| Effect of the surface modification of Li1.2Ni0.13Co0.13Mn0.54O2 as cathode material for lithium ion battery |
| Paper ID : 1047-ISCBAS |
| Authors |
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Ashraf El-Sayed Abdel-Ghany * National Research Centre, Inorganic Chemistry Department, Behoes Street, Dokki, Giza 12622, Egypt |
| Abstract |
| The improvement of calendar and cycle life of lithium ion batteries with safety issues require sophisticated technology to prevent degradation mechanisms. The surface modification of the electrode materials is part of the solution. In this paper, the surface coverage of Li-rich Li1.2Ni0.13Co0.13Mn0.54O2 (LLNCMO) cathode material by different sources of metal fluoride are reported. The synthesized samples by sol-gel route before and after coating are well crystallized in the layered structure insure a very good crystallization in the layered structure, probed by XRD, energy-dispersive X-ray (EDX) spectroscopy, and Raman spectroscopy (RS). They have particle sizes of about 250 nm, with high porosity (pore size 5 nm) as determined by BET measurement. The very thing coating layer ~5-nm thick has improved the discharge capacity. This significant improvement is mainly attributed to the pre-activation of the Li-rich layered oxide induced by the coating as confirmed by the analysis from galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). |
| Keywords |
| Li-rich oxide; surface modification; layered structure; cathode; voltage decay; Li-ion batteries. |
| Status: Abstract Accepted (Oral Presentation) |