Poly(cyano-substituted diheteroareneethylene) as active electrode material for electrochemical supercapacitors

被引:67
作者
Fusalba, F [1 ]
Ho, HA [1 ]
Breau, L [1 ]
Bélanger, D [1 ]
机构
[1] Univ Quebec, Dept Chim, Lab Synth Organ Appl, Montreal, PQ H3C 3P8, Canada
关键词
D O I
10.1021/cm000011r
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A new class of low band gap thiophene polymers prepared from (E)-alpha-cyanoethylene thiophene derivatives were electrochemically and physically evaluated as active elect;rode material for electrochemical supercapacitors. The corresponding polymers were prepared by electrochemical polymerization of these monomers from a nonaqueous solution (acetonitrile) containing tetraethylammonium tetrafluoroborate. The electrochemical properties and the stability under cyclic voltammetry of the polymers were found to be strongly dependent on their electronic configuration, especially in the case where the monomer has two different aromatic heterocycles. The range of stable electroactivity of the polymers in organic media spans about 2 V. Since poor stability was observed by cyclic voltammetry for poly-(E)-alpha-[(2-thienyl)methylene]-2-(3-methylthiophene)acetonitrile and poly-(E)-alpha-(2-thienylmethylene)-2-furanacetonitrile, only poly-(E)-alpha-[(2-thienyl)methylene]-2-thiopheneacetonitrile, poly-(E)-alpha-[(3-methyl-2-thienyl)methylene]-2-thiopheneacetonitrile, and poly-(E)-alpha-[(2-furanyl)methylene]-2-thiopheneacetonitrile were evaluated as electrode materials for an electrochemical supercapacitor. Stability tests upon potential cycling between the n- and p-doped states and a potential range of about 2 V have shown a 60% decrease of the voltammetric charge for poly-(E)-alpha-[(2-thienyl)methylene]-2-thiophenacetonitrile following 2000 cycles. Preliminary galvanostatic charge-discharge cycling experiments for the best system indicated an energy density of 8.6 W h/kg while it delivered a power density of 1.6 kW/kg for a discharge time of 20 s.
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收藏
页码:2581 / 2589
页数:9
相关论文
共 41 条
  • [1] RECTIFYING INTERFACES USING 2-LAYER FILMS OF ELECTROCHEMICALLY POLYMERIZED VINYLPYRIDINE AND VINYLBIPYRIDINE COMPLEXES OF RUTHENIUM AND IRON ON ELECTRODES
    ABRUNA, HD
    DENISEVICH, P
    UMANA, M
    MEYER, TJ
    MURRAY, RW
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1981, 103 (01) : 1 - 5
  • [2] [Anonymous], CHEM MAT
  • [3] CHARACTERIZATION BY IMPEDANCE SPECTROSCOPY OF A POLYMER-BASED SUPERCAPACITOR
    ARBIZZANI, C
    MASTRAGOSTINO, M
    MENEGHELLO, L
    [J]. ELECTROCHIMICA ACTA, 1995, 40 (13-14) : 2223 - 2228
  • [4] Polymer-based redox supercapacitors: A comparative study
    Arbizzani, C
    Mastragostino, M
    Meneghello, L
    [J]. ELECTROCHIMICA ACTA, 1996, 41 (01) : 21 - 26
  • [5] Arbizzani C, 1996, ADV MATER, V8, P331, DOI 10.1002/adma.19960080409
  • [6] Arbizzani C., 1997, HDB ORGANIC CONDUCTI, V4, P595
  • [7] Difuryl polyenes as precursors of highly conducting electrogenerated conjugated polymers
    BenahmedGasmi, A
    Frere, P
    Roncali, J
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1996, 406 (1-2): : 231 - 234
  • [8] BERTHELOT JR, 1987, NEW J CHEM, V11, P487
  • [9] Spectroelectrochemical and electrical characterization of low bandgap polymers
    Beyer, R
    Kalaji, M
    Kingscote-Burton, G
    Murphy, PJ
    Pereira, VMSC
    Taylor, DM
    Williams, GO
    [J]. SYNTHETIC METALS, 1998, 92 (01) : 25 - 31
  • [10] EQCM STUDIES OF FILM GROWTH, REDOX CYCLING, AND CHARGE TRAPPING OF NORMAL-DOPED AND PARA-DOPED POLY(THIOPHENE)
    BORJAS, R
    BUTTRY, DA
    [J]. CHEMISTRY OF MATERIALS, 1991, 3 (05) : 872 - 878