Effect of PF/sub 6//sup -/ anion on the properties of lithium-polypyrrole battery during polypyrrole film formation

Journal Article · Sun Feb 01 00:00:00 EST 1987 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2100447· OSTI ID:6875704

Osaka, T; Naoi, K; Sakai, H; Ogano, S

A high charging-discharging efficiency was obtained for Li/LiClO/sub 4/-PC (propylene carbonate)/PPy (polypyrrole) battery, when a PPy film formed in LiPF/sub 6//PC by electropolymerization was used in a LiClO/sub 4/ electrolyte after PF/sub 6/- anion undoping. The anion doping-undoping process for the PPy film electrodes was examined with the usual electrochemical techniques. A Li/LiClO/sub 4//PPy cell was also tested with a constant current charging-discharging performance. The relationship between sweep rate and anodic peak current shown in the cyclic voltammograms obtained for the PPy film formed in the LiClO/sub 4/ electrolyte indicates a typical diffusion-controlled process, while a reaction-controlled process was found to be involved in the PPy film electrode formed in the LiPF/sub 6/ electrolyte. The relationship between undoping level and elapsed time indicated that the diffusion rate of the ClO/sub 4/-doped in the PPy film formed in LiPF/sub 6/ has a higher value than that of the ClO/sub 4/-doped in the PPy film formed in LiClO/sub 4/. SEM observations showed that the PPy films formed in LiPF/sub 6/ were rougher than those formed in LiClO/sub 4/. Infrared (IR) spectral measurements confirmed that there are no essential differences in the manner of bonding of the PPy films formed in LiPF/sub 6/(PPy/sup +/PF/sub 6//sup -/) and LiClO/sub 4/(PPy/sup +/ClO/sub 4/-). Consequently, a morphology of the PPy films was suggested to be a very important factor in determining the kinetics of the anion doping-undoping process and, therefore, charging-discharging properties of Li/LiClO/sub 4/-PC/PPy battery.

• Research Organization: Dept. of Applied Chemistry, School of Science and Engineering, Waseda Univ., Okubo, Shinjuku-ku, Tokyo 160
• OSTI ID: 6875704
• Journal Information: J. Electrochem. Soc.; (United States), Vol. 134:2
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
METAL-NONMETAL BATTERIES
ELECTRODES
ELECTROLYTES
FABRICATION
PHOSPHORUS FLUORIDES
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
PROPYLENE
PYRROLES
ANIONS
CARBONATES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHLORINE OXIDES
COMPARATIVE EVALUATIONS
CRYSTAL GROWTH
DOPED MATERIALS
ELECTRIC CHARGES
ELECTRIC DISCHARGES
INFRARED SPECTRA
LITHIUM
LITHIUM COMPLEXES
MORPHOLOGY
POLYMERS
THIN FILMS
ALKALI METALS
ALKENES
AZOLES
CARBON COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CHEMISTRY
CHLORINE COMPOUNDS
COMPLEXES
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELEMENTS
FILMS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
IONS
KINETICS
MATERIALS
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
REACTION KINETICS
SPECTRA
SYNTHESIS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries