Electronically conducting polypyrrole and copolymers of pyrrole, compositions containing them, methods for making them, and electrochemical cells using them

摘要

An electronically conducting composition comprises electropolymerized polypyrrole or a copolymer of pyrrole and contains one or more low mobility anions having an average ionic transference number for said anions during reduction of less than 0.1. The composition may be either porous or non-porous material in the form of films, powders, dendriform materials, or various shapes formed as desired by pressing powders of the composition. The electronically conducting composition can be prepared by several processes which are described, and a preferred process involves a multi-phase system, and more preferably, a two-phase system, one phase being aqueous. These compositions are stable over a range of chemical and electrochemical conditions and are useful in a number of applications, including electrodes for electrochemical cells such as electrochemical energy storage cells.