Shape evolution of patterned amorphous and polycrystalline silicon microarray thin film electrodes caused by lithium insertion and extraction
文献类型：期刊论文
| 作者 | He, Y ; Yu, XQ ; Li, G ; Wang, R ; Li, H ; Wang, YL ; Gao, HJ ; Huang, XJ |
| 刊名 | JOURNAL OF POWER SOURCES
 |
| 出版日期 | 2012 |
| 卷号 | 216页码:131 |
| ISSN号 | 0378-7753 |
| 关键词 | LI-ION BATTERIES CRACK PATTERNS SI ANODE LITHIATION NANOWIRES |
| 通讯作者 | Li, H (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Silicon is the most promising high capacity anode material to replace graphite for developing next generation high energy density Li-ion batteries. In this approach, patterned amorphous and microcrystalline Si thin film electrodes (a-Si and mu c-Si) have been prepared by rf-sputtering and etched further by a reactive ion etching (RIE) system to form square-shape microcolumn electrodes with controllable size (5 x 5 mu m width, 500 nm height, aspect ratio of width/height is 10:1) and array distance (5 mu m). It has been found that the volume expansion and contraction of a-Si and mu c-Si are anisotropic, about 180% along vertical direction and 40% along lateral direction. The total volume variation changes linearly with the increase of lithium insertion content up to similar to 310% for a-Si and similar to 300% for mu c-Si. It occurs nearly reversibly. In addition, it is observed that the original square-shape Si column transforms into the domelike appearance after lithium insertion and changes into bowl shape after lithium extraction gradually. Radial-like curved cracks are formed after 5-10 cycles and the neighboring Si columns tend to merge together when the distance of the columns is less than 1 mu m. (C) 2012 Elsevier BM. All rights reserved. |
| 资助信息 | CAS [KJCX2-YW-W26]; NSFC [50730005]; "973" project [201203932900]; "863" project [2009AA033101] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/52499]  |
| 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 | He, Y,Yu, XQ,Li, G,et al. Shape evolution of patterned amorphous and polycrystalline silicon microarray thin film electrodes caused by lithium insertion and extraction[J]. JOURNAL OF POWER SOURCES,2012,216:131. |
| APA | He, Y.,Yu, XQ.,Li, G.,Wang, R.,Li, H.,...&Huang, XJ.(2012).Shape evolution of patterned amorphous and polycrystalline silicon microarray thin film electrodes caused by lithium insertion and extraction.JOURNAL OF POWER SOURCES,216,131. |
| MLA | He, Y,et al."Shape evolution of patterned amorphous and polycrystalline silicon microarray thin film electrodes caused by lithium insertion and extraction".JOURNAL OF POWER SOURCES 216(2012):131. |
入库方式： OAI收割
来源：物理研究所
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