Novel conductive, redox polymer for battery and other applications. Final report on phase 2. Report for April 1988-September 1990
The objectives of the project were to develop an improved synthesis which gives only the 3-substituted pyrrole and to evaluate the polymers made from these compounds for application in battery electrodes, electrochromics, and electrocatalytic surfaces. The substituents impart to the conductive polymer backbone properties of higher charge density, chemical specificity, or redox characteristics for sensing or catalysis. A general synthesis was developed for making the pyrole monomers with the redox moiety attached directly at the 3-position. 3-Dimethyloxyphenylpyrrole and 3-ferrocenylpyrrole, compounds which had not been previously synthesized, were made in good yields. Polypyrrole films made with hydroquinonyl substituents had up to eight times the charge stored in aqueous electrolytes compared with unsubstituted pyrrole, giving them an equivalent weight of 85 g/eq. The high charge storage capacity of the polymer film makes it a candidate for the counter electrode in a transparent all polymeric electrochromic device. The system, however, did not operate in aprotic electrolytes, eliminating its consideration for high energy density Li batteries. The ferrocenylpyrrole monomer had one of the lowest oxidation potentials reported for a ferrocene derivative due to the conjugation with the pyrrole. There was little evidence, however, that either homopolymers or copolymers with pyrrole were formed by electropolymerization of the monomer.
- Research Organization:
- EIC Labs., Inc., Norwood, MA (United States)
- OSTI ID:
- 6108544
- Report Number(s):
- PB-93-217016/XAB; CNN: NSF-ISI-8620332
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
POLYMERS
RESEARCH PROGRAMS
CAPACITY
CATALYSIS
CHARGE DENSITY
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COPOLYMERS
ELECTRIC BATTERIES
ELECTROCATALYSTS
ELECTROCHEMISTRY
ELECTROCHROMISM
ELECTRODES
ELECTROLYTES
ENERGY DENSITY
FERROCENE
MONOMERS
OXIDATION
POLYMERIZATION
POTENTIALS
PYRROLES
SPECIFICITY
STORAGE
SURFACES
WEIGHT
YIELDS
AZOLES
CATALYSTS
CHEMISTRY
COMPLEXES
DIENES
ELECTRO-OPTICAL EFFECTS
ELECTROCHEMICAL CELLS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
IRON COMPLEXES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYENES
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries