期刊
JOURNAL OF POWER SOURCES
卷 267, 期 -, 页码 629-634出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.05.136
关键词
Micrometer-scale silicon film; Li-ion battery; High areal capacity; Copper oxide nanofiber; Anode
资金
- International Research Training Group (IRTG) project
- PART project Electrochemical energy storage in autonomous systems [49004401]
- Thousand Talents Program
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
We report a feasible design to fabricate micrometer-scale Si films deposited on nanostructured Cu foil as high areal capacity anodes for Li-ion batteries with excellent cycling performance. Nanostructured copper oxides are prepared by anodic oxidation of Cu foil in alkaline solution. The resultant copper oxide nanofibers function as matrix for thick Si films (1-2 mu m) loading. Metallic Cu nanofibers are obtained by in-situ electrochemical reduction at low potentials, which work as electrical highways for fast electron transport and a reliable mechanical matrix to accommodate volume changes during lithium-silicon alloy/dealloy processes. The engineered thick Si film anode exhibit both high areal capacity (0.48 mAh cm(-2) for 1 mu m Si film and 0.6 mAh cm(-2) for 2 mu m Si film after 200 cycles at 0.225 mA cm(-2)) and excellent rate capability (0.52 mAh cm(-2) at 1.05 mA cm(-2) for 2 mu m Si film). The 2 mu m silicon film electrode is able to recover to the initial value of 1 mAh cm(-2) when the current rate is set back to 0.15 mA cm(-2) even after cycling at high current rates. The reported concept can be a general method for high-loading-film electrodes, which is industrial scalable and compatible with current battery manufacturing processes. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据