LiFePO4/C composite cathode material with a continuous porous carbon network for high power lithium-ion battery |
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| Authors: | Min YangQiuming Gao |
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| Affiliation: | a State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, PR China
b School of Chemistry and Environment, Beihang University, 37 Xueyuan Road, Beijing 100191, PR China |
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| Abstract: | A series of LiFePO4/porous carbon composites with different LiFePO4 loading amounts were prepared by impregnation from ethanol solution of the LiFePO4 precursors. The samples were characterized using X-ray powder diffraction (XRD), thermogravimetry (TG), differential scanning calorimetric (DSC), transmission electron microscopy (TEM) and nitrogen sorption prior to the electrochemical testing. The size and morphology of the porous carbon supported LiFePO4 nanoparticles depended strongly on the LiFePO4 loading amounts. The impact of LiFePO4 loading on the electrochemical performance of the composites was discussed in detail. Among all the samples, the LiFePO4/microporous carbon composites with the LiFePO4 loading amount of 19.10 wt.% and 35.58 wt.%, respectively, demonstrated high rate performance with discharge capacity of 60 mAh g−1 and 66 mAh g−1 at 50 C. |
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| Keywords: | Lithium iron phosphate Porous carbon network Cathode material Power capability Lithium-ion battery |
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