Graphene-Wrapped FeOOH Nanorods with Enhanced Performance as Lithium-Ion Battery Anode.

FeOOH nanorods (NRs) wrapped by reduced graphene oxide (rGO) were fabricated using a facile solvothermal method. When used as anode materials for lithium-ion batteries (LIBs), the FeOOH NRs/rGO composites show a higher capacity (490 mAh g − 1 after 100 cycles at a current density of 100 mA g − 1) and better rate capability than pure FeOOH NRs. The enhanced electrochemical performance can be ascribed to the hybrid structure of FeOOH and rGO. On one hand, the introduction of rGO can improve electronic conductivity and reduce charge-transfer resistance for electrode materials. On the other hand, the distinctive structure (FeOOH NRs surrounded by flexible rGO) can effectively buffer large volume change during the Li +  insertion/extraction process. Our work provides a feasible strategy to obtain high-performance LIBs. FeOOH nanorods (NRs) wrapped by reduced graphene oxide (rGO) were fabricated via a facile solvothermal method and were used as anode materials for LIBs. Compared to FeOOH NRs, FeOOH NRs/rGO composites exhibit a higher specific capacity of 490 mAh g^–1 after 100 cycles at a current density of 100 mA g^–1. TEM examinations show that FeOOH NRs were surrounded by flexible rGO. This wrapping design contributes to the formation of continuous conductive networks that promote rapid transport of electrons. [ABSTRACT FROM AUTHOR]