Facile synthesis of CoSnO3/Graphene nanohybrid with superior lithium storage capability

• CoSnO3/G nanocomposite has been synthesized by an in-situ hydrothermal route.
• CoSnO3 nanoparticles with a narrow size distribution are homogeneously attached on graphene sheets.
• The nanocomposite shows improved electrochemical properties compared to bare oxide.
• The performance enhancement is due to the combined buffering, confining and conducting effects of graphene.

CoSnO3/G nanohybrid has been synthesized by thermal annealing of CoSn(OH)6/G, prepared by a facile in situ solvothermal route using CoSO4, K2SnO3 and GO as precursors and has been investigated as a promising high-performance anode material for Li-ion batteries. The CoSnO3 nanocrystals are uniformly dispersed and immobilized by graphene nanosheets reduced from GO. The CoSnO3/G composite exhibits superior cycling stability and rate capability compared to bare CoSnO3. The improvement in electrochemical performance can be attributed to the combined conducting, confining and dispersing effects of graphene for the CoSnO3 nanocrystals.