期刊
MATERIALS RESEARCH BULLETIN
卷 46, 期 6, 页码 858-864出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2011.02.011
关键词
Microporous materials; Oxides; Chemical synthesis; Raman spectroscopy; Electrochemical properties
资金
- Ministry of Higher Education of the Government of Malaysia
- Australian Research Council (ARC) [LP0775456]
- Australian Research Council [LP0775456] Funding Source: Australian Research Council
We report a simple molten salt method to prepare nanosize alpha-Fe2O3, as well as its electrochemical performance as anode material for lithium ion batteries. The structure and morphology were confirmed by Raman spectroscopy, X-ray diffraction, and transmission electron microscopy. The as-prepared alpha-Fe2O3 is a rhombohedral phase of hematite with crystal size in the range of 20-40 nm. The electrochemical measurements were performed using the as-prepared powders as the active material for a lithium-ion cell. The nanosized alpha-Fe2O3 shows excellent cycling performance and rate capability. It also exhibits the feature of capacity increase upon cycling. The outstanding electrochemical performance of the alpha-Fe2O3 can be related to several factors, namely, the short Li+ diffusion length along the porous rhombohedral structures and the nanosized nature of the materials, which decreases the traverse time for electrons and Li+ ions, and reduces the volume expansion to some extent during charge/discharge reactions. (C) 2011 Elsevier Ltd. 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