High energy and power values are obtained from fabricated electrochemical double layer supercapacitor (EDLS) cells derived from asphaltene precursors, which are a solid by‐product of bitumen extraction in pentane solvents. Chemical activation, using dry KOH, is used to activate carbon fibers. Chemical activation introduces high specific surface areas (SSAs) into the fiber microstructure by partially etching the carbon. The electrodes are prepared by mixing activated fibers, polytetrafluoroethylene (PTFE), and acetylene black to form flexible electrode films. The unique bimodal pore size distribution with large micropore and mesopore volumes (micropore volume as high as 0.88 cm³ g⁻¹), from chemical activation, generate high‐performance EDLS symmetric cells with capacitance values exceeding 310 F g⁻¹ in aqueous electrolytes and 210 F g⁻¹ in ionic liquid electrolytes (at a specific current of 40 mA g⁻¹). A specific energy of 36 Wh kg⁻¹ at a specific power of 525 W kg⁻¹ is reached in ionic liquid electrolytes.

中文翻译：

---

沥青质活性炭纤维制成的电化学双层超级电容器的卓越性能

从沥青质前体衍生的电化学双层超级电容器（EDLS）电池可获得高能量和功率值，该电池是在戊烷溶剂中沥青提取的固体副产品。使用干燥的KOH进行化学活化可活化碳纤维。化学活化通过部分蚀刻碳将高比表面积（SSA）引入纤维微结构。通过混合活性纤维，聚四氟乙烯（PTFE）和乙炔黑以形成柔性电极膜来制备电极。独特的双峰孔径分布，具有大的微孔和中孔体积（微孔体积高达0.88 cm ³  g ^-1）通过化学活化生成高性能EDLS对称电池，在水性电解质中的电容值超过310 F g ^-1，在离子液体电解质中的电容值超过210 F g ^-1（在40 mA g ^-1的特定电流下）。在离子液体电解质中以525 W kg ^-1的比功率达到36 Wh kg ^-1的比能。