In this article, brief introduction and mechanism of electrochemical capacitors are revised. The main features of electrochemical capacitors and batteries about electrical energy storage devices are also compared. It is well known that various types of materials (organic, inorganic, organic-inorganic composites and organic/organic composites) are being used as electrochemical capacitors. A vast literature is available on the preparation, properties and applications of electrochemical capacitors. In this communication, important aspects related to the synthesis and evaluation of organic electrodes for use in electrochemical capacitors is encapsulated.