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Ultrahigh‐Conductivity Polymer Hydrogels with Arbitrary Structures
Author(s) -
Yao Bowen,
Wang Haiyan,
Zhou Qinqin,
Wu Mingmao,
Zhang Miao,
Li Chun,
Shi Gaoquan
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201700974
Subject(s) - materials science , pedot:pss , supercapacitor , sulfuric acid , capacitance , conductivity , conductive polymer , self healing hydrogels , fiber , suspension (topology) , polymer , electrical conductor , chemical engineering , composite material , porosity , electrode , polymer chemistry , chemistry , mathematics , homotopy , pure mathematics , engineering , metallurgy
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.