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Conducting hydrogels, consisting of conductive polymer poly(3,4- ethylene dioxythiophene)/poly(styrene-sulfonate) (PEDOT/PSS) entangled in the polyacrylamide (PAAm) network, were synthesized by UV using potassium periodate as photo-sensitizer initiator. Electrochemical properties of conducting hydrogels were evaluated by cyclic voltammetry measurements at room temperature. Electrochemical tests indicated the rectangular shape of voltammograms. In addition, the charge/discharge time obtained was very short. Both are characteristic of capacitive materials. Additionally, the conducting hydrogels presented practically the same electrochemical behavior and coulombic efficiency (η) of around 100% after 1,000 charge/discharge cycles. This shows that from the electrochemical perspective, the redox processes involved are reversible, even after several charge/discharge cycles, which is indicative of a material with excellent electrochemical properties.

The synthesis and capacitive properties of poly(3,4- ethylene dioxythiophene)/poly(styrene-sulfonate) and poly (acrylamide) conducting hydrogels