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

• Published in: Journal of energy chemistry Vol. 23; no. 3; pp. 354 - 357
• Main Authors: Xu, Huayun, Wang, Yunpo, Zheng, Long, Duan, Xinhui, Wang, Lihui, Yang, Jian, Qian, Yitai
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.05.2014; Elsevier
• Subjects: Applied sciences; CuFe2O4; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; electrostatic spray deposition; Exact sciences and technology; lithium ion batteries; polypyrrole-coated; 制备; 可逆容量; 电化学性能; 聚吡咯; 被覆; 锂离子电池; 阳极; 马来酸酐接枝; lithium ion batteries; polypyrrole-coated; electrostatic spray deposition; CuFe2O4; Ternary compound; Lithium ion batteries; Anode; Electrode material; Spray coating; Discharge charge cycle; Surface structure; O; Characterization; CuFe; Lithium ion; Electrical characteristic; Scanning electron microscopy; Electrostatic spraying; Secondary cell; X ray diffraction; Coated material; Copper Oxides; Conducting polymers; Iron Oxides; Transmission electron microscopy; Morphology; Preparation; Pyrrole polymer
• ISSN: 2095-4956
• DOI: 10.1016/S2095-4956(14)60157-1

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 100mA·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’.A high capacity of 640.7 mAhg＂1 for the Li/PPy-coated CuFe2O4electrode is maintained in contrast of 398.9 mAh·g-1 for 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/CuFe2C〉4 electrode.