Ultrahigh‐Conductivity Polymer Hydrogels with Arbitrary Structures |
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Authors: | Bowen Yao Haiyan Wang Qinqin Zhou Mingmao Wu Miao Zhang Chun Li Gaoquan Shi |
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Affiliation: | Department of Chemistry, Tsinghua University, Beijing, P. R. China |
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Abstract: | A poly(3,4‐ethylenedioxythiophene):poly(4‐styrenesulfonate) (PEDOT:PSS) hydrogel is prepared by thermal treatment of a commercial PEDOT:PSS (PH1000) suspension in 0.1 mol L?1 sulfuric acid followed by partially removing its PSS component with concentrated sulfuric acid. This hydrogel has a low solid content of 4% (by weight) and an extremely high conductivity of 880 S m?1. It can be fabricated into different shapes such as films, fibers, and columns with arbitrary sizes for practical applications. A highly conductive and mechanically strong porous fiber is prepared by drying PEDOT:PSS hydrogel fiber to fabricate a current‐collector‐free solid‐state flexible supercapacitor. This fiber supercapacitor delivers a volumetric capacitance as high as 202 F cm?3 at 0.54 A cm?3 with an extraordinary high‐rate performance. It also shows excellent electrochemical stability and high flexibility, promising for the application as wearable energy‐storage devices. |
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Keywords: | conductive hydrogels conducting polymers fiber supercapacitors poly(3 4‐ethylenedioxythiophene):poly(4‐styrenesulfonate) |
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