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首页> 外文期刊>ACS applied materials & interfaces >Protective Oxide Coating for Ionic Conductive Solid Electrolyte Interphase
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Protective Oxide Coating for Ionic Conductive Solid Electrolyte Interphase

机译：离子导电固体电解质相间的保护性氧化物涂层

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摘要

To employ Li-based batteries to their full potential in a wide range of energy-storage applications, their capacity and performance stability must be improved. Si is a viable anode material for Li-based batteries in electric vehicles due to its high theoretical capacity and good economic feasibility. However, it suffers from physical and chemical degradation, leading to unstable electrochemical performance and preventing its incorporation in new Li-based battery systems. Herein, we applied a poly(vinyl alcohol)-PO4 protective coating for Si graphite anodes and confirmed an improvement in the electrochemical performance. The experimental results revealed that the polymer acts as a binder to alleviate the pulverization of the electrode. Furthermore, the oxide coating reduces the loss of Li2O, which has high ionic conductivity, during operation, resulting in the formation of a stable solid electrolyte interphase. Our findings suggest that a stable and ion-conducting anode/interphase can be developed by applying an oxide and polymer coating in combined approach. Therefore, this study is expected to provide a basis for the further development and design of high-performance Li-based battery systems.
机译：为了在各种储能应用中充分利用锂基电池的潜力，必须提高其容量和性能稳定性。 Si由于其高理论容量和良好的经济可行性而成为电动汽车中锂基电池的可行阳极材料。然而，它遭受物理和化学降解，导致不稳定的电化学性能并阻止其结合到新的基于锂的电池系统中。在此，我们将聚（乙烯醇）-PO4保护涂层应用于Si石墨阳极，并证实了电化学性能的改善。实验结果表明，该聚合物充当粘合剂以减轻电极的粉化。此外，该氧化物涂层减少了在操作期间具有高离子电导率的Li 2 O的损失，导致形成稳定的固体电解质中间相。我们的发现表明，可以通过结合使用氧化物和聚合物涂层来开发稳定且导电的阳极/中间相。因此，该研究有望为高性能锂基电池系统的进一步开发和设计提供基础。

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