Jump to main content
Jump to site search


Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides

Author affiliations

Abstract

Nickel-rich layered transition metal oxides (NMCs) have been intensively studied as promising cathode candidates for next-generation Li-ion batteries, known for low cost and high theoretical capacity. However, the practical capacity of NMCs is largely determined by cationic ordering and has yet to be well controlled during synthesis, largely due to the complexity and non-equilibrium nature of the reactions occurring in the sintering process. In this work, high-energy synchrotron X-ray diffraction is employed to investigate the kinetic and thermodynamic aspects of cationic ordering during synthesis of LiNi0.7Mn0.15Co0.15O2 (NMC71515). It is found that cationic ordering in the bulk is coupled to surface reconstruction during synthesis, occurring concomitantly and both being greatly affected by Li2CO3 decomposition and Li loss at the particle surface. Through tuning the sintering temperature and time, highly ordered NMC71515 with high capacity and excellent rate capability is synthesized. The developed approach may be applied broadly to the synthesis of high-performance Ni-rich NMC and other cathode materials.

Graphical abstract: Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 Nov 2018, accepted on 03 Dec 2018 and first published on 04 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA10553G
Citation: J. Mater. Chem. A, 2019, Advance Article
  •   Request permissions

    Insights into Li/Ni ordering and surface reconstruction during synthesis of Ni-rich layered oxides

    Y. Duan, L. Yang, M. Zhang, Z. Chen, J. Bai, K. Amine, F. Pan and F. Wang, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA10553G

Search articles by author

Spotlight

Advertisements