Solid-state lithium metal batteries are the one of most promising energy storage devices. To date, however, it is still considered that the interface wetted by liquid electrolytes can enhance the performance of solid-state lithium batteries. In this work, the resistance of the batteries versus their cycle number is investigated using 1 M LiPF₆ EC/DMC (v/v = 1/1) (LE) and 1 M LiTFSI-PP13TFSI (IL) wetting the interface of the LiFePO₄ cathode and the ionic liquid gel polymer electrolyte (ILGPE). The results indicate that, compared with IL-wetting, LE-wetting treatment can more effectively lower the bulk resistance of the battery. The bulk resistance of the batteries does not alter after cycling, indicating that the ionic conductivity is stable during the charging/discharging. The interfacial resistance and charge transfer resistance of LE-wetted batteries increase by 50 times and 825 times after 50 cycles at C/3 and 23 °C, while the resistance of IL-wetted batteries increase by less than 20 times. Furthermore, the formation of the electrode electrolytes interphase during cycling, which probably accounts for the change of battery resistance observed in solid-state lithium batteries. The ILGPE had superior compatibility and stability with LiFePO₄ cathode, which is also the most basic guarantee for the battery's stable cycling.

固态锂金属电池是最有前途的储能设备之一。然而，迄今为止，仍然认为被液体电解质润湿的界面可以增强固态锂电池的性能。在这项工作中，使用1 M的LiPF ₆ EC / DMC（v / v = 1/1）（LE）和1 M的LiTFSI-PP13TFSI（IL）润湿LiFePO的界面来研究电池的电阻及其循环次数。₄阴极和离子液体凝胶聚合物电解质（ILGPE）。结果表明，与IL润湿相比，LE润湿处理可以更有效地降低电池的体电阻。循环后，电池的体积电阻不变，表明在充电/放电过程中离子电导率稳定。LE润湿的电池在C / 3和23°C下经过50次循环后，其界面电阻和电荷转移电阻分别增加了50倍和825倍，而IL润湿的电池的电阻增加了不到20倍。此外，在循环期间电极电解质相间形成，这可能解释了在固态锂电池中观察到的电池电阻的变化。ILGPE与LiFePO ₄具有出色的兼容性和稳定性 阴极，这也是电池稳定循环的最基本保证。