Study of LiFePO4 cathode modified by graphene sheets for   high-performance lithium ion batteries

doi:10.1016/j.electacta.2012.10.050

CORC > 北京大学 > 化学与分子工程学院

	Study of LiFePO4 cathode modified by graphene sheets for high-performance lithium ion batteries
	Bi, Hui ; Huang, Fuqiang ; Tang, Yufeng ; Liu, Zhanqiang ; Lin, Tianquan ; Chen, Jian ; Zhao, Wei
刊名	电化学学报
	2013
关键词	Graphene Lithium ion battery LiFePO4 Cathode Rate performance HIGH-QUALITY DOPED GRAPHENE CARBON GRAPHITE COMPOSITES ELECTRODES NANOWIRES CAPACITY STORAGE GROWTH
DOI	10.1016/j.electacta.2012.10.050
英文摘要	Here three kinds of graphene preparation strategies, namely, chemical vapor deposition (CVD), Wurtz-type reductive coupling reaction and chemical exfoliation, respectively, have been developed to synthesize large-scale high-quality graphene for improving the electrochemical properties of LiFePO4 (LFP) cathodes. The flexible graphene sheets as effective conduction channels possess larger surface area to load more LFP nanoparticles (NPs). The amount of the 5 wt% graphene additive greatly reduces the contact resistance between LFP NPs, and dramatically enhances the electrical conductivity and electrochemical performances of the cathodes. Particularly, when the large-size, defect-free and highly crystalline CVD graphene sheets are used to modify LFP cathodes, the capacities reach up to 132 mA h g(-1) and 80 mA h g(-1) at 1C and 20C discharge rates, and the corresponding capacity decay rates are 3.1% and 6.5% after 100 cycles, respectively. The excellent performance shows that the graphene-modified LFP is promising cathodes for high rate lithium ion batteries. (c) 2012 Elsevier Ltd. All rights reserved.; Electrochemistry; SCI(E); EI; 22; ARTICLE; 414-420; 88
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/227002]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Bi, Hui,Huang, Fuqiang,Tang, Yufeng,et al. Study of LiFePO4 cathode modified by graphene sheets for high-performance lithium ion batteries[J]. 电化学学报,2013.
APA	Bi, Hui.,Huang, Fuqiang.,Tang, Yufeng.,Liu, Zhanqiang.,Lin, Tianquan.,...&Zhao, Wei.(2013).Study of LiFePO4 cathode modified by graphene sheets for high-performance lithium ion batteries.电化学学报.
MLA	Bi, Hui,et al."Study of LiFePO4 cathode modified by graphene sheets for high-performance lithium ion batteries".电化学学报 (2013).