In the present study, activated carbon has been prepared from custard apple (Annona squamosa) shell via chemical activation process, employing zinc chloride as activating agent. Textural properties such as surface morphology, vibratory response, and structural parameters of synthesised activated carbon were studied using SEM, XRD, Raman spectroscopy, surface area and pore size analysis. Electrochemical characteristics of prepared activated carbon were studied by using it as an efficient supercapacitor electrode. The investigation was done in gel polymer electrolyte using conventional electrochemical techniques. High magnitudes of specific capacitance (91.1 F g −1 ), specific energy (12.7 Wh kg −1 ) and specific power (14.7 kW kg −1 ) at current density of 1 mA cm −1 were observed for assembled supercapacitor cell. Also, assembled supercapacitor cell showed notable cyclic stability, with ∼90% retention in capacitance value for more than 25 000...

中文翻译：

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从蛋壳中提取的活性炭，可作为高效超级电容器

在本研究中，采用氯化锌作为活化剂，通过化学活化工艺，从南美番荔枝（Annona squamosa）壳中制备了活性炭。使用SEM，XRD，拉曼光谱，表面积和孔径分析研究了合成的活性炭的表面性质，振动响应和结构参数等质地特性。通过将其用作有效的超级电容器电极研究了制备的活性炭的电化学特性。使用常规电化学技术在凝胶聚合物电解质中进行了研究。对于组装的超级电容器电池，在电流密度为1 mA cm -1时，观察到较高的比电容（91.1 F g -1），比能量（12.7 Wh kg -1）和比功率（14.7 kW kg -1）。也，