Anodic deprotonation of polyaniline films in alcohol solutions

Journal Article · Sat May 01 00:00:00 EDT 1993 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00029a005· OSTI ID:6250020

Susumu Kuwabata, Nobuo Kihira ^[1]; Yoneyama, Hiroshi

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1. Osaka Univ. (Japan)

Polyaniline films prepared by electrochemical oxidation of aniline possess high redox activities both in aqueous acidic and in nonaqueous solutions. The high durability of the film against the redox cycling opens applications of this material to electrochromic and electronic devices and cathode-active materials of rechargeable lithium batteries. Polyaniline films immersed in alcohol solutions such as methanol, ethanol, 1-propanol, and 2-propanol are deprotonated by applying anodic potentials. The potential at which the deprotonation reaction is induced to occur is the most negative at methanol among the above four kinds of alcohols used, and ethanol, 1-propanol, and 2-propanol follow in this order. This finding is quantitatively discussed in terms of the difference of the affinity of the solvent for the protonated polyaniline. An equation to predict the potential at which the conductance of polyaniline is decreased to one-half of the highest conductance by the deprotonation is derived, and the validity of the equation is verified for results obtained both in aqueous solutions of different pH values and in the above alcohol solutions. 26 refs., 9 figs.

• OSTI ID: 6250020
• Journal Information: Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 5:5; ISSN CMATEX; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903 -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ALCOHOLS
AMINES
ANILINE
AQUEOUS SOLUTIONS
AROMATICS
CHEMICAL REACTIONS
DISPERSIONS
ETHANOL
FILMS
HYDROXY COMPOUNDS
MATHEMATICAL MODELS
METHANOL
MIXTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
PH VALUE
POLYMERS
POTENTIALS
PROPANOLS
SOLUTIONS
SOLVENTS