Poly-p-Nitrophenylpyrrole Films as Electrodes for Batteries
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
The electrochemical properties of poly-p-nitrophenylpyrrole films render them useful for battery applications. These films can be prepared electrochemically from p-nitrophenylpyrrole. The polymer in the films is electroactive and it can be switched between the cationic, neutral and anionic state. The material is stable in these reactions in aprotic electrolyte, e.g., Et NC10(4)/CH(3)CN, and can be switched repeatedly with coulombic reversibility. The pyrrole structure is oxidized at +0.7 V (vs. SSCE) and the nitrophenyl group is reduced at -1.1 V (vs. SSCE). The The equilibrium stoichiometry of these reactions is 0.18 F/mole of pyrrole unit for the oxidation reaction (100 mC/mg of film) and one F/mole of nitrophenyl group for the reduction reaction (500 mC/mg of film).