Electrochemical measurements in two-electrode system

In two-electrode system, the symmetrical supercapacitor was assembled using two electrodes with a glassy fiber paper as separator. The slurry of the mixture (carbon materials/acetylene black/PTFE) was pasted on the aluminum foil in electrochemical test using EMIMBF4 electrolyte. The electrochemical performance was evaluated by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements using an EC-LAB VMP3 potentiostat (BioLogic Science Instruments).

在两电极体系中，以玻璃纤维纸作为隔膜，采用两片电极组装得到对称型超级电容器。将由碳材料、乙炔黑与聚四氟乙烯（PTFE）混合制备的浆料涂覆于铝箔之上，电化学测试采用1-乙基-3-甲基咪唑四氟硼酸盐（EMIMBF4）作为电解液。该超级电容器的电化学性能通过循环伏安法（CV）、恒流充放电（GCD）与电化学阻抗谱（EIS）进行表征，测试所用设备为EC-LAB VMP3型恒电位仪（BioLogic科学仪器公司）。