In-Situ Synthesis Strategy of S-Doped Hierarchical Ni-MOF Nanosheet Supercapacitor Electrodes via Nickle Foam Etching

Abstract

Metal–organic frameworks (MOFs) with porous structures are beneficial for electrochemical energy storage. Herein, the in-situ growth of the S-doped Ni-MOF nanosheet (S-NMN) on the surfaces of nickel foams was prepared via a facile solvothermal process. Owing to the rich active sites, small transport barrier, and excellent mechanical stability, the fabricated S-NMN-2 electrode displays a high specific capacity (1952 mF cm–2 at 1 mA cm–2), satisfactory rate performance, and remarkable cyclic stability. For practical application, the assembled S-NMN-2//AC device achieves a high energy density of 0.189 mWh cm–2 at the power density of 1.600 mW cm–2 with prominent cycling stability (93.27% capacity retention after 4000 cycles). The facile strategy of etching nickel foam demonstrates a new idea for developing high-performance supercapacitor materials.

Near-Infrared-Driven β-NaYF4:Yb,Tm,Gd/Ni-MOF Nanocomposites for Efficient Sterilization and Degradation of Organic Contaminants

“…These vibrations are caused by the coordination of the ligand to the Ni metal center; 888 and 821 cm –1 correlate to the C–H group stretching vibration of the benzene ring in 2,5-dihydroxyterephthalic acid, and 3414 cm –1 belongs to the O–H group stretching vibration of the same benzene ring. These results indicate successful preparation of Ni-MOF. , The coordination of the ligand to the Ni metal center is evidenced by the absorption bands at 1558 and 1408 cm –1 in the FTIR spectra of UNM, which correspond to the symmetric and asymmetric stretching vibrations of the −COO– group. The peak observed at 1656 cm –1 represents a combination of the stretching vibration of C=O in the pyrrolidone ring and the stretching vibration of −COO– in the Ni-MOF.…”

“…These results indicate successful preparation of Ni-MOF. 26,27 The coordination of the ligand to the Ni metal center is evidenced by the absorption bands at 1558 and 1408 cm −1 in the FTIR spectra of UNM, which correspond to the symmetric and asymmetric stretching vibrations of the −COO− group. The peak observed at 1656 cm −1 represents a combination of the stretching vibration and 360 nm, as well as blue light emission peaks at 452 and 475 nm, were observed in the UCNRs.…”

High mass loading porous CoNi2S4 nanosheets with ultrahigh areal capacity for flexible supercapacitors

“…The energy density of a single device can reach 0.252 mW h cm −2 when the power density is 2.99 mW cm −2 , which is better than many previously reported devices. 28,53–60 The high loading mass with the well-ordered 3D hierarchical porous nanostructures and high operating voltage of 1.5 V contributes a lot to the high energy density. As shown in Fig.…”

Solvent-Assisted Morphology-Induced Nickel Metal–Organic Framework as a Highly Efficient Electrode for Energy Storage Application

“…The prepared material exhibits a maximum specific capacitance of 1952 mF cm –2 at a current density of 1 mA cm –2 . In real-time applications, the fabricated device (S-NMN-2//AC) exhibits an energy density of 0.189 mW h cm –2 with good cycling stability of 93.27% and capacity retention over 4000 cycles . Prabhakar Vattikuti et al synthesized NiCo bimetallic MOF (NCMF) using the simple solvo-hydrothermal technique and exhibited the 3D hierarchical nanorod-shaped morphology.…”