Dependence of film thickness on electrochemical kinetics of polypyrrole and on properties of lithium/polypyrrole battery
The charging-discharging behavior of lithium/LiClO/sub 4//polypyrrole battery was found to show a different dependence on the thickness of a polypyrrole film cathode prepared at various polymerization potentials. Lithium batteries constructed with a polypyrrole cathode formed at a higher potential show better charging-discharging performance characteristics than those with a film prepared at a lower potential. The electrode kinetics of electrochemically prepared polypyrrole were investigated in an attempt to clarify the interesting dependence of the behavior of Li/polypyrrole battery on the thickness of polypyrrole cathode as a function of formation potential. A potential step chronoamperometry, together with an ac impedance measurement, has evidenced that there is a strong relationship between the doping charges and the apparent diffusion coefficients of polypyrrole electrodes. In practice, the battery performance of Li/LiClO/sub 4//polypyrrole cells was examined by varying the current density. The upper limit of the current density at which the coulombic yield in the charging-discharging curves remains at 100% was found for both thin and thick films of 1 and 5 C cm/sup -2/ film formation charges.
- Research Organization:
- Dept. of Applied Chemistry, Waseda Univ., 3-4-1, Okubo, Shinjuku-ku, Tokyo 160
- OSTI ID:
- 5687774
- Journal Information:
- J. Electrochem. Soc.; (United States), Vol. 134:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
METAL-NONMETAL BATTERIES
CATHODES
ELECTROCHEMISTRY
PYRROLES
CHEMICAL REACTION KINETICS
COULOMB FIELD
CURRENT DENSITY
DIFFUSION
ELECTRIC IMPEDANCE
FILMS
LITHIUM
LITHIUM CHLORIDES
POLYMERIZATION
POLYMERS
ALKALI METAL COMPOUNDS
ALKALI METALS
AZOLES
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
ELECTRIC BATTERIES
ELECTRIC FIELDS
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
IMPEDANCE
KINETICS
LITHIUM COMPOUNDS
LITHIUM HALIDES
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
REACTION KINETICS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries
400400 - Electrochemistry