X射线光电子能谱
材料科学
扫描电子显微镜
介电谱
阴极
纳米复合材料
化学工程
聚吡咯
电化学
粒子(生态学)
聚合
分析化学(期刊)
电极
复合材料
聚合物
化学
有机化学
物理化学
工程类
地质学
海洋学
作者
Andrea Straková Fedorková,Renáta Oriňaková,Andrej Oriňák,Miriam Kupková,Hans‐Dieter Wiemhöfer,Jean‐Nicolas Audinot,J. Guillot
标识
DOI:10.1016/j.solidstatesciences.2012.06.010
摘要
High performance PPy/PEG-LiFePO4 nanocomposites as cathode materials were synthesized by solvothermal method and simple chemical oxidative polymerization of pyrrole (Py) monomer on the surface of LiFePO4 particles. The samples were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectrometry (XPS) and charge-discharge tests. PPyPEG hybrid layers decrease particle to particle contact resistance while the impedance measurements confirmed that the coating of PPy-PEG significantly decreases the charge transfer resistance of the electrode material. The initial discharge capacities of this sample at C/5 and 1C are 150 and 128 mAh/g, respectively. The results show that PPy/PEGLiFePO4 composites are more effective than bare LiFePO4 as cathode material.
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