The kinetics and cyclability of various types of polyacetylene electrodes in nonaqueous lithium cells

Journal Article · Sat Dec 01 04:00:00 EST 1984 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2115403· OSTI ID:5728690

Padula, A; Pedretti, U; Schwartz, M; Scrosati, B

The electrochemical doping process of polyacetylene has been investigated in lithium cells using lithium perchlorate in propylene carbonate as the electrolytic solution. The kinetics and the cyclability of this process have been examined by cyclic voltammetry, charge-discharge curves, and EPR analysis. The results show that, for film-type polyacetylene electrodes, the kinetics are controlled by the diffusion of the dopant species throughout the polymer. This diffusion appears particularly slow from the bulk to the surface of the polymer so that constant-current chargedischarge cycles of polyacetylene film electrodes may sustain only low rates (i.e., in the range o microamperes per square centimeter), and have a poor coulombic efficiency (i.e., of the order of 50%). Much better performance is offered by foam-type polyacetylene electrodes, where the intrinsic high porosity produces an improved surface morphology, which in turn favors the diffusion of the dopant species. Indeed, constant-current, charge-discharge cycles at reasonably high rates (i.e., in the range of milliamperes per square centimeter) and reasonably good coulombic efficiencies (i.e., of the order of 85%), have been obtained with lithium cells using this type of polyacetylene electrodes.

• Research Organization: Dipartimento di Chimica, University of Rome, Rome
• OSTI ID: 5728690
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 131:12; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ACETYLENE
ALKENES
ALKYNES
ANODES
CARBON COMPOUNDS
CARBONATES
CATHODES
CHEMICAL REACTION KINETICS
COULOMB FIELD
CRYSTAL DOPING
ELECTRIC BATTERIES
ELECTRIC FIELDS
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
ELECTRON SPIN RESONANCE
HYDROCARBONS
KINETICS
LITHIUM-CHLORINE BATTERIES
MAGNETIC RESONANCE
METAL-GAS BATTERIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PERFORMANCE
POLYMERS
PROPYLENE
REACTION KINETICS
RESONANCE
SURFACE PROPERTIES
VOLTAMETRY