Dependency of Charge-Discharge Rate on Lithium Reaction Distributions for a Commercial Lithium Coin Cell Visualized by Compton Scattering Imaging

Kosuke Suzuki; Ryo Kanai; Naruki Tsuji; Hisao Yamashige; Yuki Orikasa; Yoshiharu Uchimoto; Yoshiharu Sakurai; Hiroshi Sakurai

doi:10.20944/preprints201808.0413.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 23 August 2018 / Approved: 23 August 2018 / Online: 23 August 2018 (11:31:45 CEST)

In this study, lithium reaction distributions, dependent on charge-discharge rate, were nondestructively visualized for a commercial lithium-ion battery, using the Compton scattering imaging technique. By comparing lithium reaction distributions obtained from two different charge-discharge speeds, residual lithium ions were detected at the center of the negative electrode on a fully discharged state, by relatively high-speed discharge rate. Moreover, we confirmed that inhomogeneous reactions were facilitated on a relatively high-speed charge-discharge rate, in both the negative and positive electrodes. A feature of our technique is that it can be applied to commercially used lithium-ion batteries, because it uses high-energy X-rays with a high penetration power. Our technique thus opens a novel analyzing pathway for developing advanced batteries.

lithium reaction distribution; in-operando measurement; Compton scattering imaging

ENGINEERING, Energy & Fuel Technology

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Dependency of Charge-Discharge Rate on Lithium Reaction Distributions for a Commercial Lithium Coin Cell Visualized by Compton Scattering Imaging

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