I had coated activated carbon with poly(aniline-co-nitroaniline) in a ratio of 1:0.5:1, 1:1:1 and 1:2:1 (C:PAni:nitro-Ani) than did the reduction process via Fe to convert NO2 groups to NH2 groups in order to make material ion-exchangeable and to achieve a good electroproperty at the same time. Ion exchange capacity did improve but the capacitance get a decline in comparison to pristine activated carbon itself.