CoTiO3纳米粉体的合成及其对MnO2电极材料的改性作用

采用溶胶-凝胶法制得钙钛矿型CoTiO₃纳米粉体，借助XRD、TEM以及循环伏安测试对其性质进行了表征。不同量的所制样品用于MnO₂电极的物理掺杂，进行了深度恒流放电、循环伏安和充放电测试。结果表明在40%KOH电解质溶液中，样品掺杂量为5%时改性效果较好。纳米CoTiO₃参与了电极反应，抑制了电化学惰性物质Mn₃O₄的生成，从而有效地改善MnO₂的放电性能，放电容量较I.C

Synthesis of Nanophase CoTiO3 and its Influence on MnO2 Electrode

Nanosized CoTiO 3 powder was prepared by a sol-gel meth od and characterized by XRD,TEM and C V tech-niques.MnO 2 electrodes modified with different amounts of nanophase CoTiO 3 were physically fabricated and their electrochemical properties were studied by means of galvonostatic charge /discharge and CV experiments.The re-sults indicate that the discharge performances of MnO 2 electrodes modified with nanophase CoTiO 3 are better,and nanophase CoTiO 3 which is involved in electrode reaction,restrains the formation of elec trochemically inactive Mn 3 O 4 .The discharge capacity of MnO 2 electrodes modified with 5.0%nanop hase CoTiO 3 is in average 50%higher than that of I.C.No.1EMD in 40%KOH electrolyte,and its charge /discharg e efficiency is much improved.