Solid electrolytes with high ionic conductivity and excellent electrochemical stability are of prime significance to enable the application of solid-state batteries in energy storage and conversion. In this study, solid composite polymer electrolytes (CPEs) based on sodium bis(trifluorosulfonyl) imide (NaTFSI) and poly (ethylene oxide) (PEO) incorporated with active ceramic filler (NASICON) are reported for the first time. With the addition of NASICON fillers, the thermal stability and electrochemical stability of the CPEs are improved. A high conductivity of 2.8 mS/cm (at 80 °C) is readily achieved when the content of the NASICON filler in the composite polymer reaches 50 wt%. Furthermore, Na₃V₂(PO₄)₃/CPE/Na solid-state batteries using this composite electrolyte display good rate and excellent cycle performance.

具有高离子电导率和出色的电化学稳定性的固体电解质对于使固态电池在能量存储和转换中的应用具有至关重要的意义。在这项研究中，首次报道了基于双（三氟磺酰基）酰亚胺钠（NaTFSI）和聚环氧乙烷（PEO）并掺有活性陶瓷填料（NASICON）的固体复合聚合物电解质（CPE）。通过添加NASICON填料，可改善CPE的热稳定性和电化学稳定性。当复合聚合物中NASICON填料的含量达到50 wt％时，很容易实现2.8 mS / cm（在80°C）的高电导率。此外，Na ₃ V ₂（PO ₄）₃使用该复合电解质的/ CPE / Na固态电池显示出良好的速率和出色的循环性能。