Hyperfine fields at the Li site in LiFePO4-type olivine materials for lithium rechargeable batteries: A 7Li MAS NMR and SQUID study

Hyperfine fields at the Li site in LiFePO4-type olivine materials for lithium rechargeable batteries: A 7Li MAS NMR and SQUID study

TitleHyperfine fields at the Li site in LiFePO4-type olivine materials for lithium rechargeable batteries: A 7Li MAS NMR and SQUID study
Publication TypeJournal Article
Year of Publication2002
AuthorsMichael C Tucker, Marca M Doeff, Thomas J Richardson, Rita Fiñones, Elton J Cairns, Jeffrey A Reimer
JournalJournal of the American Chemical Society
Volume124
3832
Issue15
Pagination3832-3833
Date Published04/2002
Abstract

The 7Li NMR isotropic shift for olivine LiMPO4 (M = Fe, Mn, Co, Ni) is assigned to hyperfine coupling between the 7Li nucleus and the transition metal unpaired electrons on the basis of the Curie−Weiss temperature dependence of the shift. The hyperfine shift arises from a linear combination of Li−O−M through-bond interactions wherein the unpaired A‘ electrons contribute a negative shift and the unpaired A‘ ‘ electrons contribute a positive shift. The hyperfine coupling constant is determined for each composition.

DOI10.1021/ja017838m
Refereed DesignationRefereed