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Direct Preparation of Ce0.8Sm0.2O1.9 Powders Oxidized With H2O2 for Low Temperature SOFCs Application

[+] Author Affiliations
Jianbing Huang, Zongqiang Mao, Lizhai Yang, Ranran Peng, Ruifeng Gao

Tsinghua University, Beijing, China

Bin Zhu

Royal Institute of Technology, Stockholm, Sweden

Paper No. FUELCELL2005-74027, pp. 295-298; 4 pages
doi:10.1115/FUELCELL2005-74027
From:
  • ASME 2005 3rd International Conference on Fuel Cell Science, Engineering and Technology
  • 3rd International Conference on Fuel Cell Science, Engineering and Technology
  • Ypsilanti, Michigan, USA, May 23–25, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-3764-5 | eISBN: 0-7918-3757-2
  • Copyright © 2005 by ASME

abstract

A novel method was developed to prepare fine doped ceria (DCO) powders directly. Ceria doped with 20 mol. % of samarium (Ce0.8 Sm0.2 O1.9 , SDC) was prepared by in-situ oxidization of hydroxide precipitates with H2 O2 in the solutions. The resultant powder desiccated at 85°C overnight was characterized by X-ray diffraction (XRD), thermogravimetry /differential thermal analysis (TG/DTA), and transmission electron microscopy (TEM). The XRD pattern showed that the as-dried SDC powder is single phase with a cubic fluorite structure like that of pure CeO2 . An anode-supported SOFC was also fabricated based on SDC and 20wt. % (62mol. %Li2 CO3 –38 mol. %K2 CO3 ) composite electrolyte, LiNiO2 as cathode and NiO as anode, by cold pressing. Using hydrogen as the fuel and air as the oxidant, the I-V and I-P characteristics exhibit excellent performances and the maximum power densities are about 696, 469, 377 and 240 mWcm−2 at 650, 600, 550 and 500°C, respectively.

Copyright © 2005 by ASME

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