摘要
用简化工艺的化学氧化法快速合成电池级纳米铁酸盐材料,并研究了制备过程中吸收碱液浓度对产品产率和纯度的影响。采用循环伏安法研究六价铁在碱性电解液中的还原特性,比较了Zn K2FeO4,Zn BaFeO4及Zn SrFeO4电池和添加不同添加剂的Zn BaFeO4电池的放电性能。研究结果表明:高铁酸钾在7mol/LKOH溶液中还原电位在0.2V左右,溶液电极过程主要受扩散控制;以BaFeO4作为超铁(VI)电池的正极材料时,电池的放电容量最大,尤其是添加3%KMnO4+2%Ba(OH)2作添加剂的Zn BaFeO4电池,其综合性能最佳。
The nano-size ferrate (VI) was prepared by improved chemical oxidation, and the effects of alkali absorption concentration on the purity and productivity of several kinds of nano-size ferrates were investigated. The electrochemical performances of ferrates were studied by mean of cyclic voltammetry and discharge experiments. The results show that the reduction potential of ferrate (VI) in 7 mol/L KOH solution is about 0.2 V and the electrode process of potassium ferrate solution is mainly controlled by diffusion. By comparing discharge performance of zinc-super iron batteries with different ferrates as positive materials, it is found that Zn-BaFeO_4 battery has larger discharge capacity than other super-iron(VI) batteries, especially when 3% KMnO_4+2% Ba(OH)_2 (mass fraction) were used as additives.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第3期402-407,共6页
Journal of Central South University:Science and Technology
基金
湖南省自然科学基金重点资助项目(00JJY1002)
关键词
化学氧化法
高铁酸盐
循环伏安法
超铁电池
hypochlorite oxidation
ferrate (VI)
cyclic voltammetry
super-iron battery
