Nanosized Li(4)Ti(5)O(12)/graphene hybrid materials with low polarization for high rate lithium ion batteries
文献类型：期刊论文
| 作者 | Y. Shi ; L. Wen ; F. Li ; H. M. Cheng |
| 刊名 | Journal of Power Sources
 |
| 出版日期 | 2011 |
| 卷号 | 196期号:20页码:8610-8617 |
| 关键词 | Lithium titanate Graphene High rate anode materials Lithium-ion batteries anode material electrochemical performance nanocrystalline li4ti5o12 reversible capacity cyclic performance spinel li4ti5o12 rate capability graphene composite insertion |
| ISSN号 | 0378-7753 |
| 中文摘要 | We report a simple strategy to prepare a hybrid of lithium titanate (Li(4)Ti(5)O(12), 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 Li(4)Ti(5)O(12) particles in a nanosize to shorten the ion transport path. Electron transport is improved by forming a conductive graphene network throughout the insulating Li(4)Ti(5)O(12) 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-Li(4)Ti(5)O(12)/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. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/30662]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Y. Shi,L. Wen,F. Li,et al. Nanosized Li(4)Ti(5)O(12)/graphene hybrid materials with low polarization for high rate lithium ion batteries[J]. Journal of Power Sources,2011,196(20):8610-8617. |
| APA | Y. Shi,L. Wen,F. Li,&H. M. Cheng.(2011).Nanosized Li(4)Ti(5)O(12)/graphene hybrid materials with low polarization for high rate lithium ion batteries.Journal of Power Sources,196(20),8610-8617. |
| MLA | Y. Shi,et al."Nanosized Li(4)Ti(5)O(12)/graphene hybrid materials with low polarization for high rate lithium ion batteries".Journal of Power Sources 196.20(2011):8610-8617. |
入库方式： OAI收割
来源：金属研究所
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