High reactive Ce0.8Sm0.2O1.9 powders via a carbonate co-precipitation method as electrolytes for low-temperature solid ozide fuel cells
Homogenous Ce0.8Sm0.2O1.9 (SDC) powders, ～12 nm in size, were synthesized via carbonate co-precipitation at low processing temperature with dilute cation and carbonate solutions. The powders showed high sinterability and 98% of theoretical density was obtained when they were sintered at 1100℃ for 5 h. The sintered SDC ceramics had high conductivity and low activation energy for conduction. The conductivity was 0.022 S/cm at 600℃ and the activation energy was only 0.66 eV. Further, single cells were fabricated using the powders as precursors for the electrolyte and the anode. Maximum power density of 400 mW/cm2 was achieved at 600℃ when humidified hydrogen and air were used as the fuel and the oxidant, respectively. The high fuel cell performance, high conductivity, low activation energy and high sinterability showed that SDC powders precipitated with dilute solutions were promising for application in low-temperature solid oxide fuel cells.
Doped ceria Carbonate co-precipitation Sintering Electrical conductivity Low-temperature solid ozide fuel cells
Dong Ding Beibei Liu Zina Zhu Shuai Zhou Changrong Xia
Laboratory for Renewable Clean Energy, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026 Anhui, China
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
896-899
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）