【摘要】 研究了高铁酸钾和高铁酸钡在7mol·L-1KOH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50～165nm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170～220mV,放电容量高一倍.更多还原

【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.更多还原