Engineering nano-composite Li4Ti5O12 anodes via scanning electron-probe fabrication
文献类型：期刊论文
| 作者 | Su, D ; Wang, F ; Ma, C ; Jiang, N |
| 刊名 | NANO ENERGY
 |
| 出版日期 | 2013 |
| 卷号 | 2期号:3页码:343 |
| 关键词 | Li4Ti5O12 anode Electronic conductivity Nano-composite-particle Scanning transmission electron microscopy |
| ISSN号 | 2211-2855 |
| 通讯作者 | Su, D (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. |
| 中文摘要 | Spinel lithium tianate Li4Ti5O12 (s-LTO) is attractive for its usage as the anode material in lithium-ion batteries due to its excellent cycling stability, but such an application is very often limited by its low electronic conductivity. This work demonstrates a new electron-probe nanofabrication approach to improving the electronic conductivity of spinet s-LTO. The conducting nano-channels through the s-LTO nanoparticles with the lateral dimension of similar to 2 nm are fabricated using a sub-nm electron probe in a scanning transmission electron microscope (STEM). These nano-channels consist of a single phase of Li4Ti5O12-x with a rocksalt structure (r-LTO). Using in-situ I-V measurements, we show a gradual increase of electronic conductivity of a single r-LTO nanoparticle up to 5 orders of magnitude of the original s-LTO phase under e-beam irradiation. The local structural analysis, through electron diffraction and high-resolution STEM imaging, reveals the lattice coherence between the induced r-LTO phase and s-LTO, with an orientation relationship of < 110 >(r-LTO)/< 110 >(s-LTO) and {111}(r-LTO)//{111}(s-LTO). Moreover, under the electron irradiation, the O lattice retains, while all the tetrahedral-coordinated Li ions in the s-LTO migrate to the octahedral sites during the phase transformation. Our results suggest that the s-LTO/r-LTO nano-composite particles with enhanced electronic conductivity are an excellent candidate for the anode materials for lithium-ion batteries. (C) 2012 Elsevier Ltd. All rights reserved. |
| 资助信息 | US Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]; DOE [DE-FG52-09NA29451]; New York Battery and Energy Storage Technology (NYBEST) Consortium [18509] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56966]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Su, D,Wang, F,Ma, C,et al. Engineering nano-composite Li4Ti5O12 anodes via scanning electron-probe fabrication[J]. NANO ENERGY,2013,2(3):343. |
| APA | Su, D,Wang, F,Ma, C,&Jiang, N.(2013).Engineering nano-composite Li4Ti5O12 anodes via scanning electron-probe fabrication.NANO ENERGY,2(3),343. |
| MLA | Su, D,et al."Engineering nano-composite Li4Ti5O12 anodes via scanning electron-probe fabrication".NANO ENERGY 2.3(2013):343. |
入库方式： OAI收割
来源：物理研究所
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