能源化学(英文) ›› 2013, Vol. 22 ›› Issue (2): 329-335.

• Articles • 上一篇    下一篇

Ammonia-treatment assisted fully encapsulation of Fe2O3 nanoparticles in mesoporous carbons as stable anodes for lithium ion batteries

Fei Han, Wen-Cui Li, Duo Li, An-Hui Lu   

  1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China
  • 收稿日期:2012-10-27 修回日期:2012-12-29 出版日期:2013-03-20 发布日期:2013-04-04
  • 通讯作者: An-Hui Lu
  • 基金资助:
    This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. DUT12ZD218), the National Natural Science Foundation of China (Grant No. 21103184), and the Ph. D. Programs Foundation (Grant No. 20100041110017) of Ministry of Education of China.

Ammonia-treatment assisted fully encapsulation of Fe2O3 nanoparticles in mesoporous carbons as stable anodes for lithium ion batteries

Fei Han, Wen-Cui Li, Duo Li, An-Hui Lu   

  1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2012-10-27 Revised:2012-12-29 Online:2013-03-20 Published:2013-04-04
  • Supported by:
    This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. DUT12ZD218), the National Natural Science Foundation of China (Grant No. 21103184), and the Ph. D. Programs Foundation (Grant No. 20100041110017) of Ministry of Education of China.

摘要: To improve the initial coulombic efficiency and bulk density of ordered mesoporous carbons, active Fe2O3 nanoparticles were introduced into tubular mesopore channels of CMK-5 carbon, which possesses high specific surface area (>1700 m2-1) and large pore volume (>1.8 cm3-1). Fine Fe2O3 nanoparticles with sizes in the range of 5-7 nm were highly and homogenously encapsulated into CMK-5 matrix through ammonia-treatment and subsequent pyrolysis method. The Fe2O3 loading was carefully tailored and designed to warrant a high Fe2O3 content and adequate buffer space for improving the electrochemical performance. In particular, such Fe2O3 and mesoporous carbon composite with 47 wt% loading exhibits a considerably stable cycle performance (683 mAh穏-1 after 100 cycles, 99% capacity retention against that of the second cycle) as well as good rate capability. The fabrication strategy can effectively solve the drawback of single material, and achieve a high-performance lithium electrode material.

关键词: ordered mesoporous carbon, Fe2O3 nanoparticle, cycle stability, lithium-ion anode

Abstract: To improve the initial coulombic efficiency and bulk density of ordered mesoporous carbons, active Fe2O3 nanoparticles were introduced into tubular mesopore channels of CMK-5 carbon, which possesses high specific surface area (>1700 m2-1) and large pore volume (>1.8 cm3-1). Fine Fe2O3 nanoparticles with sizes in the range of 5-7 nm were highly and homogenously encapsulated into CMK-5 matrix through ammonia-treatment and subsequent pyrolysis method. The Fe2O3 loading was carefully tailored and designed to warrant a high Fe2O3 content and adequate buffer space for improving the electrochemical performance. In particular, such Fe2O3 and mesoporous carbon composite with 47 wt% loading exhibits a considerably stable cycle performance (683 mAh穏-1 after 100 cycles, 99% capacity retention against that of the second cycle) as well as good rate capability. The fabrication strategy can effectively solve the drawback of single material, and achieve a high-performance lithium electrode material.

Key words: ordered mesoporous carbon, Fe2O3 nanoparticle, cycle stability, lithium-ion anode