Electrochemical performance of LiNi(0.4)Co(0.2)Mn(0.4)o(2) prepared by different molten salt flux: LiNO3-LiCl and LiNO3-KNO3

摘要

Lini(0.4)Co(0.2)Mn(0.4)O(2) material synthesized at different temperatures by using LiNO3-LiCl and LiNO3-KNO3 molten salt as a reaction medium. The phase purity of the samples obtained by powder X-ray diffraction measurement which suggests layered alpha-NaFeO2 type is obtained at 800-900 degrees C using LiNO3-LiCl flux and at 750-850 degrees C using LiNO3-KNO3 flux. The surface morphology change with flux media at different temperature are obtained by scanning electron microscopy analysis. The galvanostatic cycling results show that the high stable reversible discharge capacity of 155 (3) mAh g(-1) obtained for treated compound at 900 degrees C for 1 h (using LiNO3-LiCl) with coloumbic efficiency of 99%. The reversible discharge capacity of 140 and 130 (13) mAh g-1 obtained for treated compound at 750 and 850 degrees C, respectively (using LiNO3-KNO3). (C) 2017 Published by Elsevier B.V.