双电层电容器活性炭电极的优化

通过物理方法对双电层电容器用活性炭电极进行改性实验，探讨了活性炭电极的结构（比表面积、孔径分布、孔容）和性能（比电容、充放电特性）的优化问题.改性后活性炭电极BET比表面积从1739.77 m²•g^-1增至2215.40 m²•g^-1，其中微孔比表面积增幅22％，中孔比表面积增幅35％，孔容积也有20%～30％的增幅量，孔径分布更为合理.优化的活性炭电极结构改善了电极材料的电化学特性，比电容量可达424 F•g^-1,增幅10％.

Activated carbon electrodes optimization

In the present study，the commercial activated carbon(AC) as electrode material used by electric double-layer capacitor(EDLC) were modified through physical method.The experiment was carried out in a vibration mill.The resultant activated carbon was characterized by BET surface area, pore size, pore volume and electrochemical performance.BET surface area increased from 1739.77 m²•g^-1 to 2215.40 m²•g^-1 after modification,micro-pore surface and mesopore increased 22% and 35% respectively and pore volume increased by 20%—30%.Both high pore volume and more rational pore distribution of active carbon contributed to better electrochemical characteristics.The modified activated carbon increased the specific capacitance of electrode by 10%, up to 424 F•g^-1.