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AC Impedance Studies on the Relationship between the Fractal Characteristics and Electrochemical Properties of Poly(Para‐Phenylene) Film
Author(s) -
Chen Wan,
Liang ChengHao,
Yie Yang,
Wu Bo
Publication year - 2008
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200800120
Subject(s) - electrolyte , dielectric spectroscopy , chemistry , x ray photoelectron spectroscopy , electrochemistry , passivation , scanning electron microscope , analytical chemistry (journal) , fractal dimension , phenylene , electrical impedance , fractal , chemical engineering , polymer , electrode , materials science , composite material , layer (electronics) , organic chemistry , mathematical analysis , mathematics , electrical engineering , engineering
The effects of experimental conditions on the fractal structure of electrosynthetic polyparaphenylene films were studied by electrochemical impedance spectroscopy. The results indicate that, at the potential range (0‐0.6 V), the film surface fractal dimension rises while the corresponding charge transfer resistances R ct decrease as charge increases. This is consistent with the oxidized behavior of the conducting polymer. As for the degradation of electrolytes, scanning electron microscopy observations of poly(para‐pheneylene) (PPP) film provide evidence of the close relationship between the degradation of electrolytes and the film morphology, also in good agreement with the electrochemical impedance results interpretation. The X‐ray photoelectron spectroscopic analysis results present that the relative oxygen content ratio (O/C) of the films increases with the times the electrolyte is used, which reveals that the degradation of the electrolyte may result in a compact and passivation PPP film.