Manara - Qatar Research Repository
Browse
1/1
2 files

Impact of surface coating on electrochemical and thermal behaviors of a Li-rich Li1.2Ni0.16Mn0.56Co0.08O2 cathode

journal contribution
submitted on 2024-07-01, 09:15 and posted on 2024-07-01, 09:55 authored by Umair Nisar, Ramesh Petla, Sara Ahmad Jassim Al-Hail, Aisha Abdul Quddus, Haya Monawwar, Dr. Abdul ShakoorDr. Abdul Shakoor, Rachid Essehli, Ruhul Amin

Lithium-rich layered oxide materials are considered as potential cathode materials for future high-performance lithium-ion batteries (LIBs) owing to their high operating voltage and relatively high specific capacity. However, perceptible issues such as poor rate performance, poor capacity retention, and voltage degradation during cycling need to be improved before the successful commercialization of the material. In this report, zirconia coated Li1.2Ni0.16Mn0.56Co0.08O2 (NMC) (where ZrO2 = 1.0, 1.5 and 2.0 wt%) materials are synthesized using a sol–gel assisted ball milling approach. A comparison of structural, morphological and electrochemical properties is examined to elucidate the promising role of ZrO2 coating on the performance of the NMC cathode. A uniform and homogeneous ZrO2 coating is observed on the surface of NMC particles as evident by TEM elemental mapping images. The ZrO2 coated NMCs exhibit significantly improved electrochemical performance at a higher C-rate as compared to pristine material. 1.5% ZrO2 coated NMC demonstrates better cycling stability (95% capacity retention) than pristine NMC (77% capacity retention) after 50 cycles. All ZrO2 coated NMC materials demonstrated improved thermal stability compared to pristine material. The difference in onset temperature of 2 wt% ZrO2 coated and pristine NMC is 20 °C. The improved electrochemical performance of ZrO2 coated NMC can be attributed to the stabilization of its surface structure due to the presence of ZrO2.

Other Information

Published in: RSC Advances
License: In Copyright
See article on publisher's website: http://dx.doi.org/10.1039/d0ra02060e

Funding

Qatar National Research Fund (NPRP11S-1225-170128), Optimization of high voltage cathodes and electrolytes of lithium ion batteries for grid applications in Qatar climate conditions.

History

Language

  • English

Publisher

Royal Society of Chemistry

Publication Year

  • 2020

License statement

This Item is licensed under the Creative Commons Attribution 3.0 International License.

Institution affiliated with

  • Hamad Bin Khalifa University
  • Qatar Environment and Energy Research Institute - HBKU
  • Qatar University
  • College of Engineering - QU