Low temperature synthesis of NiO/Co_3O_4 composite nanosheets as high performance Li-ion battery anode materials  

作　　者：LIANG QingQin LI YueMing LI JingHong 

机构地区：[1]Department of Chemistry Tsinghua University,Beijing 100084,China [2]State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China

出　　处：《Chinese Science Bulletin》2012年第32期4195-4198,共4页

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)

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.

关 键 词：锂离子电池 负极材料 低温合成 复合材料 纳米 性能 X-射线粉末衍射 透射电子显微镜 

分 类 号：TM912[电气工程—电力电子与电力传动]