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Title: Effect of polymerization anion on electrochemical properties of polypyrrole and on Li/LiClO/sub 4//polypyrrole battery performance

Abstract

Electrochemical doping-undoping kinetics of electropolymerized polypyrrole (PPy) and the charge-discharge characteristics of Li/LiClO/sub 4//PPy battery were found to show an interesting dependency on the kind of anions used for the preparation of PPy film. The relationship between the doping charge (anodization charge estimated from cyclic voltammogram) of PPy film and the polymerization potential revealed that the optimum potential for getting the largest doping capacity depends strongly on the kind of anions. The optimum potential for PF/sub 6//sup -/ - and CF/sub 3/SO/sub 3/ -formed PPy films was 0.32V vs/ Ag/Ag/sup +/. On the other hand, ClO/sub 4//sup -/ -formed PPy film had the largest doping charge at 0.84V preparation over an examined potential range (0.30-0.84V). An appropriate polymerization scheme was discussed on the assumption that the presence of electron donating species (electrolyte anions) may stabilize a radical cation intermediate, by which the follow-up reaction to yield a polymeric film is favored. The postulated polymerization scheme is supported by the results of cross-sectional SEM micrographs of various anion formed PPy films. The charge-discharge characteristics of Li/LiClO/sub 4//PPy (formed at the optimal potential) batteries were also investigated, in an attempt to clarify the relationship between battery performance and basic electrochemical behavior ofmore » the PPY electrode. From observing the charge-discharge behavior at various depths of charge and the current densities, the PF/sub 6//sup -/ -formed PPy was confirmed to be superior as a cathode material to the PPy films formed with other anions, viz., ClO/sub 4//sup -/, and CF/sub 3/SO/sub 3//sup -/.« less

Authors:
; ;
Publication Date:
Research Org.:
Dept. of Applied Chemistry, School of Science and Engineering, Waseda Univ., 3-4-1 Okubo, Shinjuku-ku, Tokyo (JP)
OSTI Identifier:
6750989
Resource Type:
Journal Article
Journal Name:
J. Electrochem. Soc.; (United States)
Additional Journal Information:
Journal Volume: 135:5
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; LITHIUM-CHLORINE BATTERIES; PERFORMANCE TESTING; ANIONS; ANODES; BORON FLUORIDES; CATHODES; CHLORINE OXIDES; CURRENT DENSITY; DOPED MATERIALS; ELECTROCHEMISTRY; OPTIMIZATION; POLYMERIZATION; SCANNING ELECTRON MICROSCOPY; BORON COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CHEMICAL REACTIONS; CHEMISTRY; CHLORINE COMPOUNDS; ELECTRIC BATTERIES; ELECTROCHEMICAL CELLS; ELECTRODES; ELECTRON MICROSCOPY; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; IONS; MATERIALS; METAL-GAS BATTERIES; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; TESTING; 250902* - Energy Storage- Batteries- Performance & Testing; 400400 - Electrochemistry

Citation Formats

Osaka, T, Naoi, K, and Ogano, S. Effect of polymerization anion on electrochemical properties of polypyrrole and on Li/LiClO/sub 4//polypyrrole battery performance. United States: N. p., 1988. Web. doi:10.1149/1.2095877.
Osaka, T, Naoi, K, & Ogano, S. Effect of polymerization anion on electrochemical properties of polypyrrole and on Li/LiClO/sub 4//polypyrrole battery performance. United States. doi:10.1149/1.2095877.
Osaka, T, Naoi, K, and Ogano, S. Sun . "Effect of polymerization anion on electrochemical properties of polypyrrole and on Li/LiClO/sub 4//polypyrrole battery performance". United States. doi:10.1149/1.2095877.
@article{osti_6750989,
title = {Effect of polymerization anion on electrochemical properties of polypyrrole and on Li/LiClO/sub 4//polypyrrole battery performance},
author = {Osaka, T and Naoi, K and Ogano, S},
abstractNote = {Electrochemical doping-undoping kinetics of electropolymerized polypyrrole (PPy) and the charge-discharge characteristics of Li/LiClO/sub 4//PPy battery were found to show an interesting dependency on the kind of anions used for the preparation of PPy film. The relationship between the doping charge (anodization charge estimated from cyclic voltammogram) of PPy film and the polymerization potential revealed that the optimum potential for getting the largest doping capacity depends strongly on the kind of anions. The optimum potential for PF/sub 6//sup -/ - and CF/sub 3/SO/sub 3/ -formed PPy films was 0.32V vs/ Ag/Ag/sup +/. On the other hand, ClO/sub 4//sup -/ -formed PPy film had the largest doping charge at 0.84V preparation over an examined potential range (0.30-0.84V). An appropriate polymerization scheme was discussed on the assumption that the presence of electron donating species (electrolyte anions) may stabilize a radical cation intermediate, by which the follow-up reaction to yield a polymeric film is favored. The postulated polymerization scheme is supported by the results of cross-sectional SEM micrographs of various anion formed PPy films. The charge-discharge characteristics of Li/LiClO/sub 4//PPy (formed at the optimal potential) batteries were also investigated, in an attempt to clarify the relationship between battery performance and basic electrochemical behavior of the PPY electrode. From observing the charge-discharge behavior at various depths of charge and the current densities, the PF/sub 6//sup -/ -formed PPy was confirmed to be superior as a cathode material to the PPy films formed with other anions, viz., ClO/sub 4//sup -/, and CF/sub 3/SO/sub 3//sup -/.},
doi = {10.1149/1.2095877},
journal = {J. Electrochem. Soc.; (United States)},
number = ,
volume = 135:5,
place = {United States},
year = {1988},
month = {5}
}