Evaluating lithium diffusion mechanisms in the complex spinel Li2NiGe3O8

Martin, Daniel Z.C.; Haworth, Abby R.; Schmidt, Whitney L.; Baker, Peter J.; Boston, Rebecca; Johnston, Karen E.; Reeves-McLaren, Nik

doi:10.1039/c9cp02907a

Evaluating lithium diffusion mechanisms in the complex spinel Li2NiGe3O8

Martin, Daniel Z.C.; Haworth, Abby R.; Schmidt, Whitney L.; Baker, Peter J.; Boston, Rebecca; Johnston, Karen E.; Reeves-McLaren, Nik

Authors

Daniel Z.C. Martin

Abby R. Haworth

Whitney L. Schmidt

Peter J. Baker

Rebecca Boston

Dr Karen Johnston karen.johnston@durham.ac.uk
Associate Professor

Nik Reeves-McLaren

Abstract

Lithium-ion diffusion mechanisms in the complex spinel Li2NiGe3O8 have been investigated using solid-state NMR, impedance, and muon spectroscopies. Partial occupancy of migratory interstitial 12d sites is shown to occur at lower temperatures than previously reported. Bulk activation energies for Li+ ion hopping range from 0.43 ± 0.03 eV for powdered samples to 0.53 ± 0.01 eV for samples sintered at 950 °C for 24 h, due to the loss of Li during sintering at elevated temperatures. A lithium diffusion coefficient of 3.89 × 10−12 cm2 s−1 was calculated from muon spectroscopy data for Li2NiGe3O8 at 300 K.

Citation

Martin, D. Z., Haworth, A. R., Schmidt, W. L., Baker, P. J., Boston, R., Johnston, K. E., & Reeves-McLaren, N. (2019). Evaluating lithium diffusion mechanisms in the complex spinel Li2NiGe3O8. Physical Chemistry Chemical Physics, 41(21), https://doi.org/10.1039/c9cp02907a

Journal Article Type	Article
Acceptance Date	Aug 28, 2019
Online Publication Date	Oct 11, 2019
Publication Date	Nov 7, 2019
Deposit Date	Sep 16, 2019
Publicly Available Date	Oct 25, 2019
Journal	Physical Chemistry Chemical Physics
Print ISSN	1463-9076
Electronic ISSN	1463-9084
Publisher	Royal Society of Chemistry
Peer Reviewed	Peer Reviewed
Volume	41
Issue	21
DOI	https://doi.org/10.1039/c9cp02907a