| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1296046 | Solid State Ionics | 2016 | 7 Pages |
•LiNi0.5Mn1.5O4/graphene composite materials were successfully synthesized by calcining LiNi0.5Mn1.5O4/GO.•LiNi0.5Mn1.5O4/graphene composite materials presented a thin, compact and uniform coating layer.•LiNi0.5Mn1.5O4/graphene composite materials gave a better electrochemical performance, especially cyclic performance.•This method is suitable for industrial production.
This study aimed to use the excellent properties of graphene as coating for the cathode material LiNi0.5Mn1.5O4. In this work, we added a calcination process based on the graphene oxide coating process from previous studies to obtain the calcined LiNi0.5Mn1.5O4/GO composite. The morphology and structure of the prepared samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Their performance as electrodes of lithium-ion battery was investigated by charge/discharge and cycle performance tests. The calcined LiNi0.5Mn1.5O4/GO composite obtained by the improved method presented a thin, compact, and uniform coating layer and improved the electrochemical performances of LiNi0.5Mn1.5O4 with no effect on the crystal structure. The calcined LiNi0.5Mn1.5O4/GO could deliver a capacity of 131.2 mAh g− 1, which was approximately 10 mAh g− 1 larger than that of LiNi0.5Mn1.5O4. After 280 cycles at 1 C rate, the calcined LiNi0.5Mn1.5O4/GO could still deliver a reversible capacity of 123.2 mAh g− 1, retaining 94% of its initial reversible capacity.
