Abstract: Cu-activated carbon composite electrodes were prepared by the impregnation method and the mixing method. The
porous structures and electrochemical double-layer capacitance of activated carbons loaded with metal Cu were investigated by using nitrogen gas adsorption and
constant current cycling (CCC) methods. The results show that activated carbon loaded with metal Cu can improve the discharge capacitance of the electrodes,
however, the different loading methods will lead to the varied influences on the cycle characterization of the electrodes. SEM, TEM and XRD technologies
show that the stable electrochemical characterization obtained from the activated carbon mixed metal Cu electrode mainly depends on the metal particles
dispersed homogeneously in all parts of the activated carbon.

Key words: electric double-layer capacitors, load, discharge capacitance