3D flowerlike poly(3,4-ethylenedioxythiophene) for high electrochemical capacitive energy storage

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• 作者：Xiaoxia Bai ; Xiujie Hu ; Shuyun Zhou ; Jun Yan ; Chenghua Sun ; Ping Chen ; Laifeng Li
• 关键词：3D ; Flowerlike ; Poly(3 ; 4-ethylenedioxythiophene) ; Energy storage
• 刊名：Electrochimica Acta
• 出版年：2013
• 出版时间：1 September, 2013
• 年：2013
• 卷：106
• 期：Complete
• 页码：219-225
• 全文大小：1994 K

文摘

The electrochemical performances of 3D flowerlike PEDOT are characterized by cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. It shows high specific capacitance of 111 F g^?1, which is greatly higher than that of 1D PEDOT nanofibers we reported before. In addition, on the basis of this PEDOT matrix, 3D flowerlike PEDOT/MnO₂ composite is synthesized by a two-step approach as a high-property supercapacitor electrode material. Scanning and transmission electron microscopy show that 3D PEDOT matrix is kept well and decorated well by MnO₂ nanoparticles (2-5 nm). And the capacitive performances are tested as well. The specific capacitance of this composite can highly reach around 183 F g^?1, and retain more than 90 % of the original value after 1000 consecutive charge/discharge cycles. These results indicate that the 3D flowerlike PEDOT/MnO₂ composite possesses a synergy effect of complementary properties of both components, which results in higher specific capacitance and better stability.