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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
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)。
