HOU Zhaoyu, WANG Zhongxu, YANG Lili, ZENG Fanrong, WANG Shaorong
(School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China)
Abstract: 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 MoS2-SSZ mixture (mass ratio 9︰1) as anode material and (La0.8Sr0.2)0.98MnO3 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 MoS2 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 mW·cm-2 and 23.07 mW·cm-2 at 850 ℃, respectively, and good stability was shown when the cells were working in a sulfur-containing atmosphere.
Key words: molybdenum disulfide; composite anode materials; resistance to sulfur poisoning