Hashi Kenjiro, Ohki Shinobu, Mogami Yuuki, Goto Atsushi, Shimizu Tadashi
National Institute for Materials Science, 3-13 Sakura Tsukuba, Ibaraki, 305-0003, Japan.
Anal Sci. 2021 Oct 10;37(10):1477-1479. doi: 10.2116/analsci.21A001. Epub 2021 Mar 12.
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 Br NMR measurements of KBr. Li PFG-NMR measurements of LiCO were performed at temperatures up to 724 K using the probe. The apparent diffusion coefficient of Li ions in LiCO was obtained experimentally.
了解锂离子的传输特性对于提高锂离子电池的性能至关重要。为了研究高温下的离子扩散，我们构建了一个能够在高于700 K的温度下进行测量的高温脉冲场梯度（PFG）核磁共振（NMR）探头。通过KBr的Br NMR测量确认了样品温度的准确性。使用该探头在高达724 K的温度下对LiCO进行了Li PFG-NMR测量。通过实验获得了Li离子在LiCO中的表观扩散系数。
