SUMMARY

Two-dimensional (2D) materials have gained numerous attentions for their unique properties and exhibited promising performances in various research fields. However, demanding production techniques for 2D materials impede their practical use. Electrochemical exfoliation is one of the efficient scalable production methods to produce high-quality 2D materials. Here, graphene as a pioneering 2D material was electrochemically exfoliated with various processing parameters. The key factor for efficient exfoliation was binding energy between the intercalator and graphene sheets. Repulsive binding energy allows competent diffusion of intercalator in-between graphite layers, and thereby boosts the delamination process. This study is to demonstrate sustainable electrochemical exfoliation of graphene for the feasible study of as the energy storage system. Layer-controlled graphene coated separator is demonstrated to construct stable Li plating/stripping as protective layer in Li metal batteries.