CNT复合对水热合成纳米MnO_2超电容性能的影响

Influences of CNT compounding on supercapacitive performance of nano-MnO_2 derived from hydrothermal method

以乙酸锰[Mn(OAc)2·4 H2O]和过硫酸铵[(NH4)2S2O8]为反应物,通过水热法合成出纳米MnO2材料和纳米MnO2/碳纳米管(CNT)复合材料。采用X射线衍射和透射电镜方法对材料进行了表征,用循环伏安、交流阻抗和恒流充放电方法研究了纳米MnO2和纳米MnO2/CNT在1 mol/L LiOH电解质中的电化学性能。电化学测试结果表明:碳纳米管复合改善了纳米MnO2的循环稳定性。

Nanostructured MnO2 material and nanostructured MnOJcarbon nanotube （CNT） composite material were synthesized via a hydrothermal route using Mn（OAc）2.4 H20 and （NH4）2S208 as reactants. The materials were char- acterized by X-ray diffraction and transmission electron microscopy techniques. Its electrochemical performances in 1 mol/L LiOH electrolyte were investigated by cyclic voltammetry, AC impedence and galvanostatic charge/discharge methods. Electrochemical experimental results demonstrate that CNT compounding can improve the cyclic stability of nano-MnO2.