二硫化钼作为固体氧化物燃料电池阳极的制备和性能研究

The Preparation and Performance of Molybdenum Disulfide as Anode of Solid Oxide Fuel Cells

通过XRD表征了不同气氛中热处理后二硫化钼(MoS2)粉体的成分,采用直流四端子法测试了材料的电导率,利用丝网印刷法和还原气氛烧结制备了阳极,按质量比9︰1混合MoS2和Sc2O3稳定ZrO2(SSZ)粉体作为复合阳极材料,SSZ作为电解质,(La0.8Sr0.2)0.98MnO3与SSZ混合作为复合阴极材料制备电解质支撑的单电池,测试了其电化学性能。结果表明:MoS2在250ppmH2S-H2气氛中可以稳定存在,在850℃、50%H2-N2-H2S气氛中电导率为4.50S·cm-1。在850℃下,H2、250ppmH2S-H2气氛中单电池最大功率密度分别为21.32mW·cm-2、23.07mW·cm-2,并且在含硫气氛中放电时表现出良好的稳定性。

The composition of molybdenum disulfide(MoS2)powder after heat treatment in different atmospheres was characterized by XRD,the conductivity of the materials was tested by direct current four-terminal method.Scandia stabilized zirconia(SSZ)electrolyte supported single cell was prepared with Mo S2-SSZ mixture(mass ratio 9︰1)as anode material and(La0.8Sr0.2)0.98Mn O3 as cathode material.The anodes were prepared by screen printing and sintering in inert atmosphere.The electrochemical performance of the single cells was tested with the mixture of 250 ppm H2S-H2 as fuel.The results show that Mo S2 can exist stably in 250 ppm H2S-H2,and its conductivity was 4.50 S·cm-1 in 50%H2-N2-H2S at 850℃.The maximum power densities of the single cell in H2 and 250 ppm H2S-H2 were 21.32 m W·cm-2 and 23.07 m W·cm-2 at 850℃,respectively,and good stability was shown when the cells were working in a sulfur-containing atmosphere.