Doped Graphene Sheets As Anode Materials with Superhigh Rate and Large Capacity for Lithium Ion Batteries

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	Doped Graphene Sheets As Anode Materials with Superhigh Rate and Large Capacity for Lithium Ion Batteries; Doped Graphene Sheets As Anode Materials with Superhigh Rate and Large Capacity for Lithium Ion Batteries
	Z. S. Wu; W. C. Ren; L. Xu; F. Li; H. M. Cheng
	2011 ; 2011
发表期刊	Acs Nano ; Acs Nano
ISSN	1936-0851 ; 1936-0851
卷号	5 期号:7 页码:5463-5471
摘要	One great challenge in the development of lithium ion batteries is to simultaneously achieve high power and large energy capacity at fast charge and discharge rates for several minutes to seconds. Here we show that nitrogen- or boron-doped graphene can be used as a promising anode for high-power and high-energy lithium ion batteries under high-rate charge and discharge conditions. The doped graphene shows a high reversible capacity of >1040 mAh g(-1) at a low rate of 50 mA g(-1). More importantly, it can be quickly charged and discharged in a very short time of 1 h to several tens of seconds together with high-rate capability and excellent long-term cyclability. For example, a very high capacity of similar to 199 and 235 mAh g(-1) was obtained for the N-doped graphene and B-doped graphene at 25 A g(-1) (about 30 s to full charge). We believe that the unique two-dimensional structure, disordered surface morphology, heteroatomic defects, better electrode/electrolyte wettability, increased intersheet distance, improved electrical conductivity, and thermal stability of the doped graphene are beneficial to rapid surface Li(+) absorption and ultrafast Li(+) diffusion and electron transport, and thus make the doped materials superior to those of pristine chemically derived graphene and other carbonaceous materials.; One great challenge in the development of lithium ion batteries is to simultaneously achieve high power and large energy capacity at fast charge and discharge rates for several minutes to seconds. Here we show that nitrogen- or boron-doped graphene can be used as a promising anode for high-power and high-energy lithium ion batteries under high-rate charge and discharge conditions. The doped graphene shows a high reversible capacity of >1040 mAh g(-1) at a low rate of 50 mA g(-1). More importantly, it can be quickly charged and discharged in a very short time of 1 h to several tens of seconds together with high-rate capability and excellent long-term cyclability. For example, a very high capacity of similar to 199 and 235 mAh g(-1) was obtained for the N-doped graphene and B-doped graphene at 25 A g(-1) (about 30 s to full charge). We believe that the unique two-dimensional structure, disordered surface morphology, heteroatomic defects, better electrode/electrolyte wettability, increased intersheet distance, improved electrical conductivity, and thermal stability of the doped graphene are beneficial to rapid surface Li(+) absorption and ultrafast Li(+) diffusion and electron transport, and thus make the doped materials superior to those of pristine chemically derived graphene and other carbonaceous materials.
部门归属	[wu, zhong-shuai; ren, wencai; xu, li; li, feng; cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;ren, wc (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;wcren@imr.ac.cn cheng@imr.ac.cn ; [wu, zhong-shuai; ren, wencai; xu, li; li, feng; cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;ren, wc (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;wcren@imr.ac.cn cheng@imr.ac.cn
关键词	Doped Graphene Doped Graphene Anode Anode Lithium Ion Batteries Lithium Ion Batteries High Rate High Rate Nitrogen Nitrogen Boron Boron High-rate Capability High-rate Capability Electrochemical Capacitors Electrochemical Capacitors Carbon Nanotubes Carbon Nanotubes Li Li Storage Storage Electrodes Electrodes Energy Energy Performance Performance Nanosheets Nanosheets Diffusion Diffusion Films Films
URL	查看原文 ; 查看原文
WOS记录号	WOS:000293035200022 ; WOS:000293035200022
引用统计	被引频次：1876[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30778
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. S. Wu,W. C. Ren,L. Xu,et al. Doped Graphene Sheets As Anode Materials with Superhigh Rate and Large Capacity for Lithium Ion Batteries, Doped Graphene Sheets As Anode Materials with Superhigh Rate and Large Capacity for Lithium Ion Batteries[J]. Acs Nano, Acs Nano,2011, 2011,5, 5(7):5463-5471, 5463-5471.
APA	Z. S. Wu,W. C. Ren,L. Xu,F. Li,&H. M. Cheng.(2011).Doped Graphene Sheets As Anode Materials with Superhigh Rate and Large Capacity for Lithium Ion Batteries.Acs Nano,5(7),5463-5471.
MLA	Z. S. Wu,et al."Doped Graphene Sheets As Anode Materials with Superhigh Rate and Large Capacity for Lithium Ion Batteries".Acs Nano 5.7(2011):5463-5471.