Method of evaluating the ionic conductance of polypyrrole films and improvement of ionic conductance of polyethylene oxide-incorporated polypyrrole composite

Abstract In this study, stainless steel electrode alternate current (ac) impedance associated with direct current (dc) polarization measurements were proposed to successfully evaluate the contribution of ionic conductance ( t ion ) to the bulk conductance of polypyrrole (PPy) in various relative humidities (RH). The fraction of t ion , defined as the ratio of (1/ R i ) to ((1/ R i )+(1/ R e )), was used as a quantitative index for the contribution of ionic conductance. The results showed that the t ion are 0.15, 0.29, and 0.46 for PPy in 5, 25, and 50% RH, respectively. Also, the t ion can increase from 0.12 to 0.22 in dry nitrogen after PPy was modified with polyethylene oxide (PEO).

[1]  L. Toppare,et al.  Conducting polymer composites: Polypyrrole and poly(vinyl chloride‐vinyl acetate) copolymer , 1997 .

[2]  B. Scrosati,et al.  Polypyrrole‐dodecylsulfate: 2 × 104 cycles with an organic electrochromic material in a Basic Medium , 1990 .

[3]  J. L. Acosta,et al.  Structural, morphological and electrical characterization of polymer electrolytes based on PEO/PPO blends , 1996 .

[4]  Masayuki Morita,et al.  Layered Polyaniline Composites with Cation‐Exchanging Properties for Positive Electrodes of Rechargeable Lithium Batteries , 1995 .

[5]  B. Hwang,et al.  Interaction of copper(I)-polypyrrole complexes prepared by depositing–dissolving copper onto and from polypyrroles , 1999 .

[6]  J. Przyłuski.  Increasing the conductivity of polymer solid electrolytes: A review , 1989 .

[7]  S. Chandra,et al.  Investigations on poly ethylene oxide based polymer electrolyte complexed with AgNO3 , 1993 .

[8]  W. R. Salaneck,et al.  XPS and electrical characterization of BF4−-doped polypyrrole exposed to oxygen and water , 1985 .

[9]  M. de Pinto,et al.  Polymers and copolymers of pyrrole and thiophene as electrodes in lithium cells , 1997 .

[10]  N. Ogata,et al.  Estimation of Li+ transport number in polymer electrolytes by the combination of complex impedance and potentiostatic polarization measurements , 1988 .

[11]  L. Samuelson,et al.  Kinetics of the degradation of electrical conductivity in polypyrrole , 1986 .

[12]  Bing-Joe Hwang,et al.  Mechanism of conductivity decay of polypyrrole exposed to water and enhancement of conductivity stability of copper(I)-modified polypyrrole , 2001 .

[13]  B. Hwang,et al.  Enhancement of conductivity stability of polypyrrole films modified by valence copper and polyethylene oxide in an oxygen atmosphere , 2000 .

[14]  Jacques Devaux,et al.  Temperature dependence of the conductivity in conducting polymer composites , 1994 .

[15]  Bruno Scrosati,et al.  Applications of electroactive polymers , 1993 .

[16]  Å. Wendsjö,et al.  Infra-red and X-ray diffraction study of the hydration process in the polymer electrolyte system M(CF3SO3)2PEOn for M=Pb, Zn and Ni , 1993 .

[17]  L. Nazar,et al.  Poly(pyrrole) and poly(thiophene)/vanadium oxide interleaved nanocomposites: positive electrodes for lithium batteries , 1998 .

[18]  T. Osaka,et al.  Ambient‐Temperature, Rechargeable, All‐Solid Lithium/Polypyrrole Polymer Battery , 1995 .

[19]  Ingemar Lundström,et al.  Proton modification of conducting polypyrrole , 1984 .

[20]  Effect of doping anions in polypyrrole gas sensors , 1993 .

[21]  B. Saunders,et al.  Physical properties of polypyrrole films containing trisoxalatometallate anions and prepared from aqueous solution , 1997 .

[22]  N. Ogata,et al.  Ionic transport number of network PEO electrolytes , 1990 .

[23]  S. Kuwabata,et al.  Charge‐discharge Characteristics of Polypyrrole Films Containing Incorporated Anthraquinone‐1‐Sulfonate , 1992 .

[24]  M. J. Reddy,et al.  Study of a thin film electrochemical cell based on (PVP + AgNO3) electrolyte , 1995 .

[25]  B. Hwang,et al.  Conductivity and stability of polypyrrole film electrosynthesized on a PbO2/SnO2/Ti substrate , 1995 .

[26]  T. Osaka,et al.  Application of Solid Polymer Electrolyte to Lithium/Polypyrrole Secondary Battery System , 1994 .

[27]  H. Allcock,et al.  Complex formation and ionic conductivity of polyphosphazene solid electrolytes , 1986 .

[28]  R. Turcu,et al.  Stability study of conducting polypyrrole films and polyvinylchloride-polypyrrole composites doped with different counterions , 1997 .

[29]  P. Bruce,et al.  Electrochemical measurement of transference numbers in polymer electrolytes , 1987 .