Optimized Fabrication of Bimetallic ZnCo Metal–Organic Framework at NiCo-Layered Double Hydroxides for Multiple Storage and Capability Synergy All-Solid-State Supercapacitors

Abstract

Rational design and structural regulation of hybrid nanomaterials with superior electrochemical performance are crucial for developing sustainable energy storage platforms. Among these materials, NiCo-layered double hydroxides (NiCo-LDHs) demonstrate an exceptional charge storage capabilities owing to their tunable 2D lamellar structure, large interlayer spacing, and rich redox electrochemically active sites. However, NiCo-LDHs still suffer from sever agglomeration of their particles with limited charge transfer rates, resulting in an inadequate rate capability. In this study, bimetallic ZnCo-metal organic framework (MOF) tripods were grown on the surface of NiCo-LDH nanowires, which significantly reduced the self-agglomeration and stacking of the NiCo-LDH nanowire arrays, offering more accessible active sites for charge transfer and shortening the path for ion diffusion.

Zeolitic imidazolate framework-8 encapsulated with Mo-based polyoxometalates as surfaces with antibacterial activity against Escherichia coli

“…2b. The spectrum of ZIF-8 MOF demonstrates a sharp peak at 422 cm −1 corresponding to the Zn-N stretching vibration of the coordination between the N atom of the 2-MIM linker and Zn, 44,45 whereas the absorption peaks located at 756 and 690 cm −1 are attributed to the out-of-plane bending of the imidazole ring. 46,47 Moreover, the bending and stretching vibrations of the C-N bond in the 1,3-diazole ring are identied from the absorption bands at 994 and 1144 cm −1 , respectively.…”

Surface-Sulfurized Zn-MOF Grown on Ni-Foam with Various Sulfurizing Agents for Aqueous Hybrid Supercapacitor Device Fabrication

“…It provided a maximum specific capacity of 666.8 C g −1 at a specific current of 1 A g −1 . 25 Mohamed et al designed bimetallic ZnCo-MOF tripods at NiCo-layered double hydroxide (LDH) nanowires. LDHs are used for improving the electrical conductivity of the electrode material.…”

“…LDHs are used for improving the electrical conductivity of the electrode material. The fabricated hybrid ZnCo-MOF@NiCo-LDH provided a remarkable specific capacitance of 1611 F g –1 at 2 A g –1 with a mass loading of 0.8 mg cm –2 . Liu et al improved the electrical conductivity of electrode material by integrating PN codoped carbon matrix with phosphorus-doped Co 3 O 4 nanoparticles derived from Co-MOF.…”

Unleashing the Full Potential of Electrochromic Heterostructured Nickel–Cobalt Phosphate for Optically Active High-Performance Asymmetric Quasi-Solid-State Supercapacitor Devices

“…Therefore, expanding the operating window would efficiently enhance the energy density of ultracapacitors . Consequently, fabricating asymmetric supercapacitor devices has become a modern approach to achieving a high working range and specific capacity without sacrificing the power density . The asymmetric supercapacitor devices, especially the hybrid type, aim to combine several merits by connecting the redox active electrodes (faradaic), which are usually applied as positive electrodes due to their high conspicuous capacity, and carbon-based electrodes (nonfaradaic electric double layer; EDL), which are considered potential negative electrodes as they are characterized with a high operating window and fair specific capacitance .…”