The development of excellent performance solid-state electrolytes (SSEs) is essential for high-energy solid-state lithium batteries. Herein, solid state composite electrolyte consisting of NASICON particles and PEO-LiTFSI was prepared through a solvent-free procedure. The assembled LFP / PEO-LATP / Li all-solid-state battery can present an initial capacity of 153.8 mA h g⁻¹ and exhibit excellent electrochemical stability with a high capacity retention ratio of 95% after 100 cycles at 60 °C. In addition, a small amount of ionic liquid (IL) was added into hybrid solid electrolyte (HSE) to enhance the interface contact and improved the room temperature performance. Surprisingly, the assembled LFP / HSE / Li battery exhibits a stable discharge capacity of 157.6 mA h g⁻¹ at 25 °C when the content of IL is 3%. The capacity retention can be reached 97.8% over 150 cycles at 60 °C. All the results show that assembled cells with HSE revealed an improved electrochemical performance.

开发性能优异的固态电解质（SSE）对于高能固态锂电池至关重要。在此，通过无溶剂程序制备了由 NASICON 颗粒和 PEO-LiTFSI 组成的固态复合电解质。组装的LFP/PEO-LATP/Li全固态电池可呈现153.8mAh g ^{-1的初始容量}，并表现出优异的电化学稳定性，在60℃下循环100次后容量保持率高达95%。此外，在混合固体电解质（HSE）中添加少量离子液体（IL）以增强界面接触并改善室温性能。令人惊讶的是，当IL含量为3%时，组装的LFP/HSE/Li电池在25℃下表现出157.6mAh g ^{-1的稳定放电容量。}60℃下150次循环后容量保持率可达97.8%。所有结果表明，采用 HSE 组装的电池显示出改进的电化学性能。