铜/钴 MOFs 纳米复合材料作为超级电容器电极材料的研究,International Journal of Energy Research

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铜/钴 MOFs 纳米复合材料作为超级电容器电极材料的研究
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2022-07-17 , DOI: 10.1002/er.8406
Zeerak Maliha ₁ , Malika Rani ₁ , R. Neffati _{2,

3} , Arshad Mahmood ₄ , Muhammad Zahir Iqbal ₅ , Aqeel Shah ₆

Affiliation

MOFs（金属有机框架）作为具有多孔结构和易于合成的最新材料出现，导致新材料生长并增加了表面积。纳米晶铜-金属有机骨架（Cu-MOF）、钴-金属有机骨架（Co-MOF）和铜/钴金属有机骨架（Cu/Co MOF）纳米复合材料已通过表面成本有效的水热法合成酸以限制纳米颗粒的生长。合成材料的 X 射线粉末衍射表明 Cu/Co 纳米复合材料的 c 晶格参数降低至 8.062 Å。Cu/Co MOF 纳米复合材料内部存在氧、铜、铬和钴表明纳米复合材料合成成功，而表面形态导致颗粒生长下降，结果值为 3.53 nm。PL（光致发光）光谱显示峰减少，而拉曼光谱表明纳米复合材料内部同时存在铜峰和钴峰。使用 IM KOH 作为电解质分析电化学研究，导致比电容提高 228 FgCu-MOF 为 -1，Co-MOF 为 280 Fg ^-1^， Cu/Co MOF 纳米复合材料为935.8 Fg ^-1。恒电流充电放电 (GCD) 分析表明，Cu/Co MOF 纳米复合材料的功率密度值从 1092 Wkg ^-1增加到 2495.5 Wkg ^-1，能量密度值降低到 45.2 WhKg ^-1，从而允许在电极/电解质界面进行快速离子传输，表明 Cu/ Co MOF 纳米复合材料作为一种高性能电极材料，在超级电容器中具有最大的存储容量。

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Investigation of copper/cobalt MOFs nanocomposite as an electrode material in supercapacitors

MOFs (Metal-organic frameworks) emerging as newest materials with porous structure and ease to synthesize results in new material growth with enhanced surface area. Nanocrystalline copper-metal organic framework (Cu-MOF), cobalt-metal organic framework (Co-MOF), and copper/cobalt metal organic framework (Cu/Co MOF) nanocomposite have been synthesized via superficial cost-effective hydrothermal method by using trimesic acid in order to restrict nano-particle growth. X-ray powder diffraction of the synthesized material indicates a reduction in the c-lattice parameter for Cu/Co nanocomposite to value 8.062 Å. Existence of oxygen, copper, chromium, and cobalt inside the Cu/Co MOF nanocomposite is indicative of successful nanocomposite synthesis whereas surface morphology gives a fall in particle growth resulting value 3.53 nm. PL (Photoluminescence) spectra showing reduction in peaks whereas Raman spectra demonstrate the presence of both copper and cobalt peaks inside the nanocomposite. Electrochemical studies were analyzed using IM KOH as an electrolyte resulting in enhanced specific capacitance of 228 Fg⁻¹ for Cu-MOF, 280 Fg⁻¹ for Co-MOF, and 935.8 Fg⁻¹ for Cu/Co MOF nanocomposite respectively. Galvanostatic charge discharge (GCD) analysis reveals power density value increment from 1092 Wkg⁻¹ to 2495.5 Wkg⁻¹ for Cu/Co MOF nanocomposite with energy density value decreases to 45.2 WhKg⁻¹ allowing rapid ions transport at electrode/electrolyte interface suggesting Cu/Co MOF nanocomposite as a high performance electrode material with maximum storage capacity in supercapacitors.

更新日期：2022-07-17

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