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Chemical-State Analysis of Li Compounds and Nitrogen-Getter Material for Liquid Li by Soft X-ray Emission Spectroscopy

Mukai, Keisuke Omura, Ryo Yagi, Juro Kasada, Ryuta 京都大学

2022

概要

Lithium metal and oxides are key compounds for Li air battery and nuclear fusion. Constructing two dimensional mappings is a useful approach to understand chemical behavior and degradation mechanism of such materials at the micro-scale. Herein, we employ the soft X-ray emission spectrometer (SXES) to analyze characteristic X-ray emission spectra from the Li metal/oxides and nitrogen-getter material immersed in liquid Li metal. The high energy resolutions allowed us to measure N-Ka and Ti-Li emissions, separately. By comparing with the first-principle calculated density of states, the elemental and chemical state mappings in the degraded materials were successfully constructed.

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