High-yield production of few-layer graphene
flakes from graphite is important for the scalable synthesis
and industrial application of graphene. However, high-yield
exfoliation of graphite to form graphene sheets without
using any oxidation process or super-strong acid is challenging.
Here we demonstrate a solution route inspired by the
lithium rechargeable battery for the high-yield (>70%)
exfoliation of graphite into highly conductive few-layer
graphene flakes (average thickness