One-Dimensional Ni-MIL-77 Metal–Organic Framework as an Efficient Electrode Nanomaterial for Asymmetric Supercapacitors

Abstract

The design and synthesis of one-dimensional (1D) metal–organic frameworks (MOFs) with a high surface area are crucial for their potential usage in supercapacitor applications. 1D-Ni-MIL-77 MOF, synthesized by a one-step solvothermal method, is used here to investigate its activity in supercapacitor applications. High surface-to-volume ratios and short ion diffusion path lengths in 1D-structured nanomaterials result in high charge/discharge rates. 1D-Ni-MIL-77 MOF nanobelts show a high surface area of 93.48 m2 g–1 that gives ample active electrochemical sites. 1D-Ni-MIL-77 shows a specific capacitance (C) value of 1376 F g–1 under the current of 1 A g–1. Additionally, an asymmetric supercapacitor (ASC) was assembled by employing activated carbon as the negative electrode and a 1D-Ni-MIL-77 nanobelt as the positive electrode. With the assembled ASC, at a power density of 750 W kg–1, an energy density of 25 W h kg–1 was attained with a voltage ranging from 0 to 1.5 V. The cyclic durability of the ASC was examined, and it exhibited excellent retention of 95% of its initial capacitance after 5000 cycles.

Ni-MOF Nanosheet-Decorated MnS Hollow Microspheres as a p-n Heterojunction for High-Performance Supercapacitors

“…At a high power density of 8054.2 W kg –1 , the energy density still maintains 13.2 W h kg –1 . These values outperform many electrochemical energy storage devices composed of MnS- or Ni-MOF-based electrode materials, such as α-MnS@C//AC (28.4 W h kg –1 at 395 W kg –1 ), γ-MnS/rGO//rGO (23.1 W h kg –1 at 798.9 W kg –1 ), NiCo 2 S 4 @MnS/CC//AC/CC (5.11 W h kg –1 at 7250 W kg –1 ), MnS/NSC//AC (25.2 W h kg –1 at 880.9 W kg –1 ), Ni-MOF/NC-10//AC (23.8 W h kg –1 at 849.7 W kg –1 ), Ni-MOF/PEDOT-50//AC (11.9 W h kg –1 at 4500 W kg –1 ), 1D-Ni-MIL-77//AC (25 W h kg –1 at 750 W kg –1 ), and NiS@C//AC (10.8 W h kg –1 at 8000 W kg –1 ) . Cycling durability is an important factor in evaluating the performance of SCs.…”

Recent advances in metal–organic framework-based photoelectrochemical and electrochemiluminescence biosensors

“…MOF crystals are assembled into 1D structures, which provide a bridge between the nanoscale regime and mesoscale or macroscale objects. 39 In the 2D form, MOFs not only exhibit ultrathin thickness and large lateral size but also are mechanically flexible and optically transparent. 40,41 Moreover, 3D MOFs have an ultra-large specific surface area.…”

“…Meanwhile, 1D-Ni-MIL-77 showed a specific capacitance value of 1376 F g −1 at a current of 1 A g −1 . 39 Due to their large number of active sites and well-organized pore structure, 2D MOFs have been extensively exploited in supercapacitor research. A high-performance electrode has been reported by Bao et al using two-dimensional MOFs that were extracted from conductive hexaaminobenzene (HAB).…”

Advancing Evidence-Based Data Interpretation in UV–Vis and Fluorescence Analysis for Nanomaterials: An Analytical Chemistry Perspective

“…Reliable quantification of nanoparticles absorption, scattering, and emission activities is essential for rational materials characterization, design, and applications as these optical processes differ significantly in their causes, effects, and applications. As examples, metal oxide nanoparticles with strong scattering activities in the UV ranges has been used extensively as sun block, while plasmonic nanoparticles find utilities in biosensing due to their strong scattering in the visible to infrared wavelength range. − The applications of photoactive nanoparticles, referring to chromogenic and fluorogenic nanomaterials, are even more diverse, ranging from photocatalysis, − photoluminescence, − photodynamic therapy, − photoelectronics, − and photothermal energy harvesting, − just to name a few. For these applications, it is the absorbed photons, not the scattered photons, that are directly responsible for chemical reactions in photocatalysis, light emission in photoluminescence, and singlet oxygen generation in photodynamic therapy.…”