Low temperature hydrothermal synthesis of nano-sized manganese oxide for supercapacitors
Low temperature hydrothermal synthesis of nano-sized manganese oxide for supercapacitors
复制标题
DOI：
10.1016/j.electacta.2012.01.095
复制
发表时间：
2012-04
影响因子：
6.6
通讯作者：
Jingling Liu;Li-zhen Fan;X. Qu
中科院分区：
文献类型：
--
作者：
Jingling Liu;Li-zhen Fan;X. Qu
以高锰酸钾为氧化剂，乙醇为还原剂，采用简单的水热法在60°C的低温下合成了纳米氧化锰。用X射线衍射和扫描电镜对所制备的氧化锰的结构和表面形貌进行了表征。所得锰氧化物为无定形球形，粒径约为100nm。通过循环伏安法和恒电流充放电循环研究了纳米结构锰氧化物电极在1M Na2SO4中的电容特性。氧化锰不仅表现出198Fg−1的最大比电容，而且还表现出优异的倍率性能和良好的循环稳定性。
The nano-structured manganese oxide was synthesized by a simple hydrothermal route at a very low temperature of 60°C using potassium permanganate as oxidant and ethanol as reductant. The structure and surface morphology of the as-prepared manganese oxide were characterized by means of X-ray diffraction and scanning electron microscopy. The obtained manganese oxide was of amorphous and spherical with a particle size of about 100nm. The capacitive characteristics of the nano-structured manganese oxide electrodes were investigated by means of cyclic voltammetry and galvanostatic charge–discharge cycling in 1M Na2SO4. The manganese oxide exhibited not only a maximum specific capacitance of 198Fg−1, but also excellent rate capability and good cycle stability.