物理化学综合实验设计——纳米MnO_2作为超级电容器电极材料的研究

探索了将纳米 Mn O2 电极的电容性质研究作为物理化学综合实验的可行性 .循环伏安和恒电流充放电实验表明 ,纳米 Mn O2 电极具有较为优良的电容性质 ,用 10 m A和 5 0 m A恒流充放电时 ,Mn O2 电极的比电容分别为2 0 3.6 F/ g和 15 0 F/ g;分别连续充放 5 0周和 2 0 0周后 ,容量保持率仍分别为最初的 91.2 %和 90 .5 % .

Comprehensive Design of Physi-chemical Experiment--Study on Supercapacitor Employed MnO2 as Active Material of the Electrode

Nanoscaled MnO 2 is synthesized using oxidation of MnSO 4 by KMnO 4 and used as active material of electrode of supercapacitor. The measurements of cyclic voltammetry and constant current charge-discharge show that MnO 2 nano-particles have better electrochemical performances than common MnO 2. The specific capacities of the electrode are still 185.7 F/g and 135.7 F/g after charge-discharging for 50 cycles under 10 mA and 200 cycles under 50 mA, respectively.