Micrometer long bimetallic Nickel-cobalt schiff base MOF as supercapacitor electrodes

Nickel and Nickel-cobalt [Ni1/3Co2/3(HL)2].3H2O Schiff base complexes were synthesized from 2-(methoxycarbonyl-hydrazono)-pentanedioic acid, H2L ligand with metal salts. The structural analysis reveals that the prepared samples were endowed with well crystalline nature. The electrodes of Nickel-coba...

Full description

Saved in:

Bibliographic Details
Published in:	Next materials Vol. 7; p. 100339
Main Authors:	Parveen, S., Shanmugapriya, A., Saravanakumar, B., William, J.Johnson, Chithra, N.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-04-2025 Elsevier
Subjects:	Asymmetric device Energy storage Schiff base complex Supercapacitor Supercapacitor Asymmetric device Schiff base complex Energy storage
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Nickel and Nickel-cobalt [Ni1/3Co2/3(HL)2].3H2O Schiff base complexes were synthesized from 2-(methoxycarbonyl-hydrazono)-pentanedioic acid, H2L ligand with metal salts. The structural analysis reveals that the prepared samples were endowed with well crystalline nature. The electrodes of Nickel-cobalt Schiff base complex (Ni-Co) exhibits Faradaic peaks indicating the diffusion controlled charge transfer mechanism. As a supercapacitor electrode, the Ni-Co exhibits higher specific capacitance of 683 F g−1 at a current rate of 1 A g−1, which is higher than the Nickel complex. Further the bimetallic material possesses better cyclic stability and very less charge – transfer resistance. An asymmetric device was fabricated using Ni-Co complex as the positive electrode material and activated carbon as the negative electrode. The as fabricated device displays a specific capacitance of 239 F g−1 with energy density of 69 Wh kg−1 and power density of 1385 W kg−1. This device demonstrated preservation of 91 % of initial capacitance after 2000 cycles. These attractive features demonstrate Ni-Co complex is a better candidate for supercapacitor electrode applications. [Display omitted] •Bimetallic Nickel-Cobalt Schiff nanocomposites were designed using solution based technique.•The molecular composition of Ni–Co solid solution was determined by ICPAES, with the molar ratio of NiCo - 0.60.•The Ni-Co complex has similar kind of thermal patterns yielding NiCo2O4 as an end product.•Complex electrode exhibit maximum capacitance of 683 F g−1 was obtained at a current density of 1 A g−1 along with retention of 88 % capacity after 2000 cycles.
ISSN:	2949-8228 2949-8228
DOI:	10.1016/j.nxmate.2024.100339