Recent advances in applications of graphene-layered double hydroxide nanocomposites in supercapacitors and batteries

Highly determined materials have been applied to energy storage devices such as supercapacitors, batteries, etc., to investigate their electrochemical features and match them with ongoing technological developments. In this regard, electrodes based on graphene and layered double hydroxide with two divergent charge-storage mechanisms have been perused to expand the energy storage functionalities. Graphene materials as efficient electrodes have occupied a significant place in supercapacitors and batteries due to their outstanding electrical conductivity, flexibility, and large surface area. Additionally, according to the substantial electrochemical charge transport capabilities, layered double hydroxides are extensively employed in energy storage devices. This review comprehensively investigates the cooperation effect of the electrode composites of the graphene materials and layered double hydroxides and their optimization progress. The electrochemical characteristics of the electrodes have been considered, including specific capacitance, energy density, power density, and capacity retention, affected by pH, synthesis method, reaction temperature, and time. Eventually, the future trend of the electrode materials and their enhancing performance perspective is represented.