A half-cell of the rechargeable Li-ion battery was developed to characterize an electrolyte structure using high energy x-ray total scattering measurements in combination with a two-dimensional x-ray detector. The scattering pattern consisted of strong Bragg peaks from electrodes and diffuse scatterings from sapphire windows, in addition to a weak halo pattern from the electrolyte. By selectively removing the signals of the electrodes and windows using specific numerical procedures, we could successfully extract the structural information of the electrolyte, which was in reasonable agreement with the reference data obtained from the electrolyte in a glass capillary. The present demonstration with a half-cell is expected to shed new light on operand characterization of the electrolyte structure during charging and discharging.
Development of a half-cell for x-ray structural analysis of liquid electrolytes in rechargeable batteries
Koji Kimura, Hisao Kiuchi, Masahito Morita, Tomoya Kawaguchi, Kazuki Yoshii, Hikari Sakaebe, Kouichi Hayashi; Development of a half-cell for x-ray structural analysis of liquid electrolytes in rechargeable batteries. Rev. Sci. Instrum. 1 March 2020; 91 (3): 033907. https://doi.org/10.1063/1.5124797
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