物理化学学报2017，Vol.33Issue(2)：386-392,7.DOI:10.3866/PKU.WHXB201610104
管式电解质支撑型直接碳固体氧化物燃料电池的浸渍法制备及电性能
Fabrication and Performance of Tubular Electrolyte-Supporting Direct Carbon Solid Oxide Fuel Cell by Dip Coating Technique
摘要
Abstract
Tubular electrolyte-supporting solid oxide fuel cells (SOFCs) are particularly suitable for fundamental research of direct carbon SOFCs (DC-SOFCs) because they exhibit high stability,have simple seal requirements and are compatible with a variety of electrode materials.We have developed a dip-coating technique for the simple preparation of tubular electrolyte-supporting SOFCs using tubular yttria-stabilized zirconia (YSZ) electrolyte membrane substrates.Single SOFCs were assembled with a cermet consisting of gadolinium doped ceria (GDC) mixed with silver as both the cathode and anode.The single cells were tested with humidified hydrogen and 5％ Fe-loaded activated carbon (w,mass fraction) as the fuel.Ambient air was used as the oxidant.The open-circuit voltages were comparable to the theoretical values and the scanning electron microscopy (SEM) results showed that the electrolyte membrane was quite dense.The cell that used activated carbon as fuel exhibited a maximum power density of 280 mW· cm-2 at 800 ℃,which was close to that of a cell that used hydrogen as fuel (330 mW· cm 2).The results of impedance spectroscopy showed that the performance of the cells was mainly influenced by the electrolyte ohmic resistance.The discharge time of the DC-SOFC at a constant current of 1 Awas 2.1 h,which represented a fuel utilization of 36％.The performance of the DC-SOFC with reloaded fuel was nearly identical to its initial performance,which indicated that the YSZ electrolyte membrane substrate was stable when used in the DC-SOFCs.The degradation performance of the DC-SOFC during the discharge test was also analyzed.关键词
固体氧化物燃料电池/直接碳/电解质支撑/钇稳定化氧化锆/浸渍法Key words
Solid oxide fuel cell/Direct carbon/Electrolyte-supporting/Yttria stabilized zirconia/Dip coating分类
化学化工引用本文复制引用
谢永敏,王晓强,刘江,余长林..管式电解质支撑型直接碳固体氧化物燃料电池的浸渍法制备及电性能[J].物理化学学报,2017,33(2):386-392,7.基金项目
The project was supported by the National Natural Science Foundation of China (21276097,21567008,21263005).国家自然科学基金(21276097,21567008,21263005)资助项目 （21276097,21567008,21263005）
