高级检索
无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

硫酸高铈对磷硅酸盐凝胶质子导体的改性处理

胡琳娜1, 何军花1, 彭会芬2, 张跃兴1,3   

  1. （1. 河北工业大学 化工学院, 天津 300130; 2. 河北工业大学 材料学院, 天津 300130; 3.中国船舶重工业集团公司 第七一八研究院, 邯郸 056027）
  • 收稿日期:2009-03-02 修回日期:2009-04-24 出版日期:2009-11-20 网络出版日期:2010-04-22

Modification of Ce(SO4)2 on Phosphosilicate Gels used as Proton Conductors

HU Lin-Na1, HE Jun-Hua1, PENG Hui-Fen2, ZHANG Yue-Xing1,3   

  1. (1. School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China; 2. School of Material Science & Engineering, Hebei University of Technology, Tianjin 300130, China; 3. The 718th Research Institute, China Shipbuilding Industry Corporation, Handan 056027, China)
  • Received:2009-03-02 Revised:2009-04-24 Published:2009-11-20 Online:2010-04-22

PDF (PC)

1497

被引次数

3 | 3

摘要： 研制兼具较高化学耐久性和质子电导率的电解质是提高燃料电池效率的关键. 本研究在利用溶胶凝胶法制备磷硅酸盐干凝胶的基础上, 发现添加Ce(SO4)2能明显提高凝胶的质子电导率, 并且Ce(SO4)2含量为0.81wt%时达到最大值（σ100=1.25S/m, σ130=2.11S/m）. 与未添加任何Ce(SO4)2的干凝胶相比, 质子电导率提高了70%以上. 干燥的氩气环境使凝胶的电导率下降约20%（σ100=1.06S/m, σ130=1.68S/m）. 热分析以及NMR谱测试结果表明：添加Ce(SO4)2后材料的水分子保持能力增强, 形成了较多有利于质子传输的PO43-孤立磷酸单元以及含有一个桥氧的Si—O—P和P—O—P结构单元.

关键词: 质子导体, 溶胶-凝胶法, 磷硅酸盐凝胶, Ce(SO4)2

Abstract: Preparation of proton conductors with good chemical durability and high proton conductivity is prerequisite for increasing efficiency of medium temperature fuel cells. In this research, new type of proton conductors were synthesized by adding Ce(SO4)2 to the phosphosilicate gels through sol-gel process. The results prove that adding Ce(SO4)2 can apparently increase proton conductivity of the gels, which reaches the maximum conductivity with the Ce(SO4)2 content of 0.81%, i.e. σ100=1.25S/m, σ130=2.11S/m. These values are 70% higher than those without adding Ce(SO4)2. The proton conductivity of the gels will decrease by 20% in dry argon atmosphere, that is, σ100=1.06S/m, σ130=1.68S/m. Thermal analysis reveals that introduction of Ce(SO4)2 results in an increase in water-retention ability of the gels. Furthermore, NMR spectra indicate that there forms more PO43- isolated phosphate structure units containing no bridgeoxygen (Q0) and Q1 structure units containing one bridgeoxygen like Si—O—P and P—O—P in the Ce(SO4)2-containing gels. These structure units are favorable to proton transportation, which increase the proton conductivity of the gels.

Key words: proton conductors, sol-gel method, phosphosilicate gels, Ce(SO4)2

中图分类号: