期刊
JOURNAL OF POWER SOURCES
卷 244, 期 -, 页码 280-286出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.01.053
关键词
Lithium ion battery; Molybdenum disulfide; Graphene nanoplatelet; Chemically converted graphene and composite
资金
- Ministry of Knowledge Economy (MIKE), Korea Institute for Advancement of Technology (KIAT) through the Inter-ER Cooperation Projects
We report a facile method to prepare the MoS2 graphene composites by liquid phase co-exfoliation of commercial MoS2 with graphene nanoplatelet (GnP) and chemically converted graphene (CCG) in N-methyl pyrrolidone with the aid of ultrasonication. The combination of SEM, XRD and BET results reveal that the MoS2 graphene composites are mesoporous materials consisting of very thin MoS2 flakes and graphene sheets. The prepared MoS2 graphene composites display good performance as anode materials for lithium ion batteries. Exfoliation of the MoS2 is the key factor for high electrochemical lithiation/delithiation performance. The MoS2/CCG composite exhibits the best reversible capacity (up to 750 mA h g(-1) after 50 cycles), excellent cycling stability and high rate capability. The reversible capacity at a rate of 2000 mA g(-1) is over 350 mA h g(-1) and recovers to as high as 720 mA h g(-1) at a rate of 100 mA g(-1). (C) 2013 Elsevier B.V. All rights reserved.
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