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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
Source PublicationAcs Nano ; Acs Nano
ISSN1936-0851 ; 1936-0851
Volume5Issue:7Pages:5463-5471
AbstractOne 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.
description.department[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
KeywordDoped 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 IDWOS:000293035200022 ; WOS:000293035200022
Citation statistics
Cited Times:1618[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/30778
Collection中国科学院金属研究所
Recommended Citation
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.
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