| NH4PO3-SiO2复合电解质的溶胶凝胶法制备和导电性能 |
| Electrical Performance of NH4PO3-SiO2 Composite Electrolytes Prepared by a Sol-gel Method |
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| 摘要: 用溶胶凝胶法制备了复合固体电解质xNH4PO3-SiO2(x=1，2，4)，并研究了该电解质在125～250 ℃范围内的导电性能。复合电解质的相结构分析表明，NH4PO3和SiO2在溶胶凝胶法制备过程中没有发生化学反应;复合电解质的电导率随着NH4PO3含量增大而提高，并与NH4PO |
| 关键词: 复合电解质 NH4PO3-SiO2 质子导体 溶胶凝胶 中温燃料电池 |
| 基金项目: |
| Abstract: Proton-conductive composite electrolytes consisting of xNH4PO3-SiO2(x=1，2，4) were synthesized by a sol-gel method. X-ray diffraction investigation showed that NH4PO3 was chemically stable in the process of sol-gel preparation. The conductivity of the resulted composites was measured with impedance spectroscopy. The conductivity was improved by increasing the molar ratio of NH4PO3. Meanwhile the activation energy for conductivity decreased with NH4PO3 content. This indicates that NH4PO3 is responsible for the high conductivity and SiO2 serves as a supporting matrix， although the conductivity was slightly affected by the size of SiO2 particles. The proton conductivity was dramatically enhanced by increasing the water content， indicating that the effect of water is significant. |
| Keywords: composite electrolyte NH4PO3-SiO2 proton conductor sol-gel intermediate temperature fuel cell |
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| 彭小波,陈西林,郑海波,程继贵,夏长荣.NH4PO3-SiO2复合电解质的溶胶凝胶法制备和导电性能[J].无机化学学报,2007,23(9):1567-1571. |
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