能源化学(英文版)

能源化学(英文) ›› 2014, Vol. 23 ›› Issue (3): 354-357.DOI: 10.1016/S2095-4956(14)60157-1

• ARTICLES • 上一篇    下一篇

Preparation of polypyrrole-coated CuFe2O4 and their improved electrochemical performance as lithium-ion anodes

Huayun Xua, Yunpo Wanga, Long Zhenga, Xinhui Duana, Lihui Wanga, Jian Yanga, Yitai Qiana,b   

  1. a. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China;
    b. Hefei National Laboratory for Physical Science at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, China
  • 收稿日期:2013-10-31 修回日期:2013-12-31 出版日期:2014-05-24 发布日期:2014-05-25
  • 通讯作者: Yitai Qian
  • 基金资助:

    This work was supported by the 973 Project of China (No. 2011CB935901) and the National Nature Science Foundations of China (No. 21203111, 91022033).

Preparation of polypyrrole-coated CuFe2O4 and their improved electrochemical performance as lithium-ion anodes

Huayun Xua, Yunpo Wanga, Long Zhenga, Xinhui Duana, Lihui Wanga, Jian Yanga, Yitai Qiana,b   

  1. a. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China;
    b. Hefei National Laboratory for Physical Science at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, Anhui, China
  • Received:2013-10-31 Revised:2013-12-31 Online:2014-05-24 Published:2014-05-25
  • Supported by:

    This work was supported by the 973 Project of China (No. 2011CB935901) and the National Nature Science Foundations of China (No. 21203111, 91022033).

摘要： CuFe2O4 network, prepared via the electrostatic spray deposition technique, with high reversible capacity and long cycle lifetime for lithium ion battery anode material has been reported. The reversible capacity can be further enhanced by coating high electronic conductive polypyrrole (PPy). At the current density of 100 mA·g-1, Li/CuFe2O4 electrode delivers a reversible capacity of 842.9 mAh·g-1 while the reversible capacity of Li/PPy-coated CuFe2O4 electrode increases up to 1106.7 mAh·g-1. A high capacity of 640.7 mAh·g-1 for the Li/PPy-coated CuFe2O4 electrode is maintained in contrast of 398.9 mAh·g-1 for Li/CuFe2O4 electrode after 60 cycles, which demonstrates good electrochemical performance of the composite due to the increase of electronic conductivity. The electrochemical impedance spectroscopy (EIS) further reveals that the Li/PPy-coated CuFe2O4 electrode has a lower charge transfer resistance than the Li/CuFe2O4 electrode.

关键词: CuFe2O4, polypyrrole-coated, electrostatic spray deposition, lithium ion batteries

Abstract: CuFe2O4 network, prepared via the electrostatic spray deposition technique, with high reversible capacity and long cycle lifetime for lithium ion battery anode material has been reported. The reversible capacity can be further enhanced by coating high electronic conductive polypyrrole (PPy). At the current density of 100 mA·g-1, Li/CuFe2O4 electrode delivers a reversible capacity of 842.9 mAh·g-1 while the reversible capacity of Li/PPy-coated CuFe2O4 electrode increases up to 1106.7 mAh·g-1. A high capacity of 640.7 mAh·g-1 for the Li/PPy-coated CuFe2O4 electrode is maintained in contrast of 398.9 mAh·g-1 for Li/CuFe2O4 electrode after 60 cycles, which demonstrates good electrochemical performance of the composite due to the increase of electronic conductivity. The electrochemical impedance spectroscopy (EIS) further reveals that the Li/PPy-coated CuFe2O4 electrode has a lower charge transfer resistance than the Li/CuFe2O4 electrode.

Key words: CuFe2O4, polypyrrole-coated, electrostatic spray deposition, lithium ion batteries