SnO2-Fe2O3 embedded in graphene nanosheets enhances conductivity and stable structure as a high-performance anode material for lithium-ion batteries

SnO 2 /Fe 2 O 3 /graphene nanocomposites were prepared by ball milling in planetary ball mill. SnO 2 /Fe 2 O 3 nanoparticles are homogeneously fixed in graphite dilute nanosheets. It is worth noting that Fe 2 O 3 nanoparticles can inhibit the agglomeration of SnO 2 and it can also shorten the propagation path of Li + and electrons. The nanostructure of graphene has excellent electrical conductivity and mechanical properties, which can simultaneously buffer the SnO 2 volume change, inhibit the pulverization of the Fe 2 O 3 , and enhance the electrical contact of the electrode. Consequently, SnO 2 /Fe 2 O 3 /graphene nanocomposite material after 100 cycles displayed an excellent reversible capacity of 1280.2 mA/g at 0.2 A/g, with an outstanding rate capacity of 669.5 mA/g even at 1.0 A/g. After 450 cycles, the nanocomposite material achieved outstanding long-term cycling stability of 1694.9 mAg −1 at 1.0 Ag −1 .