High-Temperature Pulsed-Field-Gradient 7Li-NMR Measurements of Li2CO3 over 700 K

Kenjiro Hashi; Shinobu Ohki; Yuuki Mogami; Atsushi Goto; Tadashi Shimizu

doi:10.2116/analsci.21A001

High-Temperature Pulsed-Field-Gradient ⁷Li-NMR Measurements of Li₂CO₃ over 700 K

Anal Sci. 2021 Oct 10;37(10):1477-1479. doi: 10.2116/analsci.21A001. Epub 2021 Mar 12.

Authors

Kenjiro Hashi¹, Shinobu Ohki¹, Yuuki Mogami¹, Atsushi Goto¹, Tadashi Shimizu¹

Affiliation

¹ National Institute for Materials Science, 3-13 Sakura Tsukuba, Ibaraki, 305-0003, Japan.

PMID: 33716260
DOI: 10.2116/analsci.21A001

Abstract

Understanding the transport property of Li ions is crucial for improving the performance of Li-ion batteries. To investigate the ion diffusion at high temperatures, we constructed a high-temperature pulsed-field-gradient (PFG) nuclear magnetic resonance (NMR) probe capable of measurements at temperatures >700 K. The accuracy of the sample temperature was confirmed via ⁷⁹Br NMR measurements of KBr. ⁷Li PFG-NMR measurements of Li₂CO₃ were performed at temperatures up to 724 K using the probe. The apparent diffusion coefficient of Li ions in Li₂CO₃ was obtained experimentally.

Keywords: High temperature; NMR; diffusion; pulsed field gradient.