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Effect of Precursor Drying Process on the Properties of LiFePO_4/C Composite with Low Carbon Content
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作者 方桂煌 吴茂祥 +2 位作者 王文国 李仁富 潘荧 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第2期273-281,共9页
Properties of two LiFePO4/C composites with low carbon content synthesized from precursors dried by spray drying and blast drying are investigated by scanning electron microscopy, X-ray diffraction, Raman spectroscopy... Properties of two LiFePO4/C composites with low carbon content synthesized from precursors dried by spray drying and blast drying are investigated by scanning electron microscopy, X-ray diffraction, Raman spectroscopy and electrochemical measurements. The two samples have a different morphology and particle size, while the structure of LiFePO4 is unaffected. The LiFePO4/C composite prepared from the precursor dried by blast drying has a much lower surface resistance and a much better rate capability because the deposited carbon is more graphite-like and more conductive. The cycling performance is also much better for the LiFePO4/C composite prepared from the precursor dried by blast drying because only a slight impedance growth is involved upon cycling. These results suggest that the precursor drying process has a significant impact on the properties of LiFePO4/C composite, and its effect is highly dependent on the carbon content. 展开更多
关键词 lithium ion batteries cathode LIFEPO4 PRECURSOR DRYING
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