| Nanosized Li4Ti5O12/graphene hybrid materials with low polarization for high rate lithium ion batteries | |
| Shi, Ying; Wen, Lei; Li, Feng; Cheng, Hui-Ming | |
| Corresponding Author | Li, Feng(fli@imr.ac.cn) |
| 2011-10-15 | |
| Source Publication | JOURNAL OF POWER SOURCES
 |
| ISSN | 0378-7753 |
| Volume | 196Issue:20Pages:8610-8617 |
| Abstract | We report a simple strategy to prepare a hybrid of lithium titanate (Li4Ti5O12, LTO) nanoparticles well-dispersed on electrical conductive graphene nanosheets as an anode material for high rate lithium ion batteries. Lithium ion transport is facilitated by making pure phase Li4Ti5O12 particles in a nanosize to shorten the ion transport path. Electron transport is improved by forming a conductive graphene network throughout the insulating Li4Ti5O12 nanoparticles. The charge transfer resistance at the particle/electrolyte interface is reduced from 53.9 Omega to 36.2 Omega and the peak currents measured by a cyclic voltammogram are increased at each scan rate. The difference between charge and discharge plateau potentials becomes much smaller at all discharge rates because of lowered polarization. With 5 wt.% graphene, the hybrid materials deliver a specific capacity of 122 mAh g(-1) even at a very high charge/discharge rate of 30C and exhibit an excellent cycling performance, with the first discharge capacity of 132.2 mAh g(-1) and less than 6% discharge capacity loss over 300 cycles at 20C. The outstanding electrochemical performance and acceptable initial columbic efficiency of the nano-Li4Ti5O12/graphene hybrid with 5 wt.% graphene make it a promising anode material for high rate lithium ion batteries. (C) 2011 Elsevier B.V. All rights reserved. |
| Keyword | Lithium titanate Graphene High rate anode materials Lithium-ion batteries |
| Funding Organization | Ministry of Science and Technology of China ; National Science Foundation of China ; Chinese Academy of Sciences |
| DOI | 10.1016/j.jpowsour.2011.06.002 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Ministry of Science and Technology of China[2009AA03Z337] ; National Science Foundation of China[50921004] ; National Science Foundation of China[50632040] ; Chinese Academy of Sciences[KJCX2-YW-231] |
| WOS Research Area | Electrochemistry ; Energy & Fuels |
| WOS Subject | Electrochemistry ; Energy & Fuels |
| WOS ID | WOS:000294739000058 |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/105779 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Li, Feng |
| Affiliation | Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Shi, Ying,Wen, Lei,Li, Feng,et al. Nanosized Li4Ti5O12/graphene hybrid materials with low polarization for high rate lithium ion batteries[J]. JOURNAL OF POWER SOURCES,2011,196(20):8610-8617. |
| APA | Shi, Ying,Wen, Lei,Li, Feng,&Cheng, Hui-Ming.(2011).Nanosized Li4Ti5O12/graphene hybrid materials with low polarization for high rate lithium ion batteries.JOURNAL OF POWER SOURCES,196(20),8610-8617. |
| MLA | Shi, Ying,et al."Nanosized Li4Ti5O12/graphene hybrid materials with low polarization for high rate lithium ion batteries".JOURNAL OF POWER SOURCES 196.20(2011):8610-8617. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment