The practical application of sodium-ion hybrid capacitors is limited by their low energy densities resulted from the kinetics mismatch between cathodes and anodes, and the fire safety related to the flammable electrolyte-separator system. Hence, we report a rational design of metal–organic frameworks (MOFs, UiO-66) modified PVDF-HFP separator. High tensile strength and dimensional thermal stability of the separator reduce the risk of electrode short circuit caused by the separator deformation. MCC test demonstrates a reduction of 75% in peak heat release rate (pHRR), indicating an enhanced fire-resistant property of the separator. This is due to the transformation of UiO-66 into ZrO₂ accompanied by the consumption of oxygen and the formation of the barrier char that suppresses further heat release. Quasi-solid-state electrolyte prepared based on this separator presents an enhanced ionic conductivity of 2.44 mS cm⁻¹ and Na-ion transference number of 0.55, which are related to the high porosity (>70%) and electrolyte uptake (~320%) of the separator. Moreover, the open metal sites of UiO-66 can capture PF₆^–and consequently liberate the Na⁺ for faster migration, thus reducing the kinetics mismatch between cathodes and anodes. Such multifunctional separator enables the quasi-solid-state Na-ion hybrid capacitor to achieve high energy density (182 Wh kg⁻¹ @31 W kg⁻¹) and power density (5280 W kg⁻¹ @22 Wh kg⁻¹), as well as excellent cyclic stability (10,000 cycles @1000 mA g⁻¹).

钠离子混合电容器的实际应用受到由于阴极和阳极之间动力学不匹配导致的低能量密度以及与易燃电解质-分离器系统相关的防火安全性的限制。因此，我们报告了金属-有机框架（MOFs，UiO-66）改性 PVDF-HFP 隔膜的合理设计。隔膜的高拉伸强度和尺寸热稳定性降低了隔膜变形导致电极短路的风险。MCC 测试表明峰值热释放率 (pHRR) 降低了 75%，表明隔板的耐火性能增强。这是由于 UiO-66 转化为 ZrO ₂伴随着氧气的消耗和抑制进一步放热的屏障炭的形成。基于该隔膜制备的准固态电解质具有 2.44 mS cm ^-1的增强离子电导率和 0.55 的钠离子迁移数，这与高孔隙率 (>70%) 和电解质吸收 (~320%) 相关。 ) 的分隔符。此外，UiO-66 的开放金属位点可以捕获 PF ₆ ^-从而释放 Na ⁺以加快迁移速度，从而减少正极和负极之间的动力学失配。这种多功能隔板使准固态钠离子混合电容器实现高能量密度（182 Wh kg ^-1 @31 W kg ^-1) 和功率密度（5280 W kg ^-1 @22 Wh kg ^-1），以及出色的循环稳定性（10,000 次循环 @1000 mA g ^-1）。