Abstract Activated carbon cloths have been prepared from denim cloth waste (DCW) through chemical activation with H3PO4. The effect of the H3PO4/DCW impregnation ratio and the carbonization temperature on the porous texture, the chemical composition, the fibers morphology and the electrochemical performance has been studied. Low H3PO4/DCW impregnation ratios lead to flexible and microporous activated carbon cloths, whereas more fragile and rigid activated carbon cloths with higher external surface area are produced upon increasing the amount of H3PO4. An increase in the carbonization temperature allows for obtaining a more ordered and conductive carbon structure. The activated carbon prepared at 900 °C with an impregnation ratio of 0.5 (wt. H3PO4/wt. DCW) exhibits the best performance as electric double layer capacitor. This electrode shows a specific surface area of 2032 m2 g−1 and the highest registered gravimetric capacitance (237 F g−1). Moreover, its flexibility minimizes the contact resistance in the electrode, thus increasing the feasibility of working at higher current densities than the other synthesized electrodes.

中文翻译：

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基于来自牛仔布废料的含 P 和 N 纤维活性炭的柔性无粘合剂电容器

摘要 用牛仔布废料 (DCW) 通过 H3PO4 化学活化制备了活性炭布。研究了H3PO4/DCW浸渍比和碳化温度对多孔结构、化学成分、纤维形态和电化学性能的影响。低 H3PO4/DCW 浸渍比导致柔性和微孔活性炭布，而增加 H3PO4 的量会产生更脆和具有更高外表面积的活性炭布。碳化温度的增加允许获得更有序和导电的碳结构。在 900 °C 下以 0.5 (wt. H3PO4/wt. DCW) 的浸渍比制备的活性炭表现出作为双电层电容器的最佳性能。该电极显示出 2032 m2 g-1 的比表面积和最高记录的重力电容 (237 F g-1)。此外，它的柔韧性使电极中的接触电阻最小化，从而增加了在比其他合成电极更高的电流密度下工作的可行性。