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首页> 美国卫生研究院文献>Scientific Reports >Microscopic photoelectron analysis of single crystalline LiCoO2 particles during the charge-discharge in an all solid-state lithium ion battery
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Microscopic photoelectron analysis of single crystalline LiCoO2 particles during the charge-discharge in an all solid-state lithium ion battery

机译：全固态锂离子电池充放电过程中单晶LiCoO2颗粒的显微光电子分析

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摘要

We report synchrotron-based operando soft X-ray microscopic photoelectron spectroscopy under charge-discharge control of single crystalline LiCoO2 (LCO) particles as an active electrode material for an all solid-state lithium-ion battery (LIB). Photoelectron mapping and the photoelectron spectrum of a selected microscopic region are obtained by a customized operando cell for LIBs. During the charge process, a more effective Li extraction from a side facet of the single crystalline LCO particle than from the central part is observed, which ensures the reliability of the system as an operando microscopic photoelectron analyzer that can track changes in the electronic structure of a selected part of the active particle. Based on these assessments, the no drastic change in the Co 2p XPS spectra during charge-discharge of LCO supports that the charge-polarization may occur at the oxygen side by strong hybridization between Co 3d and O 2p orbitals. The success of tracking the electronic-structure change at each facet of a single crystalline electrode material during charge-discharge is a major step toward the fabrication of innovative active electrode materials for LIBs.
机译：我们报告基于同步加速器的操作X射线显微光学光电子能谱在单晶LiCoO2（LCO）粒子的充放电控制下作为全固态锂离子电池（LIB）的活性电极材料。通过定制的LIB操作池获得选定微观区域的光电子映射和光电子光谱。在充电过程中，观察到从单晶LCO颗粒的侧面比从中心部分提取的Li更加有效，这确保了系统作为可操作的微光电子分析仪的可靠性，该分析仪可以跟踪电子结构的变化。活性颗粒的选定部分。基于这些评估，在LCO充放电过程中Co 2p XPS光谱没有发生剧烈变化，这表明通过Co 3d和O 2p轨道之间的强杂交，电荷极化可能会在氧侧发生。在充放电过程中成功跟踪单晶电极材料每个面的电子结构变化是朝着制造用于LIB的创新活性电极材料迈出的重要一步。

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