| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 236628 | Powder Technology | 2013 | 5 Pages |
The cathode material xLi2MnO3·(1 − x)LiMn0.5Ni0.4Co0.1O2 was synthesized via a spray drying followed by solid-state calcination. The properties of the layered oxide cathodes for x = 0.3, 0.5, 0.7 have been investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), galvanostatic cell cycling, as well as Ac impedance spectroscopy. The results indicate that, when x = 0.3, the layered oxide cathode shows the best charge–discharge performances of low current density. Between 2.5 and 4.8 V (vs. Li/Li +), the initial discharge capacities of 0.3Li2MnO3·0.7LiMn0.5Ni0.4Co0.1O2 are 238, 229 and 206 mAhg− 1 at a constant current density of 12.5, 25 and 50 mAg− 1, respectively. The electrode composition 0.7Li2MnO3·0.3LiMn0.5Ni0.4Co0.1O2 displays the best performance at high charge–discharge rate. The initial discharge capacity of 0.7Li2MnO3·0.3LiMn0.5Ni0.4Co0.1O2 is 135 mAhg− 1 at 250 mAg− 1, after 50 cycles, the discharge capacities of the layered oxide cathode remains 85%.
Graphical abstractThe cathode material xLi2MnO3·(1 − x)LiMn0.5Ni0.4Co0.1O2 was prepared by spray drying and subsequent calcination. Although increase of Li2MnO3 component results in the reduction of discharge capacity, it shows better rate capacity and stability at high current density. It indicates that selecting an appropriate x value of xLi2MnO3·(1 − x)LiMO2 is very important for the application of this cathode material.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The precursor powders have been synthesized by a simple method. ► The xLi2MnO3·(1 − x)LiMn0.5Ni0.4Co0.1O2 particles with submicron size. ► The cathode material shows excellent electrochemical performance. ► The performance makes this material attractive for large applications.
