纳米锰氧化物超级电容器电极材料的制备与性能  

Preparation of nano manganese oxides and their properties as supercapacitor electrode material

作　　者：雷天赐[1] 邬冰[1] 高颖[1] 

机构地区：[1]哈尔滨师范大学化学化工学院,黑龙江哈尔滨150025

出　　处：《化学工程师》2015年第3期5-7,20,共4页Chemical Engineer

基　　金：黑龙江省自然科学基金(B201002);哈尔滨市科技创新人才专项资金项目(2010RFXXG018)

摘　　要：采用模板和液相沉淀两种方法制备了锰的氧化物,XRD的测试结果表明,两种方法制备的锰氧化物分别为MnO2和Mn3O4。从TEM图可以看出,模板法制备的MnO2为直径为5-8nm左右的颗粒,而用液相沉淀制备的Mn3O4形貌为直径约为10nm左右的纤维棒。循环伏安和充放电测试结果都表明MnO2是更好的超电容器的电极材料。MnO2和Mn3O4在200mA·g^-1电流密度下的放电比电容分别为157.5和145.0F·g^-1,经过500次充放电后比电容分别为132.5和125.0F·g^-1,充放电效率分别为64.9%和63.7%。The preparation of manganese oxides are using two kinds ot methods, templates and liquid precipitation. The XRD results show that manganese oxides prepared by two methods are MnO2 and Mn3O4 respectively. The TEM images of MnO2 shows the diameter of the particle is about 5-8nm and Mn3O4 is about 10 nm diameter rods. Cyclic voltammetry and charge-discharge test results indicate that MnO2 electrode material for supercapacitors is better than Mn3O4. The value of specific capacitance at 200mA·g^-1 is 157.5 and 145.0F·g^-1 for MnO2 and Mn3O4, respectively. The specific capacitance of MnO2 and Mn3O4 decrease to 132.5 and 125.0F·g^-1 after 500 cycles and the charge-discharge efficiency of current are 64.9% and 63.7%, respectively.

关 键 词：锰氧化物 纳米颗粒 超级电容器 

分 类 号：TM533[电气工程—电器]