H_2S源铈基固体氧化物燃料电池电化学性能研究

Study of electrochemical properties of SOFC based on ceria electrolyte utilizing H_2S as fuel

采用甘氨酸-硝酸盐燃烧法制备出(CeO2)1-2x(Sm2O3)x固体电解质(简记作SDC)薄膜,以Ni-SDC、Ag分别作为固体氧化物燃料电池阳、阴极.在中温(650～750℃)条件下,该燃料电池对含H2S有害气体的脱除率最高可达到45%.在电流密度-电压(电功率密度)特性曲线中,当Sm:Ce=2:8时,作为氢源的H2S气体可使电池的开路电压为0.59V,电功率密度最高达到6.2mW/cm2.Ni-SDC可作为H2S-O2此类燃料电池的阳极替代材料.

Glycine-nitrate combustion process （abbr, GNP） was adopted to prepare （CeO2）1-2x（Sm2O3）x（abbr, SDC） electrolyte membrane. In the range of 650-750℃, the removal of H2S was up to 45% while 10%H2S＋90%N2 flow was used as anode fuel and air as cathode feed in the configuration such as Ni-SDC/SDC/Ag. On the other hand, the open circuit voltage was 0.59V and the maximum power density was 6.2mW/cm^2 respectively in the SOFC configuration concerned above when the solid electrolyte composition ratio of Sm to Ce was equal to 0.2 ： 0.8. As a preliminary result, a Ni-SDC anode was a alternative material for H2S-air SOFC.