Sn0.95Al0.05P2O7/PTFE复合电解质的制备及其中温电性能  

Preparation and intermediate temperature electrical property of polytetrafluoroethylene/Sn_(0.95)Al_(0.05)P_2O_7 composite electrolyte

作　　者：孙林[1] 王洪涛[1] 李慧泉[1] 武海[1] 柴兰兰[1] 

机构地区：[1]阜阳师范学院化学与材料工程学院,安徽环境污染物降解与监测省级重点实验室,阜阳236037

出　　处：《化工新型材料》2017年第12期130-132,136,共4页New Chemical Materials

基　　金：国家自然科学基金青年项目(51402052);国家重点实验室和国家工程(技术)研究中心开放基金(2015019);安徽省省级基金项目(1608085MB34;2014KJ008);阜阳师范学院自然科学研究项目(2017FSKJ03ZD;2014FSKJ01ZD)

摘　　要：合成了有机-无机复合电解质5%(摩尔分数)铝掺杂的焦磷酸锡(Sn_(0.95)Al_(0.05)P_2O_7)/聚四氟乙烯(PT-FE)(简称SAPO/PTFE)。XRD测试表明,SAPO和PTFE复合没有发生反应生成新物质,热分析表明样品稳定性良好;SEM图表明样品致密性良好。采用电化学工作站对SAPO/PTFE的中温电性能(50~250℃)进行了研究。结果表明,SAPO/PTFE电导率在湿润氮气气氛中175℃达到最大值2.8×10^(-2)S/cm。湿润氧气气氛下的水蒸汽浓差电池说明质子导电性在复合电解质中存在。H_2/O_2燃料电池性能测试表明,在0.64V时对应最大输出功率密度为39.8mW/cm^2。Firstly,a new organic-inorganic composite electrolyte Sn0.95Al0.05P2O7/PTFE was prepared.XRD showed that there were only peaks corresponding well to Sn0.95Al0.05P2O7and PTFE,without any formation of other substances.TGA proved that the sample had a high stability.SEM images showed that the composite electrolyte was sufficiently dense.The intermediate temperature conduction behaviors were investigated by AC impedance spectroscopy in the temperature range of 50-250℃.The highest conductivity was observed to be 2.8×10^-2S·cm^-1 for SAPO/PTFE in wet nitrogen at 175℃.It was found that the electrolyte exhibited the existence of protonic conduction when the oxygen partial pressure was high.H2/O2fuel cell generated the maximum power density of 39.8mW·cm^-2 at 0.64V.

关 键 词：焦磷酸锡 复合电解质 电导率 燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]