Enhancement of the Cyclability of a Si Anode through Co3O4 Coating by the Sol Gel Method

被引：48
作者：
Hwa, Yoon [1 ]
Kim, Won-Sik [1 ]
Yu, Byeong-Chul [1 ]
Hong, Seong-Hyeon [1 ]
Sohn, Hun-Joon [1 ]
机构：
[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 14期
基金：
新加坡国家研究基金会;
关键词：
NEGATIVE-ELECTRODE MATERIALS; HIGH-PERFORMANCE ANODE; LITHIUM-ION BATTERIES; FACILE FABRICATION; SILICON NANOWIRES; HIGH-CAPACITY; FILMS; COMPOSITE; STORAGE;
D O I：
10.1021/jp401333v
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A nano-Si/Co3O4 coreshell nanostructured material has been successfully prepared using the solgel method. The reaction mechanism between Li and the nano-Si/Co3O4 coreshell nanostructured electrode was investigated by ex situ analyses. Metallic Co, Li21Si8, and amorphous Li2O phases were formed when fully lithiated, and an amorphous Si, Co3O4, and Co phases were identified after charge, indicating that the Co3O4 was partially reversible. The nano-Si/Co3O4 coreshell nanostructured electrode showed excellent cyclability, with a reversible capacity of ca. 850 mAh/g over 100 cycles.
引用
收藏
页码：7013 / 7017
页数：5
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