Identifying the Degradation Mechanism in Commercial Lithium Rechargeable Batteries via High-Energy X-ray Compton Scattering Imaging
Identifying the Degradation Mechanism in Commercial Lithium Rechargeable Batteries via High-Energy X-ray Compton Scattering Imaging
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DOI：
10.3390/app10175855
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发表时间：
2020-08
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通讯作者：
Kosuke Suzuki;Y. Otsuka;N. Tsuji;K. Hoshi;Y. Sakurai;H. Sakurai
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作者：
Kosuke Suzuki;Y. Otsuka;N. Tsuji;K. Hoshi;Y. Sakurai;H. Sakurai
基于同步加速器的高能X射线康普顿散射成像技术是一种很有前途的非破坏性定量研究商品化锂充电电池的技术。我们将康普顿散射成像技术应用于商业钱币型锂电池(VL2020)，以非破坏性地识别电池的降解机理。用这种技术得到的康普顿散射强度与康普顿散射X射线能谱线形(S参数)之间的关系产生了表征老化细胞的独特的分布。这些在老化电池中的分布表明，阳极的稳定相是通过过电压充放电循环形成的。这种稳定的相阻止锂反应，在电解液分解时产生微泡。
Synchrotron-based high-energy X-ray Compton scattering imaging is a promising technique for non-destructively and quantitatively investigating commercialized lithium rechargeable batteries. We apply the Compton scattering imaging technique to commercial coin-type lithium rechargeable cells (VL2020) to non-destructively identify the degradation mechanism of the cell. The correlations between the Compton scattering intensity and line-shape of the Compton scattering X-ray energy spectrum (S-parameter) obtained from this technique produce unique distributions that characterize the aged cell. These distributions in the aged cell indicate that the stable phase of the anode formed through the overvoltage charge–discharge cycle. This stable phase prevents lithium reactions, producing microbubbles with the decomposition of the electrolyte.