The fabrication of eco-benign, low cost, and high-performance supercapacitors comprising hierarchical porous electrodes and superior electrolytes are crucial for effective energy storage. In this study, a comparison of electrochemical performances between jute sticks derived activated carbon (JC) and commercially available activated carbon (AC) based symmetric supercapacitors was carried out. We developed highly effective porous activated hierarchical carbon nanosheets through the pyrolysis of abundantly available jute sticks. Electrochemical double-layer supercapacitor devices were assembled utilizing JC and AC based electrodes with glycerol-based bio-electrolyte. The developed JC-based supercapacitor exhibit a negligible IR drop compared to the AC-based supercapacitor, attributed to low charge transfer resistance in the prepared JC. The results showed that the JC-based supercapacitor provides higher specific capacitance (150 F/g) than the AC-based supercapacitor (29 F/g) at a scan rate of 10 mV/sec. The JC-based supercapacitor illustrates a specific energy density of 20 Wh/kg at a specific power density of 500 W/kg with fabulous performance after 10,000 charge/discharge cycles. The series and parallel connection tests demonstrate a stable behavior and indicate that the specific capacitance and operating potential windows of the JC-based supercapacitor can be tuned. In addition, the fabricated JC-based supercapacitor shows mechanical robustness at different bending positions. Our findings confirm that the processed bio-waste shows promise as energy storage materials.

包含分层多孔电极和优质电解质的环保，低成本，高性能超级电容器的制造对于有效的能量存储至关重要。在这项研究中，对黄麻棒衍生的活性炭（JC）和市售的基于活性炭（AC）的对称超级电容器之间的电化学性能进行了比较。通过对大量可用的黄麻棒进行热解，我们开发了高效的多孔活性分级碳纳米片。使用JC和AC基电极与甘油基生物电解质组装电化学双层超级电容器设备。与基于交流的超级电容器相比，已开发的基于JC的超级电容器的IR下降可忽略不计，这归因于所制备的JC的低电荷转移电阻。结果显示，在10 mV / sec的扫描速率下，基于JC的超级电容器比基于AC的超级电容器（29 F / g）提供更高的比电容（150 F / g）。基于JC的超级电容器在500 W / kg的比功率密度下显示了20 Wh / kg的比能量密度，在10,000次充电/放电循环后表现出惊人的性能。串联和并联测试表明性能稳定，表明可以调节基于JC的超级电容器的比电容和工作电势窗口。此外，所制造的基于JC的超级电容器在不同的弯曲位置显示出机械强度。我们的发现证实，经过处理的生物废物显示出有望用作储能材料。