Patent ID: 8377546

Claim:
A secondary cell comprising: a positive electrode material comprising a mixture having a nitrogen-containing conductive polymer being polyindole, which is chemically modified by at least one electron-withdrawing group, wherein the at least one electron withdrawing group is covalently linked to corresponding aromatic group in the nitrogen-containing conductive polymer; and a conductive carbon material being mixed with the polymer and being 1% to 40% by weight of the mixture; wherein the mixture is activated by a 0.2 M to 5 M proton-containing acidic electrolytic solution; a negative electrode material comprising a mixture having a conductive polymer being polyaniline; and a conductive carbon material being mixed with the polymer and being 1% to 40% by weight of the mixture; wherein the mixture is activated by a 0.2 M to 5 M proton-containing acidic electrolytic solution; a separator separating the positive electrode and negative electrode materials; an electrolytic solution being disposed between the positive electrode and negative electrode materials and comprising organic acidic electrolytic solution; a positive electrode collecting member being connected to the positive electrode material; and a negative electrode collecting member being connected to the negative electrode material, whereby the secondary cell has a cyclic life of charging and discharging more than 10,000 cycles.