标题： 陶瓷固态电解质的约束和接触阻抗 显示英文标题

标题： Constriction and contact impedance of ceramic solid electrolytes

摘要： 固态电池的发展受到循环过程中固-固界面退化的影响，这可能导致空洞形成和接触丧失。 在这里，我们系统地研究了电极/Li$_6$PS$_5$Cl 界面上不可恢复和实际的界面接触面积对阻抗谱的影响。 通过改变施加的堆叠压力并控制接触几何形状，我们识别出它们在阻抗谱中的不同特征，并量化了它们对界面电阻和固态电解质有效离子电导率的影响。 实验结果表明，更高的压力和改善的接触面积可以显著降低界面电阻。 界面电阻按照指数为-0.5的幂律随压力变化，为实际接触面积的变化提供了见解。 此外，由于较小的电势梯度和更均匀的电势分布，分散的接触比集中的接触导致更低的阻抗。 我们的模拟预测了接触几何形状的界面电阻，与实验结果一致。 我们的工作强调了不可恢复和可恢复接触损失在控制固态电池阻抗中的不同作用。 显示英文摘要

摘要： The development of solid-state batteries is hindered by the degradation of the solid-solid interface during cycling which can cause void formation and contact loss. Here, we systematically investigate the effect of unrecoverable and real interfacial contact area at the electrode/Li$_6$PS$_5$Cl interface on the impedance spectrum. By varying applied stack pressures and controlling contact geometries, we identify their distinct signatures in the impedance spectrum and quantify their influence on the interfacial resistance and effective ionic conductivity of the solid electrolyte. Experimental results demonstrate that higher pressures and improved contact areas significantly reduce interfacial resistance. The interfacial resistance scales with pressure according to power law with exponent of -0.5, providing insights into the variation of real contact area. Further, distributed contacts lead to lower impedance compared to concentrated contacts due to smaller potential gradients and a more uniform potential distribution. Our simulations predict interfacial resistances of the contact geometries in agreement with experiments. Our work emphasizes the distinct roles of unrecoverable and recoverable contact losses in controlling the impedance of solid-state batteries.