کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
195274 | 459811 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and characterization of NH4PO3 based composite with superior proton conductivity for intermediate temperature fuel cells Synthesis and characterization of NH4PO3 based composite with superior proton conductivity for intermediate temperature fuel cells](/preview/png/195274.png)
In this work, we prepared NH4PO3/MO2 (MSi, Ti) composite materials with various amounts of TiO2 using a sol–gel method, which are potential for application as electrolytes for intermediate temperature fuel cells (150–250 °C). The effect of the amount of TiO2 on the conductivities of the composite was investigated systematically by an impedance spectroscopy within the temperature range of 50–275 °C under different atmospheres. The composite SiTiO10APP (10 mol% TiO2) showed high proton conductivity, 0.001–0.043 S cm−1 at 150–250 °C. The maximum conductivities are 0.043 S cm−1 at 225 °C under humid H2 and 0.0085 S cm−1 at 175 °C under humid air, respectively. A thermogravimetric analysis showed the composite had high thermal stability below 300 °C. Moreover, it was found that the microstructure has significant effect on the conductivity of the composites at higher temperature.
Journal: Electrochimica Acta - Volume 53, Issue 22, 20 September 2008, Pages 6417–6422