嵌入电极反应循环伏安曲线的理论研究

Theoretical Studies on the Cyclic Voltammograms of Intercalation Electrode Reactions

嵌入电极反应的循环伏安图一般具有氧化峰和还原峰间距很大的特点,并且往往要求采用非常低的电位扫描速度.本研究基于嵌入电极反应的热力学方程和电荷传递动力学方程,对其循环伏安曲线进行了理论处理,讨论了嵌入电极反应热力学参数b,动力学参数D和k,电位扫描速度v,及电极和溶液电阻对循环伏安曲线的影响,解释了实验得到的嵌入电极反应循环伏安曲线的特殊性.

The cyclic voltammgrams of intercalation electrode reactions usually show a large potential difference between the oxidation peak and the reduction peak. A very low potential sweep rate is often required in the cyclic voltammetric measurement. On the basis of the thermodynamic equation and the charge transfer kinetic equation of the intercalation electrode reactions, its cyclic voltammograms are treated theoretically. In the treatment, the effects of such parameters as the thermodynamic parameter b, kinetic parameters D and k, potential sweep rate v, and the electrode resistance on the cyclic voltammograms are discussed. The features of the cyclic voltammograms are explained according to the theoretical calculation.