ShanghaiTech University Knowledge Management System
The Effects of Native Oxide Surface Layer on the Electrochemical Performance of Si Nanoparticle-Based Electrodes | |
2011 | |
发表期刊 | JOURNAL OF THE ELECTROCHEMICAL SOCIETY |
ISSN | 0013-4651 |
卷号 | 158期号:12页码:A1260-1266 |
发表状态 | 已发表 |
DOI | 10.1149/2.007112jes |
摘要 | This study controllably reduces the silicon dioxide (SiO2) layer on Si nanoparticles and evaluates its effect on the performance of Si nanoparticle-based electrodes in Li-ion batteries. Various thicknesses of this native oxide are present on Si nanoparticles generated by chemical vapor deposition (CVD) due to the process conditions and exposure to oxygen during storage. This layer can be effectively reduced by hydrofluoric acid (HF) etching, which results in improved electrochemical performance over as-received samples. As-received Si sample has a higher first-cycle capacity loss than that of the etched Si samples, when the capacity loss is normalized to the surface area of the Si particles. Spectroscopic analysis reveals that when the Si electrode is held at a low potential, the oxide layer can be converted to a more stable silicate form due to the irreversible consumption of lithium species in the cell. The thick SiO2 surface layer also isolates the Si core from lithium-ion alloying; therefore, the as-received Si nanoparticles deliver a lower specific capacity than their etched counterpart. Incomplete lithiation of the as-received Si particles is confirmed by transmission electron microscopy, which shows that nanocrystalline Si domains remain after cycling. The surface insulating effects of SiO2 also cause high impedance in the Si electrode. (C) 2011 The Electrochemical Society. ()[DOI: 10.1149/2.007112jes] All rights reserved. |
URL | 查看原文 |
收录类别 | SCI |
WOS研究方向 | Electrochemistry ; Materials Science |
WOS类目 | Electrochemistry ; Materials Science, Coatings & Films |
WOS记录号 | WOS:000297979300003 |
出版者 | ELECTROCHEMICAL SOC INC |
WOS关键词 | LITHIUM-ION-BATTERIES ; THIN-FILM ELECTRODE ; RECHARGEABLE BATTERIES ; ANODE MATERIAL ; SILICON ; REDUCTION ; STORAGE ; CARBON |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/31103 |
专题 | 个人在本单位外知识产出 |
通讯作者 | Xun, S. |
作者单位 | 1.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA 2.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Xun, S.,Song, X.,Wang, L.,et al. The Effects of Native Oxide Surface Layer on the Electrochemical Performance of Si Nanoparticle-Based Electrodes[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2011,158(12):A1260-1266. |
APA | Xun, S..,Song, X..,Wang, L..,Grass, M. E..,Liu, Z..,...&Liu, G..(2011).The Effects of Native Oxide Surface Layer on the Electrochemical Performance of Si Nanoparticle-Based Electrodes.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,158(12),A1260-1266. |
MLA | Xun, S.,et al."The Effects of Native Oxide Surface Layer on the Electrochemical Performance of Si Nanoparticle-Based Electrodes".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 158.12(2011):A1260-1266. |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 |
个性服务 |
查看访问统计 |
谷歌学术 |
谷歌学术中相似的文章 |
[Xun, S.]的文章 |
[Song, X.]的文章 |
[Wang, L.]的文章 |
百度学术 |
百度学术中相似的文章 |
[Xun, S.]的文章 |
[Song, X.]的文章 |
[Wang, L.]的文章 |
必应学术 |
必应学术中相似的文章 |
[Xun, S.]的文章 |
[Song, X.]的文章 |
[Wang, L.]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
修改评论
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。