Soft template PEG-assisted synthesis of Fe3O4@C nanocomposite as superior anode materials for lithium-ion batteries
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- 作者：Xianhua Hou ; Wanli Zhang ; Xinyu Wang ; Shejun Hu ; Changming Li
- 关键词：Anode materials ; Fe3O4@C nanocomposite ; Hydrothermal method ; Amorphous carbon layer
- 刊名：Chinese Science Bulletin
- 出版年：2015
- 出版时间：May 2015
- 年：2015
- 卷：60
- 期：9
- 页码：884-891
- 全文大小：1,928 KB
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29.Liu H, Wang GX, Wang JZ et al - 作者单位：Xianhua Hou (1) (2)
Wanli Zhang (1)
Xinyu Wang (1)
Shejun Hu (1) (2)
Changming Li (3)
1. Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou, 510006, China
2. Engineering Research Center of Materials and Technology for Electrochemical Energy Storage Ministry of Education, South China Normal University, Guangzhou, 510006, China
3. School of Mechanical and Electrical Engineering, Wuyi University, Jiangmen, 529020, China - 刊物主题：Science, general; Life Sciences, general; Physics, general; Chemistry/Food Science, general; Earth Sciences, general; Engineering, general;
- 出版者：Springer Berlin Heidelberg
- ISSN：1861-9541
文摘
Carbon-encapsulated Fe3O4 composites were successfully fabricated via hydrothermal method and examined by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The Fe3O4@C nanocomposite as an anode material with novel structure demonstrated excellent electrochemical performance, with enhanced specific reversible capacity (950?mAh/g at the current density of 50?mA/g after 50 cycles), remarkable rate capability (more than 650?mAh/g even at the current density of 1,000?mA/g) and good cycle ability with less capacity fading (2.4?% after 50 cycles). Two factors have been attributed to the ultrahigh electrochemical performance: Firstly, the 30- to 50-nm spherical structure with a short diffusion pathway and the amorphous carbon layer could not only provide extra space for buffering the volumetric change during the continuous charging–discharging but also improve the whole conductivity of the Fe3O4@C nanocomposite electrode; secondly, the synergistic effects of Fe3O4 and carbon could avoid Fe3O4 direct exposure to the electrolyte and maintain the structural stabilization of Fe3O4@C nanocomposite. It was suggested that the Fe3O4@C nanocomposite could be suitable as an alternative anode for lithium-ion batteries with a high application potential.