Multidimensional woodchips-like Mn-metal-organic framework for asymmetric supercapacitor devices

IF 7.5 Q1 CHEMISTRY, PHYSICAL Applied Surface Science Advances Pub Date : 2024-10-21 DOI:10.1016/j.apsadv.2024.100650
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Abstract

Multidimensional manganese-metal organic frameworks (Mn-MOF) are synthesized using 1,2,4,5-Benzene tetracarboxylic acid (BTTC) at various temperatures (100–160 °C). The Fourier-transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) techniques successfully confirm the formation of Mn-MOF. Among the various temperatures, the Mn-MOF synthesized at 140 °C (Mn-MOF@BTTC-140) is remarkable because it has excellent crystallinity and a unique morphology, i.e., woodchips-like structure. The synthesized Mn-MOF@BTTC materials are used in supercapacitor applications. In comparison to all materials, Mn-MOF@BTTC-140 revealed the maximum specific capacitance (Cs) of 627 F g-1 @ 1 A g-1, and it displayed 91 % capacitance retention even after the 6000 cycles at a current density of 10 A g-1. Furthermore, the supercapacitor device (SD) constructed using carbon nanofibers (CNF) as the negative electrode and Mn-MOF@BTTC-140 as the positive electrode delivered an energy density of 25 W h kg-1 at a power density of 532 W kg-1. Ultimately, LED lighting demonstrates that our fabricated materials suit practical applications.
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用于不对称超级电容器设备的多维木片状锰金属有机框架
使用 1,2,4,5-苯四甲酸(BTTC)在不同温度(100-160 °C)下合成了多维锰金属有机框架(Mn-MOF)。傅立叶变换红外光谱(FT-IR)和 X 射线衍射(XRD)技术成功证实了锰-MOF 的形成。在不同温度下合成的 Mn-MOF(Mn-MOF@BTTC-140)具有优异的结晶度和独特的形态,即类似木片的结构,因而引人注目。合成的 Mn-MOF@BTTC 材料可用于超级电容器。与所有材料相比,Mn-MOF@BTTC-140 的最大比电容(Cs)为 627 F g-1 @ 1 A g-1,即使在 10 A g-1 的电流密度下循环 6000 次,其电容保持率仍高达 91%。此外,以纳米碳纤维(CNF)为负极、Mn-MOF@BTTC-140 为正极构建的超级电容器装置(SD)在功率密度为 532 W kg-1 时,能量密度达到 25 W h kg-1。最终,LED 照明证明了我们制造的材料适合实际应用。
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CiteScore
8.10
自引率
1.60%
发文量
128
审稿时长
66 days
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