Electro-active polymers are important new class of semiconducting materials having unique and fascinating electronic transport properties, which is the prerequisite condition for making electrode materials for developing high performance devices like light emitting diodes, photodiodes, laser, batteries and capacitors. Among the different types of conducting polymers, polyaniline stands out as a separate class of conducting polymer, due to reversible electrochemical redox phenomenon, easy method of preparation and low cost. Making use of these advantageous properties doped polyaniline (d-PAn) materials have been put into practical application in fabricating rechargeable batteries by us. Cylindrical batteries have been designed with the configuration of Zn/d-PAn + electrolyte/Carbon. These batteries showed very good output characteristics delivering an open-circuit voltage of 1.433 V and a short-circuit current of 0.6 A. They showed good charge-discharge characteristics and satisfactory shelf life.
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