抄録
LiFePO4 particles were prepared by the solid state reaction, and coated with conducting carbon layer through the hydrocarbon gas decomposition technique. The uniformity of the carbon layer was examined using the small angle X-ray diffraction with the core shell model. The half cell using these composite particles as cathode exhibited a peculiarity, that is, the capacity increment during the initial cycling process. In this study, the initial cycling process was studied with the AC impedance method. As a result, it was found that the interfacial impedance becomes small on the cycling sequence. It implies that the cathode/electrolyte interface is built on the initial cycling.
