Process for the preparation of a polyaniline film, film obtained by this process, and use of this film in an electrochemical generator

摘要

The process consists in oxidising electrochemically with the aid of an anode and of a cathode a compound chosen from aniline and its derivatives, with the exception of benzidine, in an acidic medium, in the presence of cations of at least one transition metal, this oxidation resulting in the formation on the anode of a polyaniline film (7) containing the said cations, in washing the anode coated with the said film and in separating the washed film from the anode. The polyaniline film (7) is employed in particular as a positive electrode active substance of an electrochemical generator of the "credit card" type comprising, in a leakproof enclosure (1, 3), a film of lithium (9) used as negative electrode active substance, separated from the polyaniline film (7) by a separator made of electrolyte-impregnated film (5). IMAGE