More attention has been focused on the design of all-solid-state supercapacitors (ASSCs) due to that this kind of supercapacitors can avoid some problems such as electrolyte leakage occurring in liquid electrolyte-based supercapacitors. However, ASSCs present lower specific energy, which is generally in great relation with the very low ionic conductivity of utilized electrolyte. To achieve high-specific-energy ASSCs with superior performance, a redox-active ionic liquid-based ionogel electrolyte (IGE) consisting of 1-butyl-3-methylimidazolium iodide (BMIMI) IL, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and carbon nanotubes (CNTs) was prepared by a solution-casting method. By optimizing BMIMI/PVDF-HFP and CNTs/PVDF-HFP mass ratios, the obtained PVDF-HFP/BMIMI/CNTs IGE presents the maximum ionic conductivity as high as 17.6 mS cm⁻¹. A sandwiched ASSC constructed by two identical activated carbon electrodes and an as-prepared PVDF-HFP/BMIMI/CNTs IGE possesses a high specific energy of 50.1 Wh kg⁻¹ as a result of the extra pseudocapacitance contribution from the redox-reactions related to I-based ions happening at the interface between electrolyte and electrode and the increased ionic conductivity of IGE for the existence of CNTs network into the IGE providing fast ion transfer channel. The self-discharge behavior of this device is effectively weakened due to the addition of CNTs. Furthermore, the promising cyclic stability is achieved.

由于这种超级电容器可以避免一些问题，例如基于液体电解质的超级电容器中发生的电解质泄漏，因此，更多的注意力集中在全固态超级电容器（ASSC）的设计上。但是，ASSC的比能较低，这通常与所用电解质的极低离子电导率有很大关系。为了实现具有优越的性能，氧化还原活性基于离子液体的离子凝胶电解质（IGE）由1-丁基-3-甲基咪唑鎓碘化物（BMIMI）IL，聚（偏二氟高比能量ASSCs共通过溶液浇铸法制备了六氟丙烯（PVDF-HFP）和碳纳米管（CNT）。通过优化BMIMI / PVDF-HFP和CNT / PVDF-HFP的质量比，获得的PVDF-HFP / BMIMI / CNT IGE呈现出高达17.6mS cm ^-1的最大离子电导率。由两个相同的活性炭电极和已制备的PVDF-HFP / BMIMI / CNTs IGE构成的三明治式ASSC具有50.1 Wh kg ^-1的高比能由于在电解质和电极之间的界面上发生的与基于I的离子有关的氧化还原反应所产生的额外假电容贡献，以及由于CNTs网络进入IGE提供了快速的离子传输通道，因此IGE的离子电导率增加。由于添加了CNT，该器件的自放电行为被有效削弱。此外，实现了有希望的循环稳定性。