In operando quantitation of Li concentration for a commercial Li‐ion rechargeable battery using high‐energy X‐ray Compton scattering |
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| Authors: | Kosuke Suzuki Ayahito Suzuki Taiki Ishikawa Masayoshi Itou Hisao Yamashige Yuki Orikasa Yoshiharu Uchimoto Yoshiharu Sakurai Hiroshi Sakurai |
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| Affiliation: | 1. Department of Electronics and Informatics, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma376-8515, Japan;2. Japan 3. Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, Hyogo679-5198, Japan;4. Material Platform Engineering Division, Toyota Motor Corporation, 1 Toyota-cho, Toyota, Aichi471-8572, Japan;5. Department of Applied Chemistry, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga525-8577, Japan;6. Graduate School of Human and Environmental Studies, Kyoto University, Sakyo, Kyoto606-8501, Japan |
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| Abstract: | Compton scattering is one of the most promising probes for quantitating Li under in operando conditions, since high‐energy X‐rays, which have high penetration power, are used as the incident beam and the Compton‐scattered energy spectrum has specific line‐shapes for each element. An in operando quantitation method to determine the Li composition in electrodes has been developed by using line‐shape (S‐parameter) analysis of the Compton‐scattered energy spectrum. In this study, S‐parameter analysis has been applied to a commercial coin cell Li‐ion rechargeable battery and the variation of the S‐parameters during the charge/discharge cycle at the positive and negative electrodes has been obtained. By using calibration curves for Li composition in the electrodes, the change in Li composition of the positive and negative electrodes has been determined using the S‐parameters simultaneously. |
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| Keywords: | Li‐ion battery in operando measurement quantitation Compton profile |
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