Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (1): 14-18.DOI: 10.15541/jim20170115

Special Issue: 乘风破浪的新能源材料

• Orginal Article • Previous Articles     Next Articles

Influence of Impregnated Nano-scale LaNi0.6Fe0.4O3-δ Particles on the Oxygen Permeation Performance of Zr0.84Y0.16O2-δ-La0.8Sr0.2Cr0.5Fe0.5O3-δ Composite Membranes

LIU Xue-Jiao1,2, HE Zhen-Yu3, WU Hao1, LUO Ting1, MENG Xie1, CHEN Chu-Sheng3, ZHAN Zhong-Liang1   

  1. 1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Department of Materials Sciences and Engineering, University of Science & Technology of China, Hefei 230026, China;
  • Received:2017-03-15 Revised:2017-05-11 Published:2018-01-23 Online:2017-12-15
  • Supported by:
    National Natural Science Foundation of China (51672298)

Abstract:

This paper reported on the fabrication of tri-layered oxygen transport membranes, “porous|dense|porous” Zr0.84Y0.16O2-δ-La0.8Sr0.2Cr0.5Fe0.5O3-δ (YSZ-LSCF), by the tape casting, tape lamination and co-firing techniques. Catalytically active nano-scale particles of LaNi0.6Fe0.4O3-δ (LNF) were impregnated into the porous scaffolds. In order to quantatively determine the resistances of the oxygen reduction or evolution reactions against oxygen permeation, an additional dense YSZ layer was introduced inside the dense YSZ-LSCF permeation layer. Electrochemical measurements on the resulting five-layered solid oxide fuel cells showed a large reduction in the interfacial polarization resistances at the presence of these LNF catalysts, with the lowest values observed at the LNF loadings of 12wt%. In particular, the cathodic and anodic polarization resistances were 0.26 and 0.08 Ω·cm2 at 800℃, respectively. The oxygen permeation flux under the air/CH4 gradient was 7.6 mL/(cm2·min), which was 14 times higher than the measured value for the blank YSZ-LSCF membrane. Further impedance analysis indicated that the charge transfer step during oxygen reduction may limit the overall oxygen permeation process.

Key words: oxygen transport membranes, partial oxidation of methane, nanostructures, catalysts

CLC Number: