Activated carbons (ACs) are promising materials for supercapacitor application. The production process is however still considered expensive and environmentally harmful due to using harsh chemicals under aggressive conditions. In this research, ACs have been prepared from rubber seed shell (RSS), durian shell (DS) and palm petiole (PP) via an eco-friendly self-activation method with KOH activating agent. The chemical, morphological and textural properties of the carbonaceous materials were studied using various characterization techniques: FTIR, XRD, Raman spectroscopy, FESEM-EDS and BET. The electrochemical behaviors of the AC-based supercapacitor electrodes were examined by CV, GCD and EIS. The highest specific surface area (436 m² g⁻¹) and specific capacitance (178 F g⁻¹) were obtained from PP and DS activated carbons, respectively. The high specific capacitance (C_p) of the DS activated carbon was attributed to its extremely narrow pore size distribution and the presence of excellent charge storage and charge transfer balance. The C_p values obtained are comparable to those reported in the literature; therefore, this study successfully demonstrated a better route to produce an AC-based supercapacitor electrode.

活性炭（AC）是用于超级电容器应用的有前途的材料。然而，由于在侵蚀性条件下使用刺激性化学品，生产过程仍然被认为是昂贵且对环境有害的。在这项研究中，通过使用 KOH 活化剂的环保自活化方法，以橡胶籽壳 (RSS)、榴莲壳 (DS) 和棕榈叶柄 (PP) 为原料制备了活性炭。使用各种表征技术研究了碳质材料的化学、形态和结构特性：FTIR、XRD、拉曼光谱、FESEM-EDS 和 BET。通过 CV、GCD 和 EIS 检查基于 AC 的超级电容器电极的电化学行为。最高的比表面积 (436 m ²  g ^-1 ) 和比电容 (178 F g^-1 ) 分别从 PP 和 DS 活性炭中获得。的高的比电容（C ^ _p的DS活性炭归因于它的极窄的孔径分布的）和优异的电荷存储和电荷传输平衡的存在。获得的C _p值与文献中报道的值相当；因此，这项研究成功地展示了一种更好的方法来生产基于交流的超级电容器电极。