Short-range ordering in a battery electrode, the 'cation-disordered' rocksalt Li1.25Nb0.25Mn0.5O2

Michael A Jones; Philip J Reeves; Ieuan D Seymour; Matthew J Cliffe; Siân E Dutton; Clare P Grey

doi:10.1039/c9cc04250d

Short-range ordering in a battery electrode, the 'cation-disordered' rocksalt Li_1.25Nb_0.25Mn_0.5O₂

Chem Commun (Camb). 2019 Aug 7;55(61):9027-9030. doi: 10.1039/c9cc04250d. Epub 2019 Jul 10.

Authors

Michael A Jones¹, Philip J Reeves¹, Ieuan D Seymour¹, Matthew J Cliffe², Siân E Dutton³, Clare P Grey¹

Affiliations

¹ Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK. cpg27@cam.ac.uk.
² School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
³ Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK. sed33@cam.ac.uk.

PMID: 31290883
DOI: 10.1039/c9cc04250d

Abstract

Cation order, with a local structure related to γ-LiFeO₂, is observed in the nominally cation-disordered Li-excess rocksalt Li_1.25Nb_0.25Mn_0.5O₂via X-ray diffraction, neutron pair distribution function analysis, magnetic susceptibility and NMR spectroscopy. The correlation length of ordering depends on synthesis conditions and has implications for the electrochemistry of these phases.