Abstract
This paper reports the preparation and characterization of some complex-ion (ferricyanide and nitroprusside) doped conducting polymers. The physical properties are evaluated by thermogravimetric and scanning electron microscopic techniques. Results show that doped polypyrrole (PPY) polymers are thermally stable up to 550 °C and have a certain degree of crystallinity with a globular (as opposed to a fibrous) structure. The electrical conductivity of the polymers is between 2 and 10 S cm −1. The polymers can be deposited on iron (inner wall of an AA-size cylindrical vessel) for use as the cathode in the cell: Li/LiClO 4 (saturated) in propylene carbonate (PC) PC/PPY-Fe. The cell exhibits good performances in terms of open-circuit voltage, short-circuit current and discharge behaviour, especially when using a ferricyanide-doped polymer. The behaviour is explained in terms of the presence of transition metal ions inside the polymer matrix.
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