Enhanced electrochemical performance of supercritical fluid treated N, P co-doped graphene by dual redox-additives

Murugesan Sandhiya; Marappan Sathish

doi:10.1016/j.jpowsour.2022.231587

Enhanced electrochemical performance of supercritical fluid treated N, P co-doped graphene by dual redox-additives

Murugesan Sandhiya, Marappan Sathish

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The low specific energy of carbon-based electrodes in aqueous electrolytes hampers the commercial application of supercapacitors (SCs). Redox-additive addition with conventional electrolyte is an efficient strategy to enhance the specific energy of SC. Here, we demonstrate the constructive synergistic effect and enhance the electrochemical performance by the addition of [Fe(o-phen)₃]²⁺ with [Fe(CN)₆]^3-/H₂SO₄. The increase in the specific capacitance (C_s) of N, P co-doped graphene (NPGO) from 290 F g⁻¹ in H₂SO₄ to 685 F g⁻¹ by the addition of redox-additive [Fe(CN)₆]^3- with H₂SO₄. Further enhance in the C_s to 865 F g⁻¹ has been observing by the addition of second redox-additive [Fe(o-phen)₃]²⁺ with [Fe(CN)₆]^3-/H₂SO₄. The specific energy of flexible supercapacitor (FSC) uplift 3.6-times using [Fe(o-phen)₃]²⁺(0.63 mM)+[Fe(CN)₆](10 mM)/PVA/H₂SO₄ electrolyte than 6.8 Wh kg⁻¹ of PVA/H₂SO₄. The enhance in C_s and specific energy has been noticing after the addition of [Fe(o-phen)₃]²⁺ with [Fe(CN)₆]^3-/H₂SO₄ due to the outer sphere electron transfer reaction between [Fe(o-phen)₃]²⁺ and [Fe(CN)₆]^3- with H₂SO₄.

Original language	English
Article number	231587
Journal	Journal of Power Sources
Volume	540
DOIs	https://doi.org/10.1016/j.jpowsour.2022.231587
State	Published - 30 Aug 2022
Externally published	Yes

Keywords

Flexible supercapacitor
Improved electrochemical performance
Outer sphere electron transfer
Redox-additive
Synergistic effect

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

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10.1016/j.jpowsour.2022.231587

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title = "Enhanced electrochemical performance of supercritical fluid treated N, P co-doped graphene by dual redox-additives",

abstract = "The low specific energy of carbon-based electrodes in aqueous electrolytes hampers the commercial application of supercapacitors (SCs). Redox-additive addition with conventional electrolyte is an efficient strategy to enhance the specific energy of SC. Here, we demonstrate the constructive synergistic effect and enhance the electrochemical performance by the addition of [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4. The increase in the specific capacitance (Cs) of N, P co-doped graphene (NPGO) from 290 F g−1 in H2SO4 to 685 F g−1 by the addition of redox-additive [Fe(CN)6]3- with H2SO4. Further enhance in the Cs to 865 F g−1 has been observing by the addition of second redox-additive [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4. The specific energy of flexible supercapacitor (FSC) uplift 3.6-times using [Fe(o-phen)3]2+(0.63 mM)+[Fe(CN)6](10 mM)/PVA/H2SO4 electrolyte than 6.8 Wh kg−1 of PVA/H2SO4. The enhance in Cs and specific energy has been noticing after the addition of [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4 due to the outer sphere electron transfer reaction between [Fe(o-phen)3]2+ and [Fe(CN)6]3- with H2SO4.",

keywords = "Flexible supercapacitor, Improved electrochemical performance, Outer sphere electron transfer, Redox-additive, Synergistic effect",

author = "Murugesan Sandhiya and Marappan Sathish",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

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doi = "10.1016/j.jpowsour.2022.231587",

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journal = "Journal of Power Sources",

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T1 - Enhanced electrochemical performance of supercritical fluid treated N, P co-doped graphene by dual redox-additives

AU - Sandhiya, Murugesan

AU - Sathish, Marappan

PY - 2022/8/30

Y1 - 2022/8/30

N2 - The low specific energy of carbon-based electrodes in aqueous electrolytes hampers the commercial application of supercapacitors (SCs). Redox-additive addition with conventional electrolyte is an efficient strategy to enhance the specific energy of SC. Here, we demonstrate the constructive synergistic effect and enhance the electrochemical performance by the addition of [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4. The increase in the specific capacitance (Cs) of N, P co-doped graphene (NPGO) from 290 F g−1 in H2SO4 to 685 F g−1 by the addition of redox-additive [Fe(CN)6]3- with H2SO4. Further enhance in the Cs to 865 F g−1 has been observing by the addition of second redox-additive [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4. The specific energy of flexible supercapacitor (FSC) uplift 3.6-times using [Fe(o-phen)3]2+(0.63 mM)+[Fe(CN)6](10 mM)/PVA/H2SO4 electrolyte than 6.8 Wh kg−1 of PVA/H2SO4. The enhance in Cs and specific energy has been noticing after the addition of [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4 due to the outer sphere electron transfer reaction between [Fe(o-phen)3]2+ and [Fe(CN)6]3- with H2SO4.

AB - The low specific energy of carbon-based electrodes in aqueous electrolytes hampers the commercial application of supercapacitors (SCs). Redox-additive addition with conventional electrolyte is an efficient strategy to enhance the specific energy of SC. Here, we demonstrate the constructive synergistic effect and enhance the electrochemical performance by the addition of [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4. The increase in the specific capacitance (Cs) of N, P co-doped graphene (NPGO) from 290 F g−1 in H2SO4 to 685 F g−1 by the addition of redox-additive [Fe(CN)6]3- with H2SO4. Further enhance in the Cs to 865 F g−1 has been observing by the addition of second redox-additive [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4. The specific energy of flexible supercapacitor (FSC) uplift 3.6-times using [Fe(o-phen)3]2+(0.63 mM)+[Fe(CN)6](10 mM)/PVA/H2SO4 electrolyte than 6.8 Wh kg−1 of PVA/H2SO4. The enhance in Cs and specific energy has been noticing after the addition of [Fe(o-phen)3]2+ with [Fe(CN)6]3-/H2SO4 due to the outer sphere electron transfer reaction between [Fe(o-phen)3]2+ and [Fe(CN)6]3- with H2SO4.

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KW - Improved electrochemical performance

KW - Outer sphere electron transfer

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KW - Synergistic effect

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ER -

Enhanced electrochemical performance of supercritical fluid treated N, P co-doped graphene by dual redox-additives

Abstract

Keywords

ASJC Scopus subject areas

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