Role of porosity and diffusion coefficient in porous electrode used in supercapacitors – Correlating theoretical and experimental studies

Puja De; Joyanti Halder; Chinmayee Chowde Gowda; Sakshi Kansal; Surbhi Priya; Satvik Anshu; Ananya Chowdhury; Debabrata Mandal; Sudipta Biswas; Brajesh Kumar Dubey; Amreesh Chandra

doi:10.1002/elsa.202100159

Role of porosity and diffusion coefficient in porous electrode used in supercapacitors – Correlating theoretical and experimental studies

Puja De, Joyanti Halder, Chinmayee Chowde Gowda, Sakshi Kansal, Surbhi Priya, Satvik Anshu, Ananya Chowdhury, Debabrata Mandal, Sudipta Biswas, Brajesh Kumar Dubey, Amreesh Chandra

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

50 Scopus citations

Abstract

Porous electrodes are fast emerging as essential components for next-generation supercapacitors. Using porous structures of Co₃O₄, Mn₃O₄, α-Fe₂O₃, and carbon, their advantages over the solid counterpart is unequivocally established. The improved performance in porous architecture is linked to the enhanced active specific surface and direct channels leading to improved electrolyte interaction with the redox-active sites. A theoretical model utilizing Fick's law is proposed, that can consistently explain the experimental data. The porous structures exhibit ∼50%–80% increment in specific capacitance, along with high rate capabilities and excellent cycling stability due to the higher diffusion coefficients.

Original language	English
Article number	e2100159
Journal	Electrochemical Science Advances
Volume	3
Issue number	1
DOIs	https://doi.org/10.1002/elsa.202100159
State	Published - 1 Feb 2023
Externally published	Yes

Keywords

diffusion coefficient
porous structure
pseudocapacitor

ASJC Scopus subject areas

Chemistry (miscellaneous)
Electrochemistry

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10.1002/elsa.202100159

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De, P., Halder, J., Gowda, C. C., Kansal, S., Priya, S., Anshu, S., Chowdhury, A., Mandal, D., Biswas, S., Dubey, B. K., & Chandra, A. (2023). Role of porosity and diffusion coefficient in porous electrode used in supercapacitors – Correlating theoretical and experimental studies. Electrochemical Science Advances, 3(1), Article e2100159. https://doi.org/10.1002/elsa.202100159

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abstract = "Porous electrodes are fast emerging as essential components for next-generation supercapacitors. Using porous structures of Co3O4, Mn3O4, α-Fe2O3, and carbon, their advantages over the solid counterpart is unequivocally established. The improved performance in porous architecture is linked to the enhanced active specific surface and direct channels leading to improved electrolyte interaction with the redox-active sites. A theoretical model utilizing Fick's law is proposed, that can consistently explain the experimental data. The porous structures exhibit ∼50%–80% increment in specific capacitance, along with high rate capabilities and excellent cycling stability due to the higher diffusion coefficients.",

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AU - De, Puja

AU - Halder, Joyanti

AU - Gowda, Chinmayee Chowde

AU - Kansal, Sakshi

AU - Priya, Surbhi

AU - Anshu, Satvik

AU - Chowdhury, Ananya

AU - Mandal, Debabrata

AU - Biswas, Sudipta

AU - Dubey, Brajesh Kumar

AU - Chandra, Amreesh

PY - 2023/2/1

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N2 - Porous electrodes are fast emerging as essential components for next-generation supercapacitors. Using porous structures of Co3O4, Mn3O4, α-Fe2O3, and carbon, their advantages over the solid counterpart is unequivocally established. The improved performance in porous architecture is linked to the enhanced active specific surface and direct channels leading to improved electrolyte interaction with the redox-active sites. A theoretical model utilizing Fick's law is proposed, that can consistently explain the experimental data. The porous structures exhibit ∼50%–80% increment in specific capacitance, along with high rate capabilities and excellent cycling stability due to the higher diffusion coefficients.

AB - Porous electrodes are fast emerging as essential components for next-generation supercapacitors. Using porous structures of Co3O4, Mn3O4, α-Fe2O3, and carbon, their advantages over the solid counterpart is unequivocally established. The improved performance in porous architecture is linked to the enhanced active specific surface and direct channels leading to improved electrolyte interaction with the redox-active sites. A theoretical model utilizing Fick's law is proposed, that can consistently explain the experimental data. The porous structures exhibit ∼50%–80% increment in specific capacitance, along with high rate capabilities and excellent cycling stability due to the higher diffusion coefficients.

KW - diffusion coefficient

KW - porous structure

KW - pseudocapacitor

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Role of porosity and diffusion coefficient in porous electrode used in supercapacitors – Correlating theoretical and experimental studies

Abstract

Keywords

ASJC Scopus subject areas

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