立方形锰氧化物的制备及其电容特性研究

摘要

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 cha-racterize the structure and surface morphology.Results:The results show that this hierarchical structure is composed of nanoparticles 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 testing indicated 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 manganic oxide is suitable for electrical supercapacitor material for their simple preparation process and easily achieved industrial production.