Pseudocapacitive effects of multi-walled carbon nanotubes-functionalised spinel copper manganese oxide

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Date

2022

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MDPI

Abstract

Spinel copper manganese oxide nanoparticles combined with acid-treated multi-walled carbon nanotubes (CuMn2O4/MWCNTs) were used in the development of electrodes for pseudocapacitor applications. The CuMn2O4/MWCNTs preparation involved initial synthesis of Mn3O4 and CuMn2O4 precursors followed by an energy efficient reflux growthmethod for the CuMn2O4/MWCNTs. The CuMn2O4/MWCNTs in a three-electrode cell assembly and in 3 M LiOH aqueous electrolyte exhibited a specific capacitance of 1652.91 F g􀀀1 at 0.5 A g􀀀1 current load. Similar investigation in 3 M KOH aqueous electrolyte delivered a specific capacitance of 653.41 F g􀀀1 at 0.5 A g􀀀1 current load. Stability studies showed that after 6000 cycles, the CuMn2O4/MWCNTs electrode exhibited a higher capacitance retention (88%) in LiOH than in KOH (64%).

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Keywords

Galvanostatic charge, Nanocomposite electrode, Pseudocapacitor, Spinel metal oxide, Capacitance

Citation

Nolly, C.; Ikpo, C.O.; Ndipingwi, M.M.; Ekwere, P.; Iwuoha, E.I. Pseudocapacitive Effects of Multi-Walled Carbon Nanotubes-Functionalised Spinel Copper Manganese Oxide. Nanomaterials 2022, 12, 3514. https://doi.org/10.3390/ nano12193514

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https://doi.org/10.3390/nano12193514
 http://hdl.handle.net/10566/8143

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Research Articles (Chemistry)