Sn_(0.97)Sc_(0.03)P_2O_7的中温电性能研究  

Intermediate temperature electrical properties of Sn(0.97)Sc_(0.03)P_2O_7

作　　者：朱剑莉[1] 王洪涛[2] 马桂林[2] 

机构地区：[1]淮安信息职业技术学院,江苏淮安223003 [2]苏州大学材料与化学化工学部,江苏苏州215123

出　　处：《功能材料》2012年第B08期133-135,140,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20771079)

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。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 02 atmosphere. The H2/air fuel cell using Sn0.97Sc0.03P2O7 as an electrolyte generated the maximum power density of 11.16mW/cm2 at 150℃.

关 键 词：Sn0.97SC0.03P2O7 交流阻抗 电导率 燃料电池 

分 类 号：TQ133.3[化学工程—无机化工] O614.33[理学—无机化学]