In this study, we demonstrate the synthesis of a composite with SnO2 nanoparticles anchored on three-dimensional (3D) reduced graphene oxide (RGO) as an anode for Li ion batteries (LIBs). SnO2 nanoparticles were uniformly deposited on the surface of RGO sheets and the resulting RGO-SnO2 architecture had an interconnected hierarchical structure. This hierarchical RGO-SnO2 architecture exhibited outstanding electrochemical performance with a high reversible capacity of 810 mAh g-1 at 0.1 A g-1 and a high rate capacity of 210 mAh g-1 at 2 A g-1. Moreover, this architecture achieves 99% capacity retention even after 150 cycles at 0.1 A g-1. The improved performance of the RGO-SnO2 architecture is attributed to the uniform dispersion of SnO2 nanoparticles and the 3D macroporous continuity, which afford a highly accessible area, easy ion accessibility, a short ion diffusion length, and rapid mass and charge transport. The composite described here is practically useful in the development of high-energy-density anode materials for LIBs.
Bibliographical notePublisher Copyright:
© 2016 The Royal Society of Chemistry.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics