立方形锰氧化物的制备及其电容特性研究

Preparation and Its Electrochemical Capacitance Performance of Manganese Oxides Cube

目的 :制备立方形锰氧化物高电容超级电容器材料。方法:采用水热结合热分解的方法,制备结构均一的锰氧化物的立方体结构;利用X射线衍射仪(XRD)、扫描电镜(SEM)、透射电镜(TEM)等方法对样品进行了微观表征,使用自制的三电极体系对电极材料进行了循环伏安(CV)、充放电性能和循环稳定性研究。结果:检测结果显示,所制备的立方体结构是由一个个约为10 nm的小颗粒自组装形成的,颗粒之间具有丰富的微孔结构。电化学测试显示在电流密度为1 A/g下,担载量为2 mg/cm2的条件下,电极材料的放电比容量高达318 F/g,其作为正极材料具有比较好的电容特性。结论:此方法制备过程简单,容易工业化生产,该立方形的锰氧化物较适合作为超级电容器的正极材料。

Objective： To prepare cube manganic oxide with super high electrical capacity. Method： The uni-form cube manganic oxide was prepared by a facile hydrothermal method. XRD SEM and TEM are used to eha-racterize the structure and surface morphology. Results： The results show that this hierarchical structure iscomposed of nanopartieles with size of around 10 nm. The electrical capacity material was also studied by CV,charge - discharge and cycle stability curves by three - electrode system. The results of electrochemical testingindicated that the specific capacitance is 318 F/g at current density of 1 A/g with a high load of 2 mg/cm2.Conclusion： These results indicate that this cube manganie oxide is suitable for electrical supereapaeitor materialfor their simple preparation process and easily achieved industrial production.