Abstract
Aqueous poly(3,4-ethylenedioxythiophene methanol)-poly(styrene sulfonate) dispersion (PEDTM-PSS) was prepared by chemical oxidation synthesis. As-formed PEDTM-PSS film was characterized by Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis, and scanning electron microscopy techniques. The results of Raman and FT-IR confirmed the formation of PEDTM-PSS. The electrochemical capacitance properties of PEDTM-PSS were firstly investigated in this paper by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscope techniques. PEDTM-PSS electrode showed a specific capacitance of 62.3 F g−1 at a current density of 0.5 A g−1 in 0.1 M LiClO4/ACN solution, which was higher than the value of poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT-PSS) (50.5 F g−1). Furthermore, the energy density of assembled symmetric supercapacitor based on PEDTM-PSS was 2.4 Wh kg−1 at a power density of 325 W kg−1, which was also higher than that of PEDOT-PSS (1.6 Wh kg−1). Most importantly, the symmetric supercapacitor exhibited extraordinary stability up to 1000 cycles with a specific capacitance retention of 105 %. These results indicated that the PEDTM-PSS was a promising electrode material for the supercapacitors application.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (grant numbers: 51203070, 51303073, 51463008), Jiangxi Provincial Department of Education for postgraduate (YC2014-S435), Ganpo Outstanding Talents 555 projects (2013), the Training Plan for the Main Subject of Academic Leaders of Jiangxi Province (2011), and the Natural Science Foundation of Jiangxi Province (grant numbers: 20142BAB206028 and 20142BAB216029).
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Xiumei Ma and Weiqiang Zhou contributed equally to this work.
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Ma, X., Zhou, W., Wang, Z. et al. Preparation of aqueous poly(3,4-ethylenedioxythiophene methanol)-poly(styrene sulfonate) dispersion and its capacitance performance as symmetric supercapacitors. J Solid State Electrochem 19, 3329–3338 (2015). https://doi.org/10.1007/s10008-015-2939-z
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DOI: https://doi.org/10.1007/s10008-015-2939-z