Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1520533 | Materials Chemistry and Physics | 2016 | 6 Pages |
Abstract
A porous LiFePO4/C nanocomposite was synthesized by an in situ polymerization restriction method. The obtained product possessed higher surface area and abundant pore structure. The physical and electrochemical properties of the LiFePO4/C composite were investigated by X-ray diffraction, thermogravimetry analysis, nitrogen adsorption-desorption measurement, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy and electrochemical measurements. Electrochemical test indicated that the discharge capacity of LiFePO4/C was as high as 156.1 mAh gâ1 in the first cycle at 0.5C and 145.2 mAh gâ1 after 50 cycles. The initial discharge capacities of the electrodes exhibited 126.3 mAh gâ1, 108.6 mAh gâ1, 82.5 mAh gâ1 and 62.8 mAh gâ1 at the high rates of 5C, 10C, 20C and 50C. The discharge capacity retentions after 500 cycles were 94.4%, 90.6%, 87.8% and 90.9% of the initial discharge capacity at rates of 5C, 10C, 20C and 50C, respectively.
Related Topics
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Authors
Jian Chen, Na Zhao, Guo-Dong Li, Fei-Fan Guo, Xiaofeng Wang, Tiekun Jia, Junwei Zhao, Yinggang Zhao, Xiaolin Wang, Lin Wan,