Asymmetric Supercapacitors Based on ZnCo2O4 Nanohexagons and Orange Peel Derived Porous Carbon Electrodes

M Haripriya; T Manimekala; Gnanaprakash Dharmalingam; Manickam Minakshi Sundaram; R Sivasubramanian

doi:10.1002/asia.202400202

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Asymmetric Supercapacitors Based on ZnCo2O4 Nanohexagons and Orange Peel Derived Porous Carbon Electrodes

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Asymmetric Supercapacitors Based on ZnCo2O4 Nanohexagons and Orange Peel Derived Porous Carbon Electrodes

M Haripriya, T Manimekala, Gnanaprakash Dharmalingam, Manickam Minakshi Sundaram and R Sivasubramanian

Chemistry, an Asian journal, Vol.19(13), e202400202

2024

DOI: https://doi.org/10.1002/asia.202400202

PMID: 38687089

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Abstract

Herein, the performance of asymmetric supercapacitors (ASC) fabricated using ZnCo2O4 (ZCO) nano-hexagons and orange peel-derived activated carbon (OPAC) as electrodes was studied. ZCO was prepared by a double hydroxide method and OPAC was prepared from orange peel followed by KOH activation. For ZCO, the calcination temperature was determined using TGA analysis. The XRD showed the presence of a cubic spinel structure. The chemical structure was analyzed using XPS, FTIR, and Raman spectroscopy respectively. For OPAC, the presence of an amorphous nature was inferred; FTIR and Raman studies indicate the presence of functional groups and defect structure in the material. The presence of ZCO nano-hexagons was observed from SEM and TEM respectively. For OPAC, an interconnected pore structure was observed from the SEM image. The specific capacitance for ZCO and OPAC was found to be 194 F.g-1 and 159 F.g-1 at a current density of 0.25 A.g-1. Further, an ASC was fabricated using ZCO as a positive and OPAC as a negative electrode in 2M KOH-soaked separator. A cell voltage of 1.2 V was achieved and the specific capacitance was calculated to be 64 F.g-1 at 0.25 A.g-1. Further, the cyclic stability and the changes at the electrode/electrolyte interface were studied.

Details

Title: Asymmetric Supercapacitors Based on ZnCo2O4 Nanohexagons and Orange Peel Derived Porous Carbon Electrodes
Authors/Creators: M Haripriya
T Manimekala - PSG Institute of Advanced Studies
Gnanaprakash Dharmalingam - PSG Institute of Advanced Studies
Manickam Minakshi Sundaram
R Sivasubramanian - Amrita Vishwa Vidyapeetham
Publication Details: Chemistry, an Asian journal, Vol.19(13), e202400202
Publisher: Wiley-VCH GmbH
Identifiers: 991005661491607891
Murdoch Affiliation: Centre for Water, Energy and Waste
Language: English
Resource Type: Journal article

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