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.
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