High energy density and the resolution of safety concerns are of great importance for various energy storage devices. However, conventional lithium-ion batteries and supercapacitors comprise of liquid organic electrolytes may catch fire, or even explode, when exposed to undesirable conditions such as high temperatures. Herein, we describe the synthesis of a high-performance fire-retardant organic gel polymer electrolyte via a facile epoxy open-ring polymerization strategy, by using a functional poly(ethylene glycol) copolymer cross-linking a novel flame retardant, with a brominated epoxy resin, tetrabromo bisphenol A, as the matrix, and swelled using an organic liquid electrolyte (lithium salts in propylene carbonate solvents). The poly(ethylene glycol) section of this fire-retardant gel polymer electrolyte guarantees high ionic conductivity, which is recorded to be as high as 1.09 × 10⁻³ S cm⁻¹; this is comparable to values obtained for organic liquid electrolytes and superior to the ionic conductivity of previously reported organic gel polymer electrolytes. Furthermore, owing to the polymerization of the flame retardant tetrabromo bisphenol A onto the polymer electrolyte matrix framework, rather than direct dissolution of tetrabromo bisphenol A into the electrolyte, our gel polymer electrolyte exhibits extremely safe fire-retardant properties without negative effects on electrochemical performance. Benefiting from this fire-retardant organic gel polymer electrolyte, the fabricated solid-state supercapacitor exhibits a good electrochemical performance, that is, a high specific capacitance of 166.69 F g⁻¹ at 0.5 A g⁻¹, a large energy density of 42.19 Wh kg⁻¹, and a remarkably flexible performance under bending conditions, which are superior to those for a supercapacitor with a corresponding liquid organic electrolyte. More importantly, the obtained fire-retardant organic gel polymer electrolytes may be useful for the design of advanced next-generation flexible energy devices.

高能量密度和安全问题的解决对于各种能量存储设备非常重要。但是，由液态有机电解质组成的常规锂离子电池和超级电容器在暴露于诸如高温之类的不良条件下可能着火，甚至爆炸。在此，我们描述了一种高性能的阻燃有机凝胶聚合物电解质的合成中通过通过使用功能性聚乙二醇共聚物将新型阻燃剂与溴化环氧树脂四溴双酚A作为基质交联并使用有机液体电解质溶胀（锂碳酸亚丙酯溶剂中的盐）。该阻燃性凝胶聚合物电解质的聚乙二醇部分可确保高离子电导率，据记录该离子电导率高达1.09×10 ^-3  S cm ^-1; 这与有机液体电解质获得的值相当，并且优于先前报道的有机凝胶聚合物电解质的离子电导率。此外，由于阻燃剂四溴双酚A聚合到聚合物电解质基体骨架上，而不是将四溴双酚A直接溶解到电解质中，我们的凝胶聚合物电解质显示出非常安全的阻燃性能，而对电化学性能没有负面影响。得益于这种阻燃有机凝胶聚合物电解质，制成的固态超级电容器表现出良好的电化学性能，即在0.5 A g ^-1时具有166.69 F g ^-1的高比电容，42.19 Wh的大能量密度千克^-1以及在弯曲条件下的显着柔韧性，优于具有相应液态有机电解质的超级电容器。更重要的是，所获得的阻燃有机凝胶聚合物电解质可用于设计先进的下一代柔性能量装置。