Carbon Nanotubes Decorated Bimetallic Metal–Organic Framework Nanocomposite for High-Performance Symmetric Supercapacitor Device and Their Charge Storage Mechanism

IF 5.2 3区 工程技术 Q2 ENERGY & FUELS
Mohammad Naved Khan, Fouzia Mashkoor, Mohd Shoeb*, Sang-Soo Baek* and Changyoon Jeong*, 
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引用次数: 0

Abstract

Metal–organic frameworks (MOFs) have garnered significant interest due to their diverse properties, indicating their potential as energy storage applications. Integrating carbon compounds can further enhance their electrochemical activity. In this study, we present a novel method for synthesizing bimetallic nickel- and yttrium-based metal–organic frameworks (NiY-MOFs) anchored with varying weight percentages of carbon nanotubes (CNTs): 5% CNT with NiY-MOF (C1@NiY-MOF), 10% CNT with NiY-MOF (C3@NiY-MOF), and 15% CNT with NiY-MOF (C5@NiY-MOF). The focus was on optimizing the CNT concentration in bimetallic NiY-MOF for high-performance supercapacitors. The optimal concentration of CNT in NiY-MOF was identified as 10% (C3@NiY-MOF), which was subsequently used to fabricate symmetric supercapacitor devices. The findings indicate that the C3@NiY-MOF (209.61 F/g) Y-MOF (245.03F/g), NiY-MOF (353.32 F/g), C1@NiY-MOF (570.61 F/g), and C5@NiY-MOF (713.26 F/g) all samples were measured at a current density 2 A/g. Additionally, the C3@NiY-MOF electrodes retained 89% of their capacitance after 10,000 cycles. The capacitive and diffusive contributions of the C3@NiY-MOF electrode were examined using regression parameters obtained from Dunn and Trasatti’s models. Moreover, practical applicability was illustrated by incorporating the optimized electrode C3@NiY-MOF onto carbon cloth and constructing a symmetric supercapacitor device with a poly(vinyl alcohol)-KOH gel serving as the electrolyte and electrode separator. The device demonstrated a specific capacitance of 297.82 F/g at a current density of 1 A/g and a maximum energy density of 57.90 Wh/kg at a power density of 500 W/kg.

Abstract Image

碳纳米管修饰双金属金属-有机骨架纳米复合材料的高性能对称超级电容器器件及其电荷存储机制
金属有机框架(mof)由于其不同的性质而引起了人们的极大兴趣,这表明了它们在储能应用方面的潜力。整合碳化合物可以进一步提高其电化学活性。在这项研究中,我们提出了一种新的方法来合成双金属镍基和三元基金属有机框架(NiY-MOF),这些框架由不同重量百分比的碳纳米管(CNTs)固定:5%的NiY-MOF CNT (C1@NiY-MOF), 10%的NiY-MOF CNT (C3@NiY-MOF)和15%的NiY-MOF CNT (C5@NiY-MOF)。重点是优化双金属ni - mof中碳纳米管的浓度,用于高性能超级电容器。NiY-MOF中碳纳米管的最佳浓度为10% (C3@NiY-MOF),随后用于制造对称超级电容器器件。结果表明,在电流密度为2 a /g的情况下,Y-MOF (245.03F/g)、ny - mof (353.32 F/g)、C1@NiY-MOF (570.61 F/g)和C5@NiY-MOF (713.26 F/g)样品的测量值均为C3@NiY-MOF (209.61 F/g)。此外,C3@NiY-MOF电极在10,000次循环后保持了89%的电容。利用从Dunn和Trasatti的模型中获得的回归参数,对C3@NiY-MOF电极的电容和扩散贡献进行了检验。此外,通过将优化电极C3@NiY-MOF结合到碳布上,并以聚乙烯醇-KOH凝胶作为电解质和电极分离器构建对称超级电容器装置,说明了其实际适用性。该器件在电流密度为1 a /g时的比电容为297.82 F/g,在功率密度为500 W/kg时的最大能量密度为57.90 Wh/kg。
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来源期刊
Energy & Fuels
Energy & Fuels 工程技术-工程:化工
CiteScore
9.20
自引率
13.20%
发文量
1101
审稿时长
2.1 months
期刊介绍: Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.
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