先后采用等离子体和丙烯酸(AA)蒸汽处理碳纤维织物(CF)得到表面含有活性基团的活性碳纤维织物(ACF),分别将聚吡咯(PPy)聚合沉积在CF和ACF表面上制备了复合电极,采用扫描电子显微镜(SEM)、傅里叶变换红外光谱仪(FT-IR)、X射线光电子能谱仪(XPS)、紫外分光光度仪(UV)以及电化学工作站对复合电极的表面形貌、PPy分子构象以及所组成的超级电容器的电化学性能进行测试研究。结果表明:沉积在ACF表面上的PPy具有更为松散的形貌和更为优异的导电性,PPy与ACF之间结合力更强,由ACF/PPy为电极组成的超级电容器的电化学性能得到明显改善。有望为制备PPy复合电极提供新的思路和方向。
Carbon fiber fabric (CF) was treated with plasma and acrylic acid (AA) steam to obtain activated carbon fiber fabric (ACF) with active groups on the surface.Polypyrrole (PPy) was polymerized and deposited on the surface of CF and ACF respectively to prepare composite electrodes.Scanning electron microscopy (SEM),fourier transform infrared spectroscopy (FT-IR),X-ray photoelectron spectroscopy (XPS),ultraviolet spectrophotometer (UV) and electrochemical workstation were used to study the surface morphology,PPy molecular conformation and electrochemical performance of the composite electrode.The results shown that the PPy deposited on the ACF surface had more loose morphology and better conductivity,and the binding force between PPy and ACF was stronger.The electrochemical performance of the supercapacitor composed of ACF/PPy electrode was obviously improved.To provide new idea and direction for the preparation of PPy composite electrode was expected.
[1] Burke A.Ultracapacitors:why,how,and where is the technology[J].Journal of Power Sources,2000,91(1):37-50.
[2] Miller J R,Simon P.Electrochemical capacitors for energy management[J].Science,2008,321(5889):651-652.
[3] Winter M,Brodd R J.What are batteries,fuel cells,and supercapacitors?[J].Chemical Reviews,2004,104(10):4245-4270.
[4] Zhang Q W,Zhou X,Yang H S.Capacitance properties of composite electrodes prepared by electrochemical polymerization of pyrrole on carbon foam in aqueous solution[J].Journal of Power Sources,2004,125(1):141-147.
[5] Kang H C,Geckeler K.Enhanced electrical conductivity of polypyrrole prepared by chemical oxidative polymerization:effect of the preparation technique and polymer additive[J].Polymer,2000,41(18):6931-6934.
[6] Muthulakshmi B,Kalpana D,Pitchumani S,et al.Electrochemical deposition of polypyrrole for symmetric supercapacitors[J].Journal of Power Sources,2006,158(2):1533-1537.
[7] Jurewicz K,Delpeux S,Bertagna V,et al.Supercapacitors from nanotubes/polypyrrole composites[J].Chemical Physics Letters,2001,347(1-3):36-40.
[8] Xiao Q,Zhou X.The study of multiwalled carbon nanotube deposited with conducting polymer for supercapacitor[J].Electrochimica Acta,2003,48(5):575-580.
[9] Khomenko V,Frackowiak E,Beguin F.Determination of the specific capacitance of conducting polymer/nanotubes composite electrodes using different cell configurations[J].Electrochimica Acta,2005,50(12):2499-2506.
[10] An K H,Jeon K K,Heo J K,et al.High-capacitance supercapacitor using a nanocomposite electrode of single-walled carbon nanotube and polypyrrole[J].Journal of the Electrochemical Society,2002,149(8):A1058-A1062.
[11] Li C,Sun C,Chen W,et al.Electrochemical thin film deposition of polypyrrole on different substrates[J].Surface and Coatings Technology,2005,198(1-3):474-477.
[12] Kim J H,Lee Y S,Sharma A K,et al.Polypyrrole/carbon composite electrode for high-power electrochemical capacitors[J].Electrochimica Acta,2006,52(4):1727-1732.
[13] Devreux F,Bidan G,Syed A,et al.Solid state 13CNMR in conducting polymers[J].Journal de Physique,1985,46(9):1595-1601.
[14] Forsyth M,Truong V T,Smith M E.Structural characterization of conducting polypyrrole using 13C cross-polarization/magic-angle spinning solid-state nuclear magnetic resonance spectroscopy[J].Polymer,1994,35(8):1593-1601.
[15] Duchet J,Legras R,Demoustier C S.Chemical synthesis of polypyrrole:structure-properties relationship[J].Synthetic Metals,1998,98(2):113-122.
[16] Carrasco P M,Grande H J,Cortazar M,et al.Structure-conductivity relationships in chemical polypyrroles of low,medium and high conductivity[J].Synthetic Metals,2006,156(5-6):420-425.
基金资助
安徽工程大学科研启动基金资助项目(2020YQQ023和2020YQQ024);安徽工程大学校级科研项目(Xjky2020042和Xjky2020044);安徽省纺织结构复合材料国际联合研究中心开放基金(2021ACTC08);安徽工程大学本科生科研项目(2021ffky02和2021ffky03)