Owing to the increase in need for high-performance energy storage devices, activated carbon has attracted considerable attention as an electrode material for electrical double-layer capacitors (EDLCs). However, the conventional manufacturing process of activated carbon is seriously limited by the depletion of raw material sources. Biomass-based activated carbon, which is currently considered as a breakthrough, exhibits performance limitations such as low specific capacitance and poor high-rate performance. In this study, we propose the use of fluorine-doped mesoporous carbon (F-MAC), which is derived from Ecklonia cava using fluorine impregnation and KOH activation, to address the above challenges. F-MAC exhibits high specific capacitance (184 F/g), excellent high-rate performance (155 F/g at a current density of 20 A/g), and superior cycle stability (82.8% capacitance retention after 2,000 cycles). These performance improvements are attributed to the increased surface area, high mesopore volume fraction, fluorine-doping effect, and high concentration of oxygen functional groups.

由于对高性能能量存储设备的需求增加，活性炭作为双电层电容器（EDLC）的电极材料引起了广泛的关注。但是，传统的活性炭生产工艺受到原材料来源的严重限制。基于生物质的活性炭，目前被认为是一项突破，它表现出诸如低的比电容和较差的高速率性能等性能限制。在这项研究中，我们建议使用氟掺杂的介孔碳（F-MAC）（来自Ecklonia cava，通过氟浸渍和KOH活化）来解决上述挑战。F-MAC具有高比电容（184 F / g），出色的高倍率性能（在20 A / g的电流密度下为155 F / g），以及出色的循环稳定性（2,000次循环后的电容保持率为82.8％）。这些性能的提高归因于增加的表面积，高的中孔体积分数，氟掺杂效应和高浓度的氧官能团。