纳米SrTiO_3对高铁酸盐电化学性能影响研究  

Nanometer SrTiO_3 Effect on Electrochemical Performance of Ferrate Electrode

作　　者：王宏丽[1] 赖琼钰[1] 郝艳静[1] 陈元端[1] 吉晓洋[2] 

机构地区：[1]四川大学化学学院,成都610064 [2]四川大学分析测试中心,成都610064

出　　处：《无机化学学报》2006年第6期1108-1112,共5页Chinese Journal of Inorganic Chemistry

基　　金：四川省基础应用研究基金资助项目(No.川教科9902)。

摘　　要：O引言传统的碱性锌锰电池采用MnO2作为电池的正极活性物质，虽然其生产技术成熟、性能稳定。但存在放电容量较小、活性物质利用率较低等不足，故寻求高性能、无污染的电极材料成为一个新的研究热点。1999年以色列科学家Licht等发现Fe（Ⅵ）化合物能取代碱性Zn-MnO2中的MnO2作为电池的正极材料，阐明了Fe（Ⅵ）在参与放电反应时可以得到3个电子被还原为Fe（Ⅵ），半反应为：Two ferrates, K2FeO4 and BaFeO4, had been prepared and characterized by XRD, IR and SEM. The electrochemical tests of the samples were carried out in the voltage range of 0.8-2.0 V and current density of 0.5-3.0 mA·cm^-2. The results indicated that performance of Zn-BaFeO4 battery was superior to that of Zn-MnO2 and Zn-K2FeO4 batteries. Nanometer SrTiO3 prepared by Sol-gel methode with different ratio was added to the BaFeO4 cathode in order to improve the discharge performance. The discharge capacity of the BaFeO4 cathode was increased from 224 mAh·g^-1 to 246 mAh· g^-1 by addition of 5% nanometer SrTiO3. The reason of enhancing BaFeO4 electrochemical performance was discussed.

关 键 词：K2FeO4 BaFeO4 SRTIO3 电化学性能 

分 类 号：O614.23[理学—无机化学] O614.411[理学—化学]