高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (3): 630.

• 研究论文 • 上一篇    下一篇

中空Fe2O3/GNS纳米复合材料的制备和储锂性能

邹琼,宰建陶,刘萍,钱雪峰   

  1. 上海交通大学化学化工学院, 金属基复合材料国家重点实验室, 上海 200240
  • 收稿日期:2010-10-15 修回日期:2010-12-21 出版日期:2011-03-10 发布日期:2011-02-23
  • 通讯作者: 钱雪峰;刘萍 E-mail:xfqian@sjtu.edu.cn;liupingsjj@sjtu.edu.cn
  • 基金资助:

    国家“九七三”计划项目(批准号: 2009CB930400, 2007CB209705)、国家自然科学基金(批准号: 21071097)和高性能陶瓷和超微结构国家重点实验室开放课题基金(批准号: SKL200901SIC)资助.

Synthesis and Lithium Storage Properties of Hollow Fe2O3/Graphene Nanocomposites

ZOU Qiong, ZAI Jian-Tao, LIU Ping*, QIAN Xue-Feng*   

  1. National Key Laboratory of Metallic Matrix Composite Material, School of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2010-10-15 Revised:2010-12-21 Online:2011-03-10 Published:2011-02-23
  • Contact: QIAN Xue-Feng;LIU Ping E-mail:xfqian@sjtu.edu.cn;liupingsjj@sjtu.edu.cn
  • Supported by:

    国家“九七三”计划项目(批准号: 2009CB930400, 2007CB209705)、国家自然科学基金(批准号: 21071097)和高性能陶瓷和超微结构国家重点实验室开放课题基金(批准号: SKL200901SIC)资助.

摘要: 本文以三氯化铁、氧化石墨烯(GO)为原料,采用水热法一步合成了中空Fe2O3/石墨烯(GNS)纳米复合材料. 研究表明Fe2O3/GNS纳米复合材料的形成是由于Fe3+催化氧化GO中的羧基等官能团释放出CO2,原位形成的CO2气泡为中空结构Fe2O3的形成提供了模板;同时GO失去了羧基等官能团形成了石墨烯,进而与中空Fe2O3材料进行原位复合. 电化学储锂性能测试表明复合材料在较高的电流密度(200 mA g-1和400 mA g-1)下循环50周之后仍具有良好的储锂性能(520 mAh g-1和437 mAh g-1).  

关键词: Fe2O3/GNS纳米复合材料, 锂离子电池, 水热法, 中空材料

Abstract: Hollow Fe2O3/Graphene nanocomposites were synthesized by a hydrothermal method, and they were characterized by XRD and SEM. A plausible formation mechanism of the composite could be based on the catalytic oxidation of carboxyl et. al. groups of GO in the presence of Fe3+ ions to form GNS, and the released CO2 provided templates for the formation of hollow Fe2O3, and then hollow Fe2O3/Graphene nanocomposites were formed in-situ. The obtained nanocomposites show excellent Li storage performances. After 50 cycles, a capacity of 520 mAh g-1 (437 mAh g-1) was kept at a high current density of 200 mA g-1 (400 mA g-1).

Key words: Fe2O3/GNS nanocomposite, Lithium-ion battery, Hydrothermal, Hollow materials

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