中文摘要：

以含有Fe^3＋/Fe^2＋离子对的H2SO4溶液为电解液，以多孔炭做电极材料，就Fe^3＋/Fe^2＋离子对在多孔炭纳米孔隙中的电化学行为及准电容效应进行了探讨．循环伏安测试结果表明．Fe^3＋/Fe^2＋离子对在多孔炭电极纳米孔隙中发生了可逆的电化学反应．恒流充放电结果发现，加入Fe^3＋/Fe^2＋使得充放曲线出现对称的充放电平台，有效地提高了电化学电容器（EC）的电能存储容量，其单电极比电容最高达174mAh·g^-1，比单纯的H2SO4电解液的比电容高109mAh·g^-1。且有着良好的循环稳定性．根据实验现象及结果，探讨了Fe^3＋/Fe^2＋离子对在EC电极上的充放电机理，并提出了一种新的概念——氧化还原电解液电化学电容器。

英文摘要：

The electrochemical characteristics and pseudocapacitive effects of Fe^3＋/Fe^2＋ ion pair were investigated in an electrochemical capacitor （EC） system using porous carbon as electrode material and with H2SO4 solution containing Fe^3＋/Fe^2＋ ion pair as electrolyte. The cyclic voltammetric results indicated that highly reversible electrochemical redox reactions of Fe^3＋/Fe^2＋ ion pair occurred within the nano-pore structures of the porous carbon electrodes. Symmetrical charge/discharge cycles were achieved due to the existence of Fe^3＋/Fe^2＋ ion pair, which effectively improved the capacity of the electrochemical capacitor system. Apart from its excellent cyclic stability, the specific capacitance of the single electrode system reached 174 mAh·g^-1, which is 109 mAh·g^-1 higher than that obtained for H2SO4 as the electrolyte. The charge/discharge mechanism of Fe^3＋/Fe^2＋ ion pair in the EC systems was discussed and a new type of redox electrolyte electrochemical capacitor was suggested.