碳纸/纳米MnO2复合电极材料的循环伏安研究

Cyclic voltammetry study of carbon paper/nanometer MnO2 composite electrode material

将碳纸与氧化还原反应法制备的纳米MnO2通过液相沉积法形成新的复合电极材料,采用循环伏安和恒流充放电测试技术对复合电极材料进行测试分析,研究结果表明:碳纸/纳米MnO2复合电极材料呈花瓣状开放结构,有利于提高复合电极的比表面积;碳纸基体沉积1 h制备的电极具有最好的稳定性,沉积3 h制备的电极样品稳定性最差,所以沉积时间过长不利于电极电容性的稳定;氧化还原混合溶液浓度为0.2 mol/L,碳纸基体沉积时间1 h的条件下制备的薄膜电极样品的性能最优。

Nano-sized MnO2 prepared by redox reaction was deposited on carbon paper substrate by liquid phase deposition to form composite electrode material.The composite electrode materials were tested and analyzed by cyclic voltammetry(CV)and constant current charge and discharge test.The results show that carbon paper/nanometer MnO2 composite electrode material with petal-like open structure is beneficial to increase the specific surface area of the composite electrode;the stability of the composite electrode deposing for 1 h is the best,and the stability of the electrode samples deposing for 3 h is the worst,so too long deposition time is not conducive to the stability of the electrode capacitance;on the condition of the redox mixed solution of 0.2 mol/L and carbon paper substrate deposition for 1 h,the thin film electrode materials have the most excellent performance.