The porous carbon is synthesised by chemical activation using cork dust bio-waste as carbon source and the electrochemical performance of the resulting carbon material is tested in even and uneven weight configuration using a two-electrode system. The obtained cork dust derived activated carbon (CDAC) shown a unique honeycomb structured morphology as confirmed by morphological analysis. X-ray diffraction (XRD) and Raman characterisation revealed the graphitic nature of the CDAC. Furthermore, the porous CDAC exhibited high specific surface area (1707 m²/g) and large pore volume (2.4 cc/g) with an average pore size of 4 nm. Even weight supercapacitor cell (SC) (positive and negative electrode with the same weight) and uneven weight SC cell (weight ratio of positive/negative electrodes:1.2) are assembled and tested in 1M TEABF₄/AN. Uneven weight SC cell delivers the highest specific capacitance value of 107 F/g at a current density of 1 A/g. The uneven weight device shows promising cyclic stability without significant changes in capacitance values after 10000 and 5000 charge-discharge cycles at the potential window of 3 V and 3.2 V, respectively. On the contrary, a less specific capacitance (87 F/g at a current density of 1 A/g) observed for the even weight SC cell though high-capacity retention is realised under the same experimental conditions. The enhanced supercapacitor performance of uneven weight configuration SC cell is attributed to the weight balancing of the electrode, high graphitic nature, and unique pore size distribution with interconnected morphology of CDAC.

中文翻译：

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用于高性能超级电容器应用的生物废料衍生的碳-碳基电极的制造

使用软木粉尘生物废料作为碳源，通过化学活化来合成多孔碳，并使用两电极系统在均匀和不均匀重量配置下测试所得碳材料的电化学性能。所获得的软木粉尘衍生的活性炭（CDAC）表现出独特的蜂窝结构形态，如通过形态分析所证实。X射线衍射（XRD）和拉曼光谱表征揭示了CDAC的石墨性质。此外，多孔CDAC表现出高的比表面积（1707m ^2）。/ g）和大孔体积（2.4 cc / g），平均孔径为4 nm。在1M TEABF ₄中组装并测试了重量均匀的超级电容器电池（SC）（正负电极的重量相同）和重量不均的SC电池（正负电极的重量比：1.2）。/一个。重量不均的SC电池在1 A / g的电流密度下可提供107 F / g的最高比电容值。重量不均的器件显示出令人满意的循环稳定性，在10000和5000次充放电循环后，分别在3 V和3.2 V的电势窗口下，电容值没有明显变化。相反，在相同的实验条件下，尽管保持了高容量，但重量均匀的SC电池的比电容较小（电流密度为1 A / g时为87 F / g）。重量不均配置SC电池具有增强的超级电容器性能，这归因于电极的重量平衡，高石墨化性质以及具有CDAC互连形态的独特孔径分布。