Asymmetric supercapacitor based on novel coal fly ash derived metal–organic frameworks as positive electrode and its derived carbon as negative electrode

Khavharendwe Melba Rambau, Delvina Japhet Tarimo, Oladepo Fasakin, Nicholas Mulei Musyoka, Ncholu Manyala

Research output: Journal PublicationArticlepeer-review

8 Citations (Scopus)

Abstract

The paper presents a comparative study between aluminum fumarate metal–organic framework (Al-FumMOF) and a novel coal fly ash derived aluminum MOF (CFA-FumMOF) with their respective MOF-derived carbons (MDCs) for electrochemical performance in supercapacitor application. In the half-cell configuration, Al-FumMOF possessed the highest specific capacity value of 28.62 mAh g−1 and CFA-FumMOF with 9.88 mAh g−1 at a specific current of 0.5 A g−1 in 6 M KOH electrolyte. The carbon derivative from CFA-FumMOF possessed the highest specific capacitance of 306.59 F g−1 at 0.5 A g−1 as compared to carbon obtained from Al-FumMOF (111.94 F g−1). Each MOF was prepared with its respective carbon derivative for an asymmetrical capacitor device with a specific capacity of 5.09 mAh g−1 at 0.5 A g−1. Graphical abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)821-834
Number of pages14
JournalJournal of Applied Electrochemistry
Volume52
Issue number5
DOIs
Publication statusPublished - May 2022
Externally publishedYes

Keywords

  • Aluminum fumarate MOF
  • Asymmetric supercapacitor
  • Coal fly ash derived MOF
  • Enhanced electrochemical performance
  • MOF-derived Carbons

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electrochemistry
  • Materials Chemistry

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