Nickel(II) Complexes Derived from Schiff Base Ligands Designed as Electrode Materials in Asymmetric Supercapacitor Coin Cells for Enhanced Energy Storage Performance.

Ibrahim Waziri, Tunde L Yusuf, Alfred J Muller, Charity N Mbileni Morema, Kaushik Mallick, Sarit K Ghosh

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Article in Langmuir : the ACS journal of surfaces and colloids, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Ibrahim WaziriDepartment of Chemical Sciences, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa.ORCID 0000-0003-0995-0451

Tunde L YusufDepartment of Chemistry, Faculty of Natural and Agricultural Sciences, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa.ORCID 0000-0003-3419-9516

Alfred J MullerDepartment of Chemical Sciences, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa.

Charity N Mbileni MoremaNM Envirotech Solutions, Midlands Estate, Centurion 1692, South Africa.

Kaushik MallickDepartment of Chemical Sciences, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa.

Sarit K GhoshDepartment of Chemical Sciences, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa.ORCID 0000-0003-3444-6185

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6 · The paper itself

Abstract

In this study, three nickel(II)-based Schiff base complexes, derived from the condensation of 2-hydroxybenzaldehyde with 2-bromo-4-chloroaniline (C1), 2-bromo-4-methylaniline (C2), and 2-iodo-4-nitroaniline (C3), were synthesized using a one-pot in situ reaction strategy without isolating the corresponding ligands. The complexes were characterized using standard spectroscopic techniques, and the solid-state structures for C1 and C2 were determined by a single-crystal X-ray diffraction analysis. The Schiff base-derived complexes (C1, C2, and C3) were fabricated as an electrode material, and their electrochemical performance was evaluated in a 2 M KOH aqueous electrolyte. Cyclic voltammetry confirmed their pseudocapacitive behavior, as evidenced by distinct redox peaks. Among the three electrodes, the 2-iodo-4-nitroaniline-based complex (C3) exhibited a superior charge-storage capability and higher dielectric polarizability. At 1 A·g

Identifiers

PMID41521586

DOI10.1021/acs.langmuir.5c04823

PMCPMC12856898

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