Abstract In the present study, activated carbon (AC) was prepared from Eucalyptus globulus seed (EGS) by a simple hydrothermal method followed by chemical activation using potassium hydroxide as the activating agent under different carbonization temperatures. X-ray diffraction and Raman spectroscopic analysis confirmed the amorphous and turbostratic disordered nature of the carbon. FT-IR analysis of the activated carbon samples shows the presence of N and O functional groups. Brunauer-Emmett-Teller (BET) specific surface area analysis of EGS derived activated carbon at 900 °C showed the highest specific surface area of 2388.38 m2g−1 and exhibited a specific capacitance of 150 Fg−1. The appearance of small and large graphitic pores with random orientation and approximately 88.3 wt% of carbon and 11.7 wt% of oxygen were confirmed by SEM/EDX analyses. Further to understand the electrocatalytic nature of the synthesizing carbon, the material was tested as an electrode for supercapacitors. The electrochemical performance was demonstrated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance (EIS) studies. The electrochemical properties of EGS derived activated carbon demonstrate its potential application as high-performance and low-cost supercapacitor electrode material to fabricate energy storage devices.

中文翻译：

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蓝桉种子活性炭的简便合成作为超级电容器的有效电极材料

摘要 在本研究中，以蓝桉种子（EGS）为原料，通过简单的水热法制备活性炭（AC），然后以氢氧化钾为活化剂，在不同的碳化温度下进行化学活化。X 射线衍射和拉曼光谱分析证实了碳的无定形和乱层无序性质。活性炭样品的 FT-IR 分析表明存在 N 和 O 官能团。900 °C 下 EGS 衍生活性炭的 Brunauer-Emmett-Teller (BET) 比表面积分析显示最高比表面积为 2388.38 m2g-1，比​​电容为 150 Fg-1。SEM/EDX 分析证实了具有随机取向的大小石墨孔和大约 88.3 wt% 的碳和 11.7 wt% 的氧的出现。为了进一步了解合成碳的电催化性质，将该材料作为超级电容器的电极进行了测试。通过循环伏安法 (CV)、恒电流充放电 (GCD) 和电化学阻抗 (EIS) 研究证明了电化学性能。EGS 衍生活性炭的电化学性能表明其作为高性能和低成本超级电容器电极材料的潜在应用，以制造储能装置。