Highlights<'/> Binder-induced surface structure evolution effects on Li-ion battery performance
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Binder-induced surface structure evolution effects on Li-ion battery performance

机译：粘合剂引起的表面结构演变对锂离子电池性能的影响

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Highlights•Structure and morphology of anode surface are strongly correlated to the binders.•The binder contribution to the structure and morphology evolution of anode and their effect on its performance is discussed.•Undeveloped surface layer leads to deterioration of active material.•Progressive passivation of the surface layer hinders the battery performance.AbstractA comparative investigation on binder induced chemical and morphological evolution of Li4Ti5O12electrodes was performed via X-ray photoemission spectroscopy, scanning electron microscopy, and electrochemical measurements. Composite electrodes were obtained using three different binders (PAA, PVdF, and CMC) with 80:10:10 ratio of active material:carbon:binder. The electrochemical performances of the electrodes, were found to be intimately correlated with the evolution of the microstructure of the electrodes, probed by XPS and SEM analysis. Our analysis shows that the surface chemistry, thickness of the passivation layers and the morphology of the electrodes are strongly dependent on the type of binders that significantly influence the electrochemical properties of the electrodes. These results point to a key role played by binders in optimization of the battery performance and improve our understanding of the previously observed and unexplained electrochemical properties of these electrodes.
机译： 突出显示 • 阳极表面的结构和形态与粘合剂紧密相关。 • 粘合剂对阳极结构和形态演变及其对阳极性能的影响是 • 未显影的表面层会导致活性物质劣化。 • 表面层的逐渐钝化会影响电池性能。 < / ce：abstract> 摘要 由结合剂诱导的Li 4 Ti的化学和形态演变的比较研究通过X射线光电子能谱，扫描电子显微镜和 5 O 12 电极电化学测量。使用三种不同的粘合剂（PAA，PVdF和CMC）以80:10:10的活性材料：碳：粘合剂的比例获得复合电极。通过XPS和SEM分析，发现电极的电化学性能与电极微观结构的演变密切相关。我们的分析表明，表面化学性质，钝化层的厚度以及电极的形态在很大程度上取决于粘合剂的类型，而粘合剂的类型会显着影响电极的电化学性能。这些结果表明粘合剂在优化电池性能中发挥了关键作用，并增进了我们对这些电极先前观察到的和无法解释的电化学性能的理解。

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