Enhancing electrochemical performance of LiFePO4/C via coaxial electrospinning method
首发时间:2016-03-18
Abstract:In this work, LiFePO4/C (LFP/C) cathode materials with superior electrochemical performance have been prepared by coaxial and uniaxial electrospinning methods. The electrode materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Also, cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS) measurements were performed on these materials. The experimental results indicate that the electrochemical properties of LFP/C-C, such as specific capacity, coulombic efficiency, Li+ diffusion coefficient and overpotential are significantly improved. The enhanced electrical conductivity and polarization of the LFP/C-C electrode is mainly due to its porous morphology and amorphous carbon coating layer.
keywords: LiFePO4/C electrospinning porous structure
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同轴静电纺丝法提高了LiFePO4/C正极材料的电化学性能
摘要:本文通过同轴和单轴静电纺丝法制备的LiFePO4/C (LFP/C)正极材料具有卓越的电化学性能。通过X射线衍射(XRD),扫描电子显微镜(SEM)和透射电子显微镜(TEM)对电极材料进行了表征。并且,用循环伏安(CV),恒电流充放电,和电化学交流阻抗(EIS)对这些材料进行了测试。实验结果表明,同轴静电纺丝得到的正极材料(LFP/C-C)的电化学性能,比如其比容量,库伦效率,Li+的扩散系数和超电势被显著改善。以及,正极材料(LFP/C-C)电极的电导率和极化程度得到有效改善是由于其多孔的形态和无定形碳涂层。
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No.4680762534661145****
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