In this contribution, we investigate the formation and evolution of LiCoO₂–LiPON interfaces upon annealing using photoelectron spectroscopy. We identify interlayer compounds related to the deposition process and study the chemical reactions leading to interlayer formation. Based on the structure of the pristine interface as well as on its evolution upon annealing, we relate reaction layer and space charge layer formation to chemical potential differences between the two materials. The results are discussed in terms of a combined Li-ion and electron interface energy level scheme providing insights into fundamental charge transfer processes. In constructing the energy level alignment, we take into account calculated defect formation energies of lithium in the cathode and solid electrolyte.

中文翻译：

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LiCoO ₂ -LiPON界面上的反应和空间电荷层形成：结合表面科学-模拟方法的缺陷形成和离子能级对准的见解

在这项贡献中，我们使用光电子能谱研究了退火后LiCoO ₂ -LiPON界面的形成和演化。我们确定与沉积过程有关的夹层化合物，并研究导致夹层形成的化学反应。基于原始界面的结构以及退火后的演化，我们将反应层和空间电荷层的形成与两种材料之间的化学势差相关联。结合锂离子和电子界面能级方案对结果进行了讨论，从而提供了对基本电荷转移过程的洞察力。在构造能级对准时，我们考虑了计算得出的锂在阴极和固体电解质中的缺陷形成能。