;Han Zongying;Zhu Yanmin;Han Minfang
Solid Oxide Fuel Cells (SOFCs) cathode often suffers from degradation resulting from different contaminations, such as water vapor from air, when operated under the realistic environments. In this work, we demonstrate an excellent water vapor tolerant Ba0.9Co0.7Fe0.2Nb0.1O3−δ(BCFN) cathode for SOFCs. The concentration effects of humidity on BCFN cathode performance including oxygen reduction reaction (ORR) kinetics and durability have been studied. The X-ray diffraction measurement indicates that humidity has no observable effects on BCFN materials. The electrochemical performance change in BCFN cathode seems to be more sensitive to the humidity at a lower temperature such as 650 °C than that at 800 °C. A low polarization resistance of 0.069 Ω cm2at 650 °C is obtained in 3% water vapor, and then the polarization resistance increases with increase of water vapor content. Furthermore, the electrochemical impedance spectra indicate that BCFN cathode contaminated by higher humidity can be recovered by purging air again.
