Solid-state lithium batteries are regarded as promising energy storage devices that meet the requirements for realizing a low-carbon society. Although solid-state batteries have been suffering from low power density, the power density has become comparable to or greater than that of liquid systems in a recently developed battery, which has been achieved not only by the high ionic conductivity of the used sulfide solid electrolyte. This Perspective presents anomalous transport properties appearing at the interfaces in solid-state batteries to highlight the importance of controlling the interface phenomena in achieving the high performance. The battery employs not only the highly conductive sulfide but also some oxides in spite of their low conductivity. LiNbO₃ interposed to the cathode interface effectively reduces the cathode impedance by suppressing lithium depletion at the interface. Li₄Ti₅O₁₂ used as the anode becomes a good conductor in its two-phase region because of enhanced transport properties at the phase boundaries.

中文翻译：

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固态电池接口的正面和负面方面

固态锂电池被认为是满足实现低碳社会要求的有前途的储能设备。尽管固态电池一直遭受低功率密度的困扰，但是功率密度已经变得与最近开发的电池中的液体系统相当或更高，这不仅是通过使用的硫化物固体电解质的高离子传导性来实现的。 。本“透视图”介绍了出现在固态电池界面上的异常传输特性，以强调控制界面现象对实现高性能的重要性。该电池不仅使用了高导电性的硫化物，而且还采用了一些氧化物，尽管它们的导电性很低。铌酸锂₃通过抑制界面处的锂耗尽，将其插入阴极界面可有效降低阴极阻抗。用作阳极的Li ₄ Ti ₅ O ₁₂在其两相区域中由于其在相界处的传输性能增强而成为良好的导体。