Please use this identifier to cite or link to this item:
|Title:||Influence of Ru substitution on Li-rich 0.55Li 2MnO 3·0.45LiNi 1/3Co 1/3Mn 1/3O 2 cathode for Li-ion batteries|
Li(Li 0.2Mn 0.54Ni 0.13Co 0.13)O 2
|Source:||Song, B., Lai, M.O., Lu, L. (2012-10-01). Influence of Ru substitution on Li-rich 0.55Li 2MnO 3·0.45LiNi 1/3Co 1/3Mn 1/3O 2 cathode for Li-ion batteries. Electrochimica Acta 80 : 187-195. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2012.06.118|
|Abstract:||Li-rich cathode 0.55Li 2MnO 3·0.45LiNi 1/3Co 1/3Mn 1/3O 2 or written in a solid solution form Li(Li 0.20Mn 0.54Ni 0.13Co 0.13)O 2 doped with trace Ru is synthesized using a traditional co-precipitation method. The structural and morphological characterizations are carried out by employing inductively coupled plasma emission spectrometry (ICP), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Ru doping causes variation of lattice constants in both Li 2MnO 3 and LiNi 1/3Co 1/3Mn 1/3O 2 components according to the results of Rietveld refinement. Electrochemical measurement shows that Li(Li 0.19Mn 0.54Ni 0.13Co 0.12Ru 0.01)O 2 possesses the best performance, especially at high rate. A discharge capacity as high as 182 mAh g -1 at a current density of 500 mA g -1 (2 C) is achieved with a capacity fade of as low as 0.06% per cycle in the following 700 cycles. Such improvement is associated with the prominent appearance of spinel-like regions transferred from the original Li 2MnO 3 component in which Ru facilitates the phase transformation via enhancing the ability of Li diffusion in both Li 2MnO 3 and LiNi 1/3Co 1/3Mn 1/3O 2 components. The improvement in Li diffusion is also confirmed from the electrochemical impedance spectroscopy (EIS) analysis. © 2012 Elsevier Ltd.|
|Source Title:||Electrochimica Acta|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 19, 2018
WEB OF SCIENCETM
checked on Feb 7, 2018
checked on Feb 20, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.