Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7734316 | Journal of Power Sources | 2015 | 9 Pages |
Abstract
The xLi2MnO3·(1âx)Li(Mn0.33Co0.33Ni0.33)O2 (x = 0.3, 0.5, 0.7) cathode material with uniform spherical morphology has been successfully prepared by a facile carbonate co-precipitation method. These cathode materials are characterized by X-ray powder diffractometry (XRD), scanning electron microscopy (SEM), and inductively coupled plasma emission spectrometry (ICP-AES). The electrochemical properties of these cathode materials have been studied by charge/discharge cycling at various current rates. The results of these studies suggest that among these materials, the composite cathode with x = 0.5 (Li1.2Mn0.54Co0.13Ni0.13O2) exhibiting the better electrochemistry performances than those with x = 0.3 and 0.7. Correspondingly, 2 wt% CuO-coated Li1.2Mn0.54Co0.13Ni0.13O2 possess better cycling stability (173.9 mAh gâ1 after 50 cycles at 1C rate and 50 cycles at 2C rate) and rate capability than the pristine one. Meanwhile, the CuO-coating layer of the material has a contribution to improve its thermal stability. We believe it is a promising cathode for the high energy lithium batteries.
Keywords
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Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Bing Li, Yangyang Yu, Jinbao Zhao,