Carbon Letters ( IF 5.5 ) Pub Date : 2021-11-03 , DOI: 10.1007/s42823-021-00300-y Hye Jin Oh 1 , Seok Kim 1
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Abstract
We have prepared MIL-101/graphene oxide (GO) composites with various mixing molar ratio of Fe-containing metal–organic frameworks (MOFs) against GO. When synthesizing MOFs, it was possible to synthesize uniform crystal powders using hydrothermal method. MIL-101 consists of a terephthalic acid (TPA) ligand, with the central metal composed of Fe, which was the working electrode material for supercapacitors. Field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy analysis had been done to ascertain microstructures and morphologies of the composites. Cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge–discharge measurements were performed to analyze the electrochemical properties of the composite electrodes in 6 M KOH electrolyte. By controlling the metal ligand mole ratio against GO, we prepared a changed MOF structure and a different composite morphology, which could be studied as one of the promising optimized electrode materials for supercapacitors.
Graphical abstract
中文翻译：
Fe基金属-有机骨架功能化氧化石墨烯复合超级电容器电极的制备及其电容性能
摘要
我们已经制备了 MIL-101/氧化石墨烯 (GO) 复合材料，其中含铁金属有机骨架 (MOF) 与 GO 的混合摩尔比不同。在合成 MOF 时，可以使用水热法合成均匀的晶体粉末。MIL-101 由对苯二甲酸 (TPA) 配体组成，中心金属由 Fe 组成，它是超级电容器的工作电极材料。通过场发射扫描电子显微镜、X射线衍射、傅里叶变换红外光谱和X射线光电子能谱分析确定了复合材料的微观结构和形貌。进行循环伏安法、电化学阻抗谱和恒电流充放电测量以分析复合电极在 6 M KOH 电解质中的电化学性能。
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