Abstract
Supercapacitor, an evolving storage device, has drawn the attention of scientists due to its excellent cycle life, rapid charging capacity, and high power density without any fear of detonation and thermal instability. Amongst the various electrode materials for supercapacitors, conducting polymers have evolved as favourable possibilities due to their high conductivity, mechanical flexibility, and scalable characteristics. As opposed to conventional carbon-based or metal oxide electrodes, CPs put forward an eccentric union of rapid redox reactions and structural diversity, allowing higher energy density. However, in the traditional electrode fabrication technique, the inclusion of non-conductive binders without any electrochemical activity decreases the active material load and enhances the electrode’s resistance, thus limiting its electrochemical performance. Hence, the binder-free electrode approach, such as substrate-mediated growth, self-assembly methods, and novel technologies, efficiently improves its energy density and electrochemical performance. This review has briefly summarized the various synthetic approaches for fabricating binder-free electrodes and meticulously examined the latest advancements of various binder-free conducting polymers-based electrodes, especially focussing on polypyrrole, polyaniline, and polythiophene, among others. Moreover, the functioning of these supercapacitors is scrutinized and compared. At last, the persisting challenges and potential research indications are also specified.
Published Version
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