摘要
NiO/Co3O4 composite nanosheets have been synthesized via a facile method at low temperature for the first time.The as prepared materials were characterized by X-ray powder diffraction(XRD) and transmission electron microscopy(TEM),and the performance of Li-ion batteries(LIBs) as anode materials were also studied.By controlling the atom ratio of Ni:Co,not only the size of the nanosheets can be controlled,the electrode's conductivity and stability could also be greatly improved.The composite material showed a stable capacity retention during cycling(87% of the second capacity was retained after 15 cycles) even at a relatively large current rate(400 mA/g).The NiO/Co3O4 nanosheet might be promising candidate anode materials in high performance Li-ion batteries.
NiO/Co3O4 composite nanosheets have been synthesized via a facile method at low temperature for the first time, The as prepared materials were characterized by X-ray powder diffraction （XRD） and transmission electron microscopy （TEM）, and the performance of Li-ion batteries （LIBs） as anode materials were also studied. By controlling the atom ratio of Ni ： Co, not only the size of the nanosheets can be controlled, the electrode＇s conductivity and stability could also be greatly improved. The composite material showed a stable capacity retention during cycling （87% of the second capacity was retained after 15 cycles） even at a relatively large current rate （400 mA/g）. The NiO/Co3O4 nanosheet might be promising candidate anode materials in high performance Li-ion batteries.
基金
supported by the National Natural Science Foundation of China (11079002)
the National Basic Research Program of China (2011CB935700)
the Research Fund of Ministry of Education of China (20110002130007)
