Magnetic Supercapacitors-Particle Morphology Have Significant Impact on the Electrochemical Performance

Joyanti Halder; Sudipta Biswas; Ananya Chowdhury; Debabrata Mandal; Sakshi Kansal; Surbhi Priya; Puja De; Alok Kumar Srivastava; Amreesh Chandra

doi:10.1021/acs.jpcc.3c01223

Magnetic Supercapacitors-Particle Morphology Have Significant Impact on the Electrochemical Performance

Joyanti Halder, Sudipta Biswas, Ananya Chowdhury, Debabrata Mandal, Sakshi Kansal, Surbhi Priya, Puja De, Alok Kumar Srivastava, Amreesh Chandra

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

10 Scopus citations

Abstract

Morphology tuning of the electrode material is a promising approach to improve the overall performance of the supercapacitor. To date, there is no strategy that shows that magnetic-field-dependent supercapacitive behavior can also be tuned by changing the morphology. In this work, using various morphologies of a negative electrode material α-Fe₂O₃ viz., rod, porous rods, solid spheres (SS), and hollow spheres (HS), the effect of morphology on magnetic supercapacitors is unequivocally established. A theoretical model is also proposed to correlate the electrochemical response with the diffusion behavior of electrolyte ions. Under the application of the 200 Gauss magnetic field, an increment of 55% in the specific capacitance is obtained. The change under magnetic field is correlated with changing surface states. This is proven by corresponding electrocatalysis (HER and OER) performance under magnetic field.

Original language	English
Pages (from-to)	14623-14635
Number of pages	13
Journal	Journal of Physical Chemistry C
Volume	127
Issue number	30
DOIs	https://doi.org/10.1021/acs.jpcc.3c01223
State	Published - 3 Aug 2023
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.3c01223

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title = "Magnetic Supercapacitors-Particle Morphology Have Significant Impact on the Electrochemical Performance",

abstract = "Morphology tuning of the electrode material is a promising approach to improve the overall performance of the supercapacitor. To date, there is no strategy that shows that magnetic-field-dependent supercapacitive behavior can also be tuned by changing the morphology. In this work, using various morphologies of a negative electrode material α-Fe2O3 viz., rod, porous rods, solid spheres (SS), and hollow spheres (HS), the effect of morphology on magnetic supercapacitors is unequivocally established. A theoretical model is also proposed to correlate the electrochemical response with the diffusion behavior of electrolyte ions. Under the application of the 200 Gauss magnetic field, an increment of 55% in the specific capacitance is obtained. The change under magnetic field is correlated with changing surface states. This is proven by corresponding electrocatalysis (HER and OER) performance under magnetic field.",

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AU - Halder, Joyanti

AU - Biswas, Sudipta

AU - Chowdhury, Ananya

AU - Mandal, Debabrata

AU - Kansal, Sakshi

AU - Priya, Surbhi

AU - De, Puja

AU - Srivastava, Alok Kumar

AU - Chandra, Amreesh

PY - 2023/8/3

Y1 - 2023/8/3

N2 - Morphology tuning of the electrode material is a promising approach to improve the overall performance of the supercapacitor. To date, there is no strategy that shows that magnetic-field-dependent supercapacitive behavior can also be tuned by changing the morphology. In this work, using various morphologies of a negative electrode material α-Fe2O3 viz., rod, porous rods, solid spheres (SS), and hollow spheres (HS), the effect of morphology on magnetic supercapacitors is unequivocally established. A theoretical model is also proposed to correlate the electrochemical response with the diffusion behavior of electrolyte ions. Under the application of the 200 Gauss magnetic field, an increment of 55% in the specific capacitance is obtained. The change under magnetic field is correlated with changing surface states. This is proven by corresponding electrocatalysis (HER and OER) performance under magnetic field.

AB - Morphology tuning of the electrode material is a promising approach to improve the overall performance of the supercapacitor. To date, there is no strategy that shows that magnetic-field-dependent supercapacitive behavior can also be tuned by changing the morphology. In this work, using various morphologies of a negative electrode material α-Fe2O3 viz., rod, porous rods, solid spheres (SS), and hollow spheres (HS), the effect of morphology on magnetic supercapacitors is unequivocally established. A theoretical model is also proposed to correlate the electrochemical response with the diffusion behavior of electrolyte ions. Under the application of the 200 Gauss magnetic field, an increment of 55% in the specific capacitance is obtained. The change under magnetic field is correlated with changing surface states. This is proven by corresponding electrocatalysis (HER and OER) performance under magnetic field.

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Magnetic Supercapacitors-Particle Morphology Have Significant Impact on the Electrochemical Performance

Abstract

ASJC Scopus subject areas

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