The use of a supercritical CO₂ assisted drying process for the preparation of RuO₂ nanoparticles loaded PVDF HFP aerogels is reported in this work. Morphological, mechanical, and electrochemical analyses were performed on the obtained nanocomposites, to ascertain their performance as supercapacitor devices. The supercritical process allowed a homogeneous distribution of the additive in the polymeric matrix and avoided gel shrinkage. Cycling voltammetry and charge/discharge measurements demonstrated an excellent behavior for the nanocomposites. The supercapacitor, at 60% w/w RuO₂, exhibited a specific capacitance of 149.3 F/g at a scan rate of 10 mVs⁻¹, and a Coulombic efficiency of 98%. Through the integration of the discharge curves, the specific capacitances were also calculated. In particular, doubling the current density, e.g., from 1.0 A/g to 2.0 A/g, the specific capacitance only reduced of about 20%.

在这项工作中报道了使用超临界 CO ₂辅助干燥工艺制备负载RuO ₂纳米颗粒的 PVDF HFP 气凝胶。对获得的纳米复合材料进行形态、机械和电化学分析，以确定它们作为超级电容器装置的性能。超临界过程允许添加剂在聚合物基质中均匀分布并避免凝胶收缩。循环伏安法和充电/放电测量表明纳米复合材料具有出色的性能。60% w/w RuO ₂的超级电容器在10 mVs ^-1的扫描速率下表现出149.3 F/g的比电容，库仑效率为 98%。通过对放电曲线的积分，还计算了比电容。特别地，将电流密度加倍，例如从1.0A/g到2.0A/g，比电容仅降低约20％。