[17a-Z11-1~12] 2.3 Application, radiation generators, new technology

[17a-Z11-4] Spatial distribution of charge-discharge reaction in Li secondary battery measured by photon counting CT

〇Hiroshi Sakurai¹, Shunta Suzuki¹, Kazushi Hoshi¹, Kosuke Suzuki¹, Daiki Watabe¹, Yumiko Ohno², Masami Torikoshi³ (1.Gunma Univ., 2.Gunma Pref. Coll Hlth. Sci., 3.ISTC)

Keywords:photon counting CT, Li ion battery, reaction distribution

A coin type Li secondary battery (VL2020) was measured by a photon counting CT with energy sensitive detector. CT images with energy information ( X -ray attenuation coefficient spectra between 30keV to 100keV) were obtained. From the analysis of the X -ray attenuation coefficient spectra, we got effective atomic number and density distributions in the coin type battery. The effective atomic numbers and effective densities changed upon charge-discharge cycle, which showed the spatial distribution in the electrodes. This suggests the photon counting CT system can evaluate the charge-discharge reaction distribution in a Li ion battery.