LAUSR

Abstract Hybridizing nanostructured metal oxides with reduced graphene oxide (RGO) is highly appropriate for the improvement of electrochemical performance of lithium-ion batteries (LIBs). Herein, a NiAl-layered double hydroxide (LDH) is vertically grown on a RGO by the microwave-assisted method without any surfactant or template. The NiAl-LDH/RGO is used as precursor to synthesize sandwich-like porous Al 2 O 3 /RGO anchoring NiO nanocomposite (NiO-Al 2 O 3 /RGO) by subsequent calcination and etching process. Furthermore, doping Al 2 O 3 can prevent active materials from agglomeration and generate porous structure in etching process. When used as anode materials for LIBs, the nanocomposite exhibits a high reversible capacity after 100 charge-discharge cycles at a current density of 100 mA g −1 . Even at 500 mA g −1 , a stable capacity as high as 704 mA h g −1 could be obtained. The enhanced lithium storage performance is mainly ascribed to the presence of the conductive RGO and Al 2 O 3 buffer phase, which can relieve structural collapse and offer high conductivity.