The radiolysis of a mixed solvent electrolyte–carbon anode material is investigated for the first time. The present work demonstrates the radiolytic growth of an SEI with a chemical composition similar to that formed during electrochemical cycling, as determined by XPS. The quantity of the SEI increases with increasing irradiation dose. Degradation products formed in the liquid and gas phase are also identified as matching those formed during electrochemical cycling. TEM results support the XPS results of increasing SEI content with increasing irradiation dose. Electrochemical characterization by galvanostatic cycling of test cells indicates that the radiolysis generated SEI greatly improves first cycle efficiency of the materials assembled in half cells, and impedance spectroscopy supports the result with an increase in resistivity observed for irradiated samples. This first study opens the door to the use of irradiation tools for the artificial generation of an SEI and for producing LIB anode materials with improved performance.

中文翻译：

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易地固体电解质相界面合成通过改进的库仑效率的锂离子电池阳极-电解质系统的辐†

首次研究了混合溶剂电解质-碳阳极材料的辐射分解。目前的工作证明了SEI的放射生长，其化学成分类似于通过XPS确定的电化学循环过程中形成的化学成分。SEI的数量随辐照剂量的增加而增加。在液相和气相中形成的降解产物也被鉴定为与电化学循环过程中形成的降解产物相匹配。TEM结果支持XPS结果，即随着辐照剂量的增加，SEI含量也增加。通过测试电池的恒电流循环进行电化学表征，表明放射分解产生的SEI大大提高了组装在半电池中的材料的第一循环效率，阻抗光谱法支持该结果，并提高了被辐照样品的电阻率。这项第一项研究为使用辐射工具人工生成SEI和生产具有改进性能的LIB阳极材料打开了大门。