离子液体在多孔碳电极上的电化学性能

制备了数种离子液体及离子液体有机溶液电解质,用线性电位扫描法测试了它们的电化学窗口;并通过循环伏安、交流阻抗、电势阶跃等电化学方法,对它们在多孔碳电极中的电化学性能进行了研究.实验结果表明:溶剂对1-乙基-3-甲基咪唑类离子液体有机溶液电解质的电化学窗口有较大的影响.离子液体及离子液体有机溶液电解质在多孔碳电极上的电化学性能与其电导率密切相关,电导率越大,充电时间常数越小,比容量越大;但比容量降低的倍率远小于电导率降低的倍率.

Electrochemical Properties of Ionic Liquid on Porous Carbon Electrode

Several kinds of ionic liquid electrolytes were prepared, and their stable potential windows were tested by linear potential sweep. Cyclic voltammetry, electrochemical impedance spectrometry and potential step were used to test the electrochemical performance of these ionic liquid electrolytes on porous carbon electrode. The result shows that solvent has strong influence on the stable potential windows of organic solution electrolytes of 1-ethyl-3-methyl-imimidazolium ionic liquids. On porous carbon electrode, the electro-chemical characters of ionic liquid and ionic liquid organic solution electrolytes are intimately related with their conductivities. A higher capability and lower recharged constant in higher conductivity electrolyte on the electrode are found, however, the decreased ratio of capability is far lower than the decreased ratio of conductivity.