Carbon electrodeposition in molten salts: electrode reactions and applications

Abstract

The chemistry of carbon deposition in molten salts has been studied by a number of researchers with quite different interpretations of the reactions involved. This paper therefore reviews and discusses available literature on the cathodic and anodic reaction mechanisms of carbon electrodeposition in molten carbonate salts, particularly considering new voltammetric studies. The effects of process variables (e.g. salt composition, temperature, voltage, electrode material etc.) on the electrochemical process are also addressed. Description of the properties of the deposited carbon and how these properties transfer to potential applications in energy storage and electricity production (carbon re-oxidation) are discussed.