title: Fast lithium ion diffusion in the ternary layered nitridometalate LiNiN.
abstract: The structure, Li+ diffusion dynamics, and magnetic properties of the layered nitridonickelate(II), LiNiN, have been investigated by powder X-ray diffraction, 7Li solid-state NMR, and SQUID magnetometry and compared and contrasted with those of the Li+ fast ion conductor, Li3N. The replacement of Li+ by Ni2+ with concomitant generation of Li+ vacancies has profound effects on ionic diffusion and electronic properties. The nitridonickelate, akin to its binary parent, displays rapid Li+ ion diffusion but, by contrast, the diffusion process is confined only to the Li-N planes. Further, replacement of Li by Ni leads to a transition from semiconducting to metallic behavior, likely mediated through the creation of infinite, 1D Ni-N chains of increased covalency.
authors.affiliation: School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K.
authors.forename: Zlatka
authors.initials: Z
authors.lastname: Stoeva
authors.forename: Ruben
authors.initials: R
authors.lastname: Gomez
authors.forename: Alexandra G
authors.initials: AG
authors.lastname: Gordon
authors.forename: Mark
authors.initials: M
authors.lastname: Allan
authors.forename: Duncan H
authors.initials: DH
authors.lastname: Gregory
authors.forename: Gary B
authors.initials: GB
authors.lastname: Hix
authors.forename: Jeremy J
authors.initials: JJ
authors.lastname: Titman