Electrochemical Performance of LiFe_xNi_0.5-xMn_1.5O₄ Cathode Material for Lithium-Ion Batteries

摘要

High-voltage anode material possess splendid application prospect in lithium ions battery. In this work, the Fe-doped LiFexNi0.5-xMn1.5O4 (x=0-0.5) cathode materials have been synthesized by a solid-state method. The surface morphology and its composition have been characterized by X-ray diffraction, inductively coupled plasma, Field-emission scanning electron microscopy and Energy Dispersive Spectrometer. The physicochemical properties and electrochemical properties of the materials also have been investigated, and show that the as-prepared electrodes exhibit excellent cycling and rate 3+ performance than the LiNi0.5Mn1.5O4 electrodes. It is considered that a little Fe doping suppresses the generation of Mn3+, and creates the charge vacancy, which can enhance the transportation of electron and lithium-ion in LiNi0.5Mn1.5O4, which will guide the development of high-voltage cathode material in the future.