THE STUDY ON SYNTHESIS AND MODIFICATION FOR IRON PHOSPHATE

被引：14
|
作者：
Yang, X. [1 ]
Zhang, S. M. [1 ]
Zhang, J. X. [1 ]
Xu, M. Y. [1 ]
Ren, P. [1 ]
Li, X. C. [1 ]
Yan, L. C. [2 ]
机构：
[1] Shanghai Univ Elect Power, Electrochem Res Grp, Shanghai 200090, Peoples R China
[2] Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China
来源：
FUNCTIONAL MATERIALS LETTERS | 2011年 / 4卷 / 04期
关键词：
Iron phosphate; cathode materials; homogeneous co-precipitation; doping; properties; ELECTROCHEMICAL PERFORMANCE; CATHODE MATERIAL; LITHIUM; ELECTRODE; FEPO4;
D O I：
10.1142/S1793604711002226
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to improve the electrochemical performance of FePO4, the method of Cr3+ ion-doped FePO4 was proposed in this paper. FePO4 and doped Fe1-xCrxPO4 (x = 0.02, 0.04, 0.06 and 0.08) were prepared by homogeneous co-precipitation followed by spray drying method, and then the samples were sintered at different temperatures (380 degrees C, 460 degrees C, 550 degrees C and 650 degrees C). Physical-chemical properties were characterized by using thermogravimetric analysis (TG), X-ray diffraction (XRD) and scanning electron microscope (SEM); electrochemical behavior of the samples were analyzed using charge-discharge test, electrochemical impedance spectroscopy (EIS). The results indicated that the Cr3+ doping can effectively improve the electrochemical performance of FePO4. Fe0.96Cr0.04PO4 sintered at 460 degrees C showed the highest specific capacity of 109.7 mAh/g for the 1st cycle at 0.05 C. In addition, the doping mechanism for FePO4 was discussed in this paper.
引用
收藏
页码：323 / 326
页数：4
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