Disulfide‐polyaniline composite cathodes for rechargeable batteries with high energy density

A composite cathode was prepared from a solution containing 2,5‐dimercapto‐1,3,4‐thiadiazole (DMcT) and polyaniline (PAn). The resulting cathode exhibits 80% of the theoretical capacity. Furthermore, an energy density of over 600 Wh/kg‐cathode and a discharge voltage of 3.4 V are obtained, when it is coupled with a lithium anode. Additional advantages of the present cathode material over the conventional metal oxides are the ease in disposal by incineration, the low pollution and the low cost. Current capability of 137 A/kg‐cathode is achieved by adding a polypyrrole derivative to the DMcT‐PAn composite and coupling it with a copper current collector.