物理化学学报 >> 2003, Vol. 19 >> Issue (12): 1150-1153.doi: 10.3866/PKU.WHXB20031212

研究简报 上一篇    下一篇

新型超铁(VI)电池正极材料的制备及性能研究

杨红平;王先友;汪形艳;黄伟国;罗旭芳;卓海涛   

  1. 湘潭大学化学学院,湘潭 411105
  • 收稿日期:2003-05-29 修回日期:2003-07-18 发布日期:2003-12-15
  • 通讯作者: 王先友 E-mail:wxianyou@yahoo.com

Preparation and Performance of Electrode Materials for Super-iron (VI) Battery

Yang Hong-Ping;Wang Xian-You;Wang Xing-Yan;Huang Wei-Guo;Luo Xu-Fang;Zhuo Hai-Tao   

  1. College of Chemistry, Xiangtan University, Xiangtan 411105
  • Received:2003-05-29 Revised:2003-07-18 Published:2003-12-15
  • Contact: Wang Xian-You E-mail:wxianyou@yahoo.com

摘要: 研究了高铁酸钾和高铁酸钡在7 mol•L-1 KOH溶液中的溶解度和稳定性,发现随着温度升高,高铁酸盐溶解度逐渐增大,稳定性迅速下降;并用红外光谱(IR)、X射线衍射(XRD)和扫描电镜(SEM)对其结构进行了测试,发现所合成的高铁酸盐具有空间群为D2h(Pnma)的正交晶系结构,由粒径为50~165 nm的纳米-亚微米级粒子组成.用两种高铁酸盐材料制备Zn-超铁电池,放电试验结果表明Zn-BaFeO4电池比Zn-K2FeO4电池放电电位平台高170~220 mV,放电容量高一倍.

关键词: 高铁酸盐, 结构测试, 稳定性, 溶解度, 正极材料, 超铁电池

Abstract: The solubility and stability of potassium ferrate(VI) and barium ferrate(VI) in 7 mol•L-1 KOH solution were investigated. It was found that the solubility of ferrates (VI) compounds increased and the stability decreased with increasing temperature. The structures and morphology of the potassium ferrate and barium ferrate were examined by IR、XRD and SEM, and the results showed that they were orthorhombic crystal with space group D2h(Pnma) and consisted of sub-micron to nanometer particles(50~165 nm). The discharge results of Zn-BaFeO4 and Zn-K2FeO4 batteries displayed that the former has a double discharge capacity than the latter, and the discharge voltage plateau of the former is 170~220 mV higher than that of the latter.

Key words: Ferrates, Structure examination, Stability, Solubility, Positive electrode material, Super-iron battery