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

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
• Public URL: https://durham-repository.worktribe.com/output/1286501