Facile fabrication of mesoporous SnO2@N-rGO nanocomposites by electrostatic self-assembly as anode for high performance lithium-ion batteries

Abstract

Tin dioxide (SnO2) have been considered to be a promising anode material for high performance lithium-ion batteries (LIBs) due to its high lithium storage capacity of as high as 1494 mAh g−1, which has been impeded greatly due to its large volumetric expansion and low conductivity. Thus, the simple but effective approach for the fabrication of SnO2-based material is ever-urgent. To this end, the mesoporous SnO2@N-rGO nanocomposites were designed and fabricated by a simple and scalable electrostatic self-assembly method and investigated electrochemically as anode for LIBs. The results show that the as-obtained mesoporous SnO2@N-rGO nanocomposites exhibit an excellent cycling stability and outstanding rate capability after an initial activation due to the formation of SEI layer on the surface, which are mainly ascribed to the synergistic effect of nano-SnO2, high conductive N-doped rGO matrix network and rich mesopores. Therefore, this work offers an ingenious strategy to design and fabricate the SnO2-based anode material for high performance lithium-ion batteries.