Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.



Surface modification of Li−rich manganese−based cathode materials by chemical etching

Abstract

Lithium−rich layered oxides are attractive high−energy cathode materials for lithium−ion batteries but suffer from structural instability that incurs voltage fading, capacity loss, and poor kinetics. Here we report the synthesis of Li1.2Mn0.52Co0.13Ni0.13O2 (LMCN) through co−precipitation method and the performance improvement of LMCN with ceric ammonium nitrate (CAN) etching. Combining X−ray diffraction, scanning electron microscope and X−ray photoelectron spectroscopy reveals that chemical etching modifies the surface composition and generates a thin amorphous layer, which mitigates structural collapse and lattice oxygen release. Compared with pristine LMCN, the etched sample exhibits improved capacity retention (from 58.7% to 76.6% after 200 cycles at 1 C) and rate capability (from 125 to 140 mAh g−1 at 5 C). The results suggest that chemical etching is an efficient strategy to enhance Li−rich oxide cathode materials.

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Mar 2019, accepted on 10 May 2019 and first published on 10 May 2019


Article type: Research Article
DOI: 10.1039/C9QI00333A
Inorg. Chem. Front., 2019, Accepted Manuscript

  •   Request permissions

    Surface modification of Li−rich manganese−based cathode materials by chemical etching

    H. Cui, H. Li, J. Liu, Y. Zhang, F. Cheng and J. Chen, Inorg. Chem. Front., 2019, Accepted Manuscript , DOI: 10.1039/C9QI00333A

Search articles by author

Spotlight

Advertisements