Fabrication of Ni-MOFs/MWCNTs by in situ growth for high-performance supercapacitor electrode materials

• Published in: Journal of materials science. Materials in electronics 2023-10, Vol.34 (28), p.1920, Article 1920
• Main Authors: Wang, Jia-Wei, Meng, Tian-Li, Ma, Ying-Xia, Lei, Lei, Li, Jing, Ran, Fen
• Format: Article
• Language: English
• Subjects: Benzene; Carboxylation; Characterization and Evaluation of Materials; Chemistry and Materials Science; Dicarboxylic acids; Electrochemical analysis; Electrode materials; Electrodes; Low conductivity; Materials Science; Metal-organic frameworks; Multi wall carbon nanotubes; Nanorods; Nickel; Optical and Electronic Materials; Self-assembly; Supercapacitors; Terephthalic acid; Transition metals
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-11286-w

Metal–organic frameworks (MOFs) have low conductivity, which is not conducive to further application. To address the issue, in this work, using carboxylation multiwall carbon nanotubes (MWCNTs-COOH) as carbon materials, benzene-1,4-dicarboxylic acid (PTA) as organic ligands, nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) as transition metal ions precursors, MWCNTs decorated with nickel MOFs (Ni-MOFs/MWCNTs) nanohybrids were fabricated via in situ growth by a one-pot solvothermal method. The electrochemical properties of the Ni-MOFs/MWCNTs nanohybrids obtained by adjusting the dosage of MWCNTs-COOH and the experimental conditions as electrode materials for supercapacitors (SCs) were investigated. The results showed that the Ni-MOFs nanoflowers self-assembled by nanorods were in situ growth on the MWCNTs, which could avoid the agglomeration of Ni-MOFs and MWCNTs, enhance the specific surface area, and expose more active sites to improve the electrochemical properties. The specific capacity of the Ni-MOFs/MWCNTs nanohybrids as electrode materials obtained at the optimal experimental conditions was 749.6 C g −1 at 1.0 A g −1 .