Linear and non-linear pseudocapacitances with or without diffusion control

Pseudocapacitance is an important reversible charge storage mechanism in many electrode materials. Although the concept was first proposed early 1960s, it has been more widely studied following observation of rectangular cyclic voltammograms (CVs) when testing some transition metal oxides and electronically conducting polymers, association with supercapacitor. However, interpretation pseudocapacitance inconsistent literature. all agree that materials are pseudocapacitive if they undergo Faradaic reactions exhibit CVs, have regarded any surface confined which may present non-rectangular or even peak-shaped CVs to be pseudocapacitive. In case amount stored a linear function potential, whilst for relationship non-linear. It shown this article only relevance supercapacitor, but non-linear find applications rechargeable battery supercapattery. Further, clarified equation i ?= ?k1v ?+ ?k2v1/2 useful analysis kinetics terms confinement diffusion control. kinetic blind thermodynamically determined mechanisms as by experimental evidence, should not used differentiate non-capacitive processes from pseudocapacitance, either