Growth of linked silicon/carbon nanospheres on copper substrate as integrated electrodes for Li-ion batteries
文献类型：期刊论文
| 作者 | Zhang, Zailei1; Wang, Yanhong1; Tan, Qiangqiang1; Li, Dan1; Chen, Yunfa1; Zhong, Ziyi2; Su, Fabing1 |
| 刊名 | NANOSCALE
 |
| 出版日期 | 2014 |
| 卷号 | 6期号:1页码:371-377 |
| 关键词 | chemical-vapor-deposition binder-free anode lithium secondary batteries high-performance anode high-capacity amorphous-silicon composite anode rechargeable batteries graphite microspheres facile synthesis |
| ISSN号 | 2040-3364 |
| 其他题名 | Nanoscale |
| 中文摘要 | We report the growth of linked silicon/carbon (Si/C) nanospheres on Cu substrate as an integrated anode for Li-ion batteries. The Si/C nanospheres were synthesized by a catalytic chemical vapor deposition (CCVD) on Cu substrate as current collector using methyltrichlorosilane as precursor, a cheap byproduct of the organosilane industry. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermal gravimetry, Raman spectroscopy, nitrogen adsorption, inductively coupled plasma optical emission spectrometry, and X-ray photoelectron spectroscopy. It was found that the linked Si/C nanospheres with a diameter of 400-500 nm contain Si, CuxSi, and Cu nanocrystals, which are highly dispersed in the amorphous carbon nanospheres. A CCVD mechanism was tentatively proposed, in which the evaporated Cu atoms play a critical role to catalytically grown Si nanocrystals embedded within linked Si/C nanospheres. The electrochemical measurement shows that these Si/C nanospheres delivered a capacity of 998.9, 713.1, 320.6, and 817.8 mA h g(-1) at 50, 200, 800, and 50 mA g(-1) respectively after 50 cycles, much higher than that of commercial graphite anode. This is because the amorphous carbon, CuxSi, and Cu in the Si/C nanospheres could buffer the volume change of Si nanocrystals during the Li insertion and extraction reactions, thus hindering the cracking or crumbling of the electrode. Furthermore, the incorporation of conductive CuxSi and Cu nanocrystals and the integration of active electrode materials with Cu substrate may improve the electrical conductivity from the current collector to individual Si active particles, resulting in a remarkably enhanced reversible capacity and cycling stability. The work will be helpful in the fabrication of low cost binder-free Si/C anode materials for Li-ion batteries. |
| 英文摘要 | We report the growth of linked silicon/carbon (Si/C) nanospheres on Cu substrate as an integrated anode for Li-ion batteries. The Si/C nanospheres were synthesized by a catalytic chemical vapor deposition (CCVD) on Cu substrate as current collector using methyltrichlorosilane as precursor, a cheap byproduct of the organosilane industry. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermal gravimetry, Raman spectroscopy, nitrogen adsorption, inductively coupled plasma optical emission spectrometry, and X-ray photoelectron spectroscopy. It was found that the linked Si/C nanospheres with a diameter of 400-500 nm contain Si, CuxSi, and Cu nanocrystals, which are highly dispersed in the amorphous carbon nanospheres. A CCVD mechanism was tentatively proposed, in which the evaporated Cu atoms play a critical role to catalytically grown Si nanocrystals embedded within linked Si/C nanospheres. The electrochemical measurement shows that these Si/C nanospheres delivered a capacity of 998.9, 713.1, 320.6, and 817.8 mA h g(-1) at 50, 200, 800, and 50 mA g(-1) respectively after 50 cycles, much higher than that of commercial graphite anode. This is because the amorphous carbon, CuxSi, and Cu in the Si/C nanospheres could buffer the volume change of Si nanocrystals during the Li insertion and extraction reactions, thus hindering the cracking or crumbling of the electrode. Furthermore, the incorporation of conductive CuxSi and Cu nanocrystals and the integration of active electrode materials with Cu substrate may improve the electrical conductivity from the current collector to individual Si active particles, resulting in a remarkably enhanced reversible capacity and cycling stability. The work will be helpful in the fabrication of low cost binder-free Si/C anode materials for Li-ion batteries. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
| 研究领域[WOS] | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 关键词[WOS] | CHEMICAL-VAPOR-DEPOSITION ; BINDER-FREE ANODE ; LITHIUM SECONDARY BATTERIES ; HIGH-PERFORMANCE ANODE ; HIGH-CAPACITY ; AMORPHOUS-SILICON ; COMPOSITE ANODE ; RECHARGEABLE BATTERIES ; GRAPHITE MICROSPHERES ; FACILE SYNTHESIS |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000328673000043 |
| 公开日期 | 2014-05-06 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/8108]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.ASTAR, Inst Chem Engn & Sci, Singapore 627833, Singapore |
| 推荐引用方式 GB/T 7714 | Zhang, Zailei,Wang, Yanhong,Tan, Qiangqiang,et al. Growth of linked silicon/carbon nanospheres on copper substrate as integrated electrodes for Li-ion batteries[J]. NANOSCALE,2014,6(1):371-377. |
| APA | Zhang, Zailei.,Wang, Yanhong.,Tan, Qiangqiang.,Li, Dan.,Chen, Yunfa.,...&Su, Fabing.(2014).Growth of linked silicon/carbon nanospheres on copper substrate as integrated electrodes for Li-ion batteries.NANOSCALE,6(1),371-377. |
| MLA | Zhang, Zailei,et al."Growth of linked silicon/carbon nanospheres on copper substrate as integrated electrodes for Li-ion batteries".NANOSCALE 6.1(2014):371-377. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。