Identifying the distribution of Al3+ in LiNi0.8Co0.15Al0.05O2

Nicole M. Trease, Ieuan D. Seymour, Maxwell D. Radin, Hao Liu, Haodong Liu, Sunny Hy, Natalya Chernova, Pritesh Parikh, Arun Devaraj, Kamila M. Wiaderek, Peter J. Chupas, Karena W. Chapman, M. Stanley Whittingham, Ying Shirley Meng*, Anton Van Der Van, Clare P. Grey

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)


The doping of Al into layered Li transition metal (TM) oxide cathode materials, LiTMO2, is known to improve the structural and thermal stability, although the origin of the enhanced properties is not well understood. The effect of aluminum doping on layer stabilization has been investigated using a combination of techniques to measure the aluminum distribution in layered LiNi0.8Co0.15Al0.05O2 (NCA) over multiple length scales with 27Al and 7Li MAS NMR, local electrode atom probe (APT) tomography, X-ray and neutron diffraction, DFT, and SQUID magnetic susceptibility measurements. APT ion maps show a homogeneous distribution of Ni, Co, Al, and O2 throughout the structure at the single particle level in agreement with the high-temperature phase diagram. 7Li and 27Al NMR indicates that the Ni3+ ions undergo a dynamic Jahn-Teller (JT) distortion. 27Al NMR spectra indicate that the Al reduces the strain associated with the JT distortion, by preferential electronic ordering of the JT lengthened bonds directed toward the Al3+ ion. The ability to understand the complex atomic and orbital ordering around Al3+ demonstrated in the current method will be useful for studying the local environment of Al3+ in a range of transition metal oxide battery materials.

Original languageEnglish
Pages (from-to)8170-8180
Number of pages11
JournalChemistry of Materials
Issue number22
Early online date31 Oct 2016
Publication statusPublished - 22 Nov 2016


Dive into the research topics of 'Identifying the distribution of Al3+ in LiNi0.8Co0.15Al0.05O2'. Together they form a unique fingerprint.

Cite this