期刊
ELECTROCHIMICA ACTA
卷 149, 期 -, 页码 86-93出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.10.093
关键词
LiNi0.8Co0.1Mn0.1O2; lithium-ion batteries; graphene; composite
资金
- National Natural Science Foundation of China [51102134, 21201010]
- New Century Excellent Talents of the University in China [NCET-13-0645]
- Natural Science Foundation of Jiangsu Province [BK20131349, BK2011709]
- QingLan Project of Jiangsu Province, China Postdoctoral Science Foundation [2013M530258]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1202001B]
Layered LiNi0.8Co0.1Mn0.1O2-graphene composite is synthesized by a facile chemical approach and used as the cathode material for lithium-ion batteries. The structural and morphological features of asprepared LiNi0.8Co0.1Mn0.1O2-graphene composite are investigated with powder X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy. The characterization results indicate that the LiNi0.8Co0.1Mn0.1O2 particles maintain their structural integrity and crystal features after being enwrapped with graphene nanosheets. The graphene-modified LiNi0.8Co0.1Mn0.1O2 comoposite exhibits superior electrochemical performance compared to the pristine LiNi0.8Co0.1Mn0.1O2 powders. The LiNi0.8Co0.1Mn0.1O2-graphene composite shows a large initial discharge capacity up to 212.9 mAh g(-1) as well as good cycling performance and good rate capability. The outstanding electrochemical performance of the graphene-modified LiNi0.8Co0.1Mn0.1O2 composite can be attributed to the improved electrical conductivity and structural stability due to the highly conductive graphene matrix. (C) 2014 Elsevier Ltd. All rights reserved.
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