Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5346796 | Applied Surface Science | 2018 | 25 Pages |
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 Al2O3/RGO anchoring NiO nanocomposite (NiO-Al2O3/RGO) by subsequent calcination and etching process. Furthermore, doping Al2O3 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 gâ1. Even at 500 mA gâ1, a stable capacity as high as 704 mA h gâ1 could be obtained. The enhanced lithium storage performance is mainly ascribed to the presence of the conductive RGO and Al2O3 buffer phase, which can relieve structural collapse and offer high conductivity.
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Authors
Qian Li, Zheng Yi, Yong Cheng, XuXu Wang, Dongming Yin, Limin Wang,