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

Journal Article · Sat Jan 31 23:00:00 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), Journal Name: J. Electrochem. Soc.; (United States) Vol. 134:2; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

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