A facile one-pot reduction method for the preparation of a SnO/SnO2/GNS composite for high performance lithium ion batteries

Abstract

A SnO/SnO₂/GNS composite with controlled oxidation states and composition has been prepared through simple one-pot reduction of an EG suspension of SnCl₂ and graphene oxide. The as-prepared composite was characterized by XRD, FT-IR, XPS, SEM, TEM and BET. SnO and SnO₂ nanoparticles are uniformly distributed on the surface of the graphene. Taking advantage of the high electron conductivity of graphene and the large theoretical capacity of SnO, this SnO/SnO₂/GNS composite exhibits high charge/discharge capacity, good cycling stability and good rate capability. A specific discharge capacity of approximately 464.2 mA h g⁻¹ is retained after being charged/discharged at a current density of 1000 mA g⁻¹ for 30 cycles.