以柚子皮为原料、采用水热浸渍法在氢氧化钾活化作用下制备得到柚子皮基生物质活性多孔炭材料。然后以乙醇和水作为溶剂,采用水热法将柚子皮基活性炭与氧化石墨烯进行复合,通过红外、扫描电镜、热重分析等方法表征了复合活性炭的化学结构和微观形貌,最后采用恒电流充放电、循环伏安和交流阻抗测试等方法对柚子皮基复合活性炭电极的电化学性能进行了比较。结果表明:800℃活化1h和1.0A/g的条件下得到活性炭电极材料比电容可达218.6F/g,说明该活性炭材料具有优异的电化学性能,有望应用于超级电容器领域。
Grapefruit peel-based biomass activated porous carbon material was prepared from grapefruit peel by hydrothermal impregnation method under the activation of potassium hydroxide.Then the grapefruit peel-based activated carbon and the graphene oxide were compounded by hydrothermal method using ethanol and water as solvents.The chemical structure and morphology of the composite activated carbon were characterized by Fourier transform infrared spectroscopy (FT-IR),scanning electron microscope (SEM) and thermogravimetric analysis (TG).The electrochemical performance of the composite activated carbon electrode was compared by galvanostatic charge-discharge,cyclic voltammetry and electrochemical impedance spectroscopy.The results showed that the specific capacitance of the activated carbon electrode material obtained at 800℃ activation for 1h and 1.0A/g could reach 218.6F/g,which indicated that the activated carbon material had excellent electrochemical properties and was expected to be applied in supercapacitors.
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基金资助
国家自然科学基金(51203001);河南省教育厅高等学校重点科研项目(17A430003);河南省科技攻关计划项目(202102310279)
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