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2006 , Vol. 21 >Issue 3: 612 - 618

DOI: https://doi.org/10.3724/SP.J.1077.2006.00612

研究论文

改进的柠檬酸法制备 LSGM和 LSGMC8.5及其性能比较

  • 徐国跃 ,
  • 曹敏 ,
  • 刘波 ,
  • 承新 ,
  • 周健
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  • 南京航空航天大学材料科学与技术学院, 南京 210016

收稿日期: 2005-06-24

  修回日期: 2005-09-05

  网络出版日期: 2006-05-20

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Comparison of LSGM and LSGMC8.5 Synthesized by Advanced Pechini Method

  • XU Guo-Yue ,
  • CAO Min ,
  • LIU Bo ,
  • CHENG Xin ,
  • ZHOU Jian
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  • College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received date: 2005-06-24

  Revised date: 2005-09-05

  Online published: 2006-05-20

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摘要

用改进的柠檬酸法合成了具有钙钛矿结构的LSGM(La0.9Sr0.1Ga0.85Mg0.15O3-δ)和Co掺杂的LSGMC8.5(La0.9Sr0.1(Ga0.9Co0.1)0.85Mg0.15O3-δ). 并从XRD、DTA-TG曲线、交流阻抗谱、电导率、密度和化学稳定性等方面比较了LSGM 和LSGMC8.5的性能. 从而探讨了Co掺杂对于LSGM性能的影响. 结果表明相对于LSGM, Co的掺杂使立方钙钛矿结构的形成温度由1400℃降低到1300℃左右, 离子电导率由3.85×10-2上升到5.38×10-2S/cm, 密度由理论密度的95%上升到99%. 因此Co的掺杂使LSGM的各方面性能都有了一定的提高, LSGMC8.5比LSGM更适合做中温SOFC的电解质材料.

关键词： 改进的柠檬酸法; 燃料电池; Co掺杂; LSGM

本文引用格式

徐国跃 , 曹敏 , 刘波 , 承新 , 周健 . 改进的柠檬酸法制备 LSGM和 LSGMC8.5及其性能比较[J]. 无机材料学报, 2006 , 21(3) : 612 -618 . DOI: 10.3724/SP.J.1077.2006.00612

Abstract

The perovskite-type LSGM(La0.9Sr0.1Ga0.85Mg0.15O2.875) and Co-doped
LSGMC8.5 (La0.9Sr0.1(Ga0.9Co0.1)Mg0.15O3-δ) were synthesized by the advanced Pechini method. Their properties were compared by the analysis of XRD, DTA-TG, impedance spectra, conductivity and density. It showed that Co doping decreased the forming temperature of cubic perovskite structure from 1400℃ to 1300℃, and increased the fractional density from 95% to 99%. The conductivity of the LSGMC8.5 sintered at 1400℃ for 6h is 5.38×10-2S/cm. So the Co-doped LSGMC8.5 is more suitable for IT-SOFC.

Key words： advanced pechini method; fuel cell; Co-doped; LSGM

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