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Polypyrrole: Synthesis and electronic device application
Author(s) -
Satoh Masaharu,
Hasegawa Etsuo
Publication year - 1996
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19961050130
Subject(s) - polypyrrole , materials science , polymerization , capacitor , capacitance , dielectric , electrode , dissolution , electrolyte , electrochemistry , electrolytic capacitor , polymer capacitor , chemical engineering , optoelectronics , composite material , polymer , chemistry , electrical engineering , voltage , engineering
A Ta solid electrolytic capacitor using conducting polypyrrole as a counter electrode has been developed by means of the direct film formation of electrochemical and chemical polymerization methods. Two‐step electrochemical polymerization at a rapid and gentle rate yields a polypyrrole film on the dielectric surface of the capacitor. On the other hand, the homogeneous mixture dissolving pyrrole and oxidant under −70 °C allows chemical polymerization at elevated temperature, which also produces polypyrrole film on the dielectric surface. The capacitors produced by these methods demonstrate the improved characteristics, i.e., a high capacitance, low inner resistance and small leakage current, that correspond to the high‐speed electronic devices.