Influences of Fe Element on the Structural and Electrochemical Performances of LiNi_0.5Co_0.2Mn_0.3O₂ Cathode Materials

Abstract

The effect of Fe element on the structural and electrochemical performance of the Layered LiNi_0.5Co_0.2Mn_0.3O₂ materials with various Fe-doped amounts synthesized by high-temperature solid state method had been studied quantitatively and in detail. The structural and morphological of the prepared samples were characterized by X-ray diffraction patterns (XRD) and scanning electron microscopy (SEM). The study results show that the discharge capacity and cycling performance of the LiNi_0.5Co_0.2Mn_0.3O₂ all reduced by Fe doping, that is mainly attributed to the aggravated disorder degree of the layered structure and charge transfer resistance. Fe content should be controlled strictly in the layered LiNi_1−x−yCo_xMn_yO₂ cathode materials production process.

Keywords:

• LiNi_0.5Co_0.2Mn_0.3O₂
• cathode materials
• Fe-doped
• electrochemical performance