Preparation and Electrochemical Performance of LiFePO4/C Composite

Jun Qin Fan; Jian Guo Yu; Yong Nan Zhao; Chao Yang Liu; Guo Qing Sheng; Jiao Wu

doi:10.4028/www.scientific.net/AMR.805-806.1265

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 805-806Preparation and Electrochemical Performance of...

Preparation and Electrochemical Performance of LiFePO₄/C Composite

Abstract:

LiFePO₄/C composites were synthesized by pyrolyzation of starch gel containing FeC₂O₄, Li₂CO₃ and NH₄H₂PO₄. The crystalline structures, micro-morphologies and electrochemical performances of LiFePO₄/C composites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and galvanostatic charge-discharge, respectively. The results indicated that the LiFePO₄ nanoparticles showed the homogeneous particle size distribution and were bound together by carbon network when carbon content was 3.9wt%. Moreover, this sample exhibited the highest initial discharge capacity of 154.8 mAh·g^-1 at 0.15 C rate, excellent cyclic ability and rate capability about 99.6 mAh·g^-1 applied 5 C rate in the 20th cycle at room temperature.

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Periodical:

Advanced Materials Research (Volumes 805-806)

Pages:

1265-1268

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.805-806.1265

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Online since:

September 2013

Authors:

Jun Qin Fan*, Jian Guo Yu, Yong Nan Zhao, Chao Yang Liu, Guo Qing Sheng, Jiao Wu

Keywords:

LiFePO₄/C Composite, Rate Capability, Starch

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