One-step solid-state synthesis of sulfur-reduced graphene oxide composite for lithium-sulfur batteries

A novel sulfur-reduced graphene oxide composite was prepared via a facile one-step solid-state method. The composite was characterized by means of XRD, Raman, XPS, SEM, and TEM (HR-TEM) techniques. After being directly heated in the presence of sulfur powder, the freeze-dried graphene oxide was reduced, and a homogeneous composite containing sulfur simultaneously formed. The obtained composite display good electrochemical performance when used as a cathode for lithium-sulfur batteries.