Ubiquitous low-cost sodium ore is abundant and increasingly of interest for sodium-based battery research for grid-scale energy storage systems. The conventional organic liquid electrolytes in currently used sodium-based batteries endure inflammability, thermal instability, and risk of safety issues. The recent trend in developing solid-state-Li batteries also thrives on exploring the all-solid-state Na battery. Herein, we report a solid-state Na-ion full cell working at room temperature using a polyvinylidene fluoride (PVDF)-based composite polymer electrolyte and NaZr₂(PO₄)₃-structured Na₃V₂(PO₄)₃ (NVP) electrode. PVDF-based composite polymer electrolyte (CPE) with NaCF₃SO₃ salt and SiO₂ filler displays high conductivity with electrochemical stability. The symmetric solid-state full cell delivers a specific capacity of 76 mA h g⁻¹ at 0.5C rate, and a specific energy of 126 W h kg⁻¹ based on the total mass of the NVP cathode only. The solid-state Na-ion full cell can retain 70% of its initial specific capacity after 100 continuous charge-discharge cycles.

低成本无处不在的钠矿资源丰富，对于网格规模的储能系统的钠基电池研究越来越引起人们的兴趣。当前使用的钠基电池中的常规有机液体电解质具有易燃性，热不稳定性和安全问题的风险。固态锂电池的最新发展趋势还在于探索全固态钠电池。本文中，我们报道了使用聚偏二氟乙烯（PVDF）基复合聚合物电解质和NaZr ₂（PO ₄）₃结构的Na ₃ V ₂（PO ₄）₃在室温下工作的固态Na-离子全电池（NVP）电极。具有NaCF ₃ SO ₃盐和SiO ₂填料的基于PVDF的复合聚合物电解质（CPE）显示出高电导率和电化学稳定性。仅基于NVP阴极的总质量，对称固态全电池在0.5C速率下的比容量为76 mA h g ^-1，比能量为126 W h kg ^-1。经过100个连续的充放电循环，固态Na离子充满电池可以保留其初始比容量的70％。