Influence of aqueous KOH and H2SO4 electrolytes ionic parameters on the performance of carbon-based supercapacitor electrodes

Mohamad Faizal Yusman Mohd Hanappi, Mohamad Deraman, Mohd Suleman, Najah Syahirah Mohd Nor, Noor Ezniera Shafieza Sazali, Ellisa Hamdan, Nurul Syazwani Moh Tajuddin, Nur Hamizah Basri, Mohd Redwani Mohd Jasni, Mohd. Amir Radhi Othman

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this paper, the suitability of aqueous KOH and H2SO4 electrolytes in terms of ionic size, mobility, conductivity and energy of electrolyte ions with the porosity of activated carbon electrodes are demonstrated. These parameters of ions (K(Formula presented.), OH(Formula presented.), H(Formula presented.), SO(Formula presented.)) are found to affect the overall performances of supercapacitor cells as observed from the results of EIS, CV and GCD studies. The cell using H2SO4 electrolyte exhibits better performance with relatively low value of charge transfer resistance (0.57(Formula presented.)(Formula presented.)), overall cell resistance, 19(Formula presented.)(Formula presented.) (at 10(Formula presented.)mHz) and high value of specific capacitance 547(Formula presented.)F g(Formula presented.) (at 1(Formula presented.)mV s(Formula presented.)), specific energy 10(Formula presented.)W h kg(Formula presented.) (at 0.5(Formula presented.)A g(Formula presented.)) and specific power, 490(Formula presented.)W kg(Formula presented.). These results show that aqueous acid electrolyte is more compatible with carbon electrodes which could be due to the higher ionic energies of H(Formula presented.) and SO(Formula presented.) ions.

Original languageEnglish
JournalFunctional Materials Letters
DOIs
Publication statusAccepted/In press - 2017

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Electrolytes
Carbon
Electrodes
Ions
Activated carbon
Charge transfer
Capacitance
Porosity
Acids
Supercapacitor

Keywords

  • aqueous electrolytes
  • Biomass activated carbon
  • chitosan binder
  • electrochemistry
  • supercapacitor electrodes

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Influence of aqueous KOH and H2SO4 electrolytes ionic parameters on the performance of carbon-based supercapacitor electrodes. / Hanappi, Mohamad Faizal Yusman Mohd; Deraman, Mohamad; Suleman, Mohd; Nor, Najah Syahirah Mohd; Sazali, Noor Ezniera Shafieza; Hamdan, Ellisa; Tajuddin, Nurul Syazwani Moh; Basri, Nur Hamizah; Jasni, Mohd Redwani Mohd; Othman, Mohd. Amir Radhi.

In: Functional Materials Letters, 2017.

Research output: Contribution to journalArticle

Hanappi, Mohamad Faizal Yusman Mohd ; Deraman, Mohamad ; Suleman, Mohd ; Nor, Najah Syahirah Mohd ; Sazali, Noor Ezniera Shafieza ; Hamdan, Ellisa ; Tajuddin, Nurul Syazwani Moh ; Basri, Nur Hamizah ; Jasni, Mohd Redwani Mohd ; Othman, Mohd. Amir Radhi. / Influence of aqueous KOH and H2SO4 electrolytes ionic parameters on the performance of carbon-based supercapacitor electrodes. In: Functional Materials Letters. 2017.
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AU - Hanappi, Mohamad Faizal Yusman Mohd

AU - Deraman, Mohamad

AU - Suleman, Mohd

AU - Nor, Najah Syahirah Mohd

AU - Sazali, Noor Ezniera Shafieza

AU - Hamdan, Ellisa

AU - Tajuddin, Nurul Syazwani Moh

AU - Basri, Nur Hamizah

AU - Jasni, Mohd Redwani Mohd

AU - Othman, Mohd. Amir Radhi

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AB - In this paper, the suitability of aqueous KOH and H2SO4 electrolytes in terms of ionic size, mobility, conductivity and energy of electrolyte ions with the porosity of activated carbon electrodes are demonstrated. These parameters of ions (K(Formula presented.), OH(Formula presented.), H(Formula presented.), SO(Formula presented.)) are found to affect the overall performances of supercapacitor cells as observed from the results of EIS, CV and GCD studies. The cell using H2SO4 electrolyte exhibits better performance with relatively low value of charge transfer resistance (0.57(Formula presented.)(Formula presented.)), overall cell resistance, 19(Formula presented.)(Formula presented.) (at 10(Formula presented.)mHz) and high value of specific capacitance 547(Formula presented.)F g(Formula presented.) (at 1(Formula presented.)mV s(Formula presented.)), specific energy 10(Formula presented.)W h kg(Formula presented.) (at 0.5(Formula presented.)A g(Formula presented.)) and specific power, 490(Formula presented.)W kg(Formula presented.). These results show that aqueous acid electrolyte is more compatible with carbon electrodes which could be due to the higher ionic energies of H(Formula presented.) and SO(Formula presented.) ions.

KW - aqueous electrolytes

KW - Biomass activated carbon

KW - chitosan binder

KW - electrochemistry

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