Synergetic approach to achieve enhanced lithium ion storage performance in ternary phased SnO2–Fe2O3/rGO composite nanostructures

Abstract

We report here a study on the Li ion storage performance of binary phased SnO 2 /rGO and ternary phased SnO 2 -Fe 2 O 3 /rGO composite nanostructures. The SnO 2 /rGO and SnO 2 -Fe 2 O 3 /rGO were prepared by a facile wet-chemical approach. The Li storage performances of these samples were closely related to the weight ratio of SnO 2 : rGO or SnO 2 : Fe 2 O 3 : rGO. It was found that ternary SnO 2 -Fe 2 O 3 /rGO composite nanostructures (e.g. with a weight ratio of SnO 2 : Fe 2 O 3 : rGO ¼ 11 : 1 : 13) showed significant enhancement of the specific capacities and cyclabilities as compared to that of SnO 2 /rGO samples. For example, the SnO 2 -Fe 2 O 3 /rGO electrode depicted a specific capacity of 958 mA h g À1 at a current density of 395 mA g À1 (0.5 C) during the 100 th cycle. Such Li storage performances of the SnO 2 -Fe 2 O 3 /rGO electrodes, especially at high current densities (e.g. 530 mA h g À1 at 5 C rate), were also much better than those reported for either SnO 2 -based or Fe 2 O 3 -based electrodes. Such a synergetic effect in the SnO 2 /Fe 2 O 3 /rGO composite nanostructures is promising for the development of advanced electrode materials for rechargeable Li-ion batteries.

Rational design of metal oxide nanocomposite anodes for advanced lithium ion batteries

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Morphology Transition Engineering of ZnO Nanorods to Nanoplatelets Grafted Mo8O23-MoO2 by Polyoxometalates: Mechanism and Possible Applicability to other Oxides

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