Unrevealed Performance of NH4VO3 as a Redox-Additive for Augmenting the Energy Density of a Supercapacitor

Murugesan Sandhiya; Vivekanand; Srinivasan Suresh Balaji; Marappan Sathish

doi:10.1021/acs.jpcc.0c11581

Unrevealed Performance of NH4VO3 as a Redox-Additive for Augmenting the Energy Density of a Supercapacitor

Murugesan Sandhiya, Vivekanand, Srinivasan Suresh Balaji, Marappan Sathish

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

22 Scopus citations

Abstract

Herein, we have used ammonium vanadate (NH4VO3) as a redox-additive for the first time to boost the energy density of a flexible supercapacitor. Surprisingly, a significant enhancement in the specific capacitance (Csp) is attained after the addition of NH4VO3 with H2SO4 (658 F g-1) when compared with H2SO4 (375 F g-1). In addition, the energy density conquered with NH4VO3/H2SO4 (32 Wh kg-1) is 4.5-fold greater than H2SO4 electrolyte at 3 A g-1 (7 Wh kg-1). Moreover, the flexible solid-state supercapacitor (FSSC) device with ammonium vanadate/poly(vinyl alcohol)/sulfuric acid (NH4VO3/PVA/H2SO4) gel electrolyte shows a better electrochemical performance while compared with PVA/H2SO4. The electrochemical performance of the working electrode enhanced after the addition of NH4VO3 with conventional H2SO4 due to the redox reaction between the VO3- and H+ ions.

Original language	English
Pages (from-to)	8068-8079
Number of pages	12
Journal	Journal of Physical Chemistry C
Volume	125
Issue number	15
DOIs	https://doi.org/10.1021/acs.jpcc.0c11581
State	Published - 22 Apr 2021
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/acs.jpcc.0c11581

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title = "Unrevealed Performance of NH4VO3 as a Redox-Additive for Augmenting the Energy Density of a Supercapacitor",

abstract = "Herein, we have used ammonium vanadate (NH4VO3) as a redox-additive for the first time to boost the energy density of a flexible supercapacitor. Surprisingly, a significant enhancement in the specific capacitance (Csp) is attained after the addition of NH4VO3 with H2SO4 (658 F g-1) when compared with H2SO4 (375 F g-1). In addition, the energy density conquered with NH4VO3/H2SO4 (32 Wh kg-1) is 4.5-fold greater than H2SO4 electrolyte at 3 A g-1 (7 Wh kg-1). Moreover, the flexible solid-state supercapacitor (FSSC) device with ammonium vanadate/poly(vinyl alcohol)/sulfuric acid (NH4VO3/PVA/H2SO4) gel electrolyte shows a better electrochemical performance while compared with PVA/H2SO4. The electrochemical performance of the working electrode enhanced after the addition of NH4VO3 with conventional H2SO4 due to the redox reaction between the VO3- and H+ ions.",

author = "Murugesan Sandhiya and Vivekanand and {Suresh Balaji}, Srinivasan and Marappan Sathish",

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AU - Sandhiya, Murugesan

AU - Vivekanand,

AU - Suresh Balaji, Srinivasan

AU - Sathish, Marappan

PY - 2021/4/22

Y1 - 2021/4/22

N2 - Herein, we have used ammonium vanadate (NH4VO3) as a redox-additive for the first time to boost the energy density of a flexible supercapacitor. Surprisingly, a significant enhancement in the specific capacitance (Csp) is attained after the addition of NH4VO3 with H2SO4 (658 F g-1) when compared with H2SO4 (375 F g-1). In addition, the energy density conquered with NH4VO3/H2SO4 (32 Wh kg-1) is 4.5-fold greater than H2SO4 electrolyte at 3 A g-1 (7 Wh kg-1). Moreover, the flexible solid-state supercapacitor (FSSC) device with ammonium vanadate/poly(vinyl alcohol)/sulfuric acid (NH4VO3/PVA/H2SO4) gel electrolyte shows a better electrochemical performance while compared with PVA/H2SO4. The electrochemical performance of the working electrode enhanced after the addition of NH4VO3 with conventional H2SO4 due to the redox reaction between the VO3- and H+ ions.

AB - Herein, we have used ammonium vanadate (NH4VO3) as a redox-additive for the first time to boost the energy density of a flexible supercapacitor. Surprisingly, a significant enhancement in the specific capacitance (Csp) is attained after the addition of NH4VO3 with H2SO4 (658 F g-1) when compared with H2SO4 (375 F g-1). In addition, the energy density conquered with NH4VO3/H2SO4 (32 Wh kg-1) is 4.5-fold greater than H2SO4 electrolyte at 3 A g-1 (7 Wh kg-1). Moreover, the flexible solid-state supercapacitor (FSSC) device with ammonium vanadate/poly(vinyl alcohol)/sulfuric acid (NH4VO3/PVA/H2SO4) gel electrolyte shows a better electrochemical performance while compared with PVA/H2SO4. The electrochemical performance of the working electrode enhanced after the addition of NH4VO3 with conventional H2SO4 due to the redox reaction between the VO3- and H+ ions.

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Unrevealed Performance of NH4VO3 as a Redox-Additive for Augmenting the Energy Density of a Supercapacitor

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