【摘要】 采用固相法合成了Sn0.97Sc0.03P2O7样品,采用浓差电池、交流阻抗等电化学方法对该样品在50～250℃下的电性能进行了研究。结果表明,该样品在湿润H2气氛中,温度为175℃时,电导率达到最大值1.51×10-2S/cm。水蒸气浓差电池结果表明,样品在湿润H2气氛下具有一定程度的氧离子导电性,而在湿润O2气氛下样品主要表现为质子导电。以该样品为燃料电池固体电解质,组装氢-空气燃料电池,在150℃时,其最大输出功率密度为11.16mW/cm2。更多还原

【Abstract】 Sn0.97Sc0.03P2O7 was synthesized by a solid-state reaction method,and the conduction behaviors were investigated by some electrochemical methods including AC impedance spectroscopy,gas concentration cells in the temperature range of 50-250℃.The highest conductivity was observed to be 1.51×10-2S/cm under wet H2 atmosphere at 175℃.The result of water vapor concentration cell indicated that the sample has the existence of oxide ionic conduction under wet H2 atmosphere and mainly protonic conduction under wet O2 atmosphere.The H2/air fuel cell using Sn0.97Sc0.03P2O7 as an electrolyte generated the maximum power density of 11.16mW/cm2 at 150℃.更多还原