Pseudocapacitive (PC) materials are under investigation for energy storage in supercapacitors, which exhibit exceptionally high capacitance, good cyclic stability, and high power density. The ability to combine high electrical capacitance with advanced ferrimagnetic or ferromagnetic properties in a single material at room temperature opens an avenue for the development of advanced magnetically ordered pseudocapacitive (MOPC) materials. This review covers materials science aspects, charge storage mechanisms, magnetocapacitance, and magnetoelectric (ME) phenomena in MOPC materials. Recent studies demonstrate high PC properties of advanced ferrimagnetic materials, such as spinel ferrites and hexagonal ferrites. Of particular importance is the discovery of PC properties of perovskite-type manganites, which exhibit room temperature ferromagnetism and giant negative magnetoresistance. The coupling of high capacitance and magnetization in MOPC provides a platform for strong ME interactions. Various strategies are used for manipulation of electrical capacitance/magnetization of MOPC by a magnetic field/electrode potential. Magnetocapacitance studies show significant increase in capacitance of MOPC under the influence of a magnetic field. Moreover, the application of a magnetic field results in enhanced energy density and power density, reduction of resistance, and improvement of cyclic stability. Such findings offer a potential of a breakthrough in the development of advanced supercapacitors. High magnetocapacitance and ME phenomena are linked to the influence of magnetic fields on electrolyte diffusion, structure of electrical double layer, charge transfer resistance, and variation of conductivity and magnetization of MOPC materials, which facilitate charge/discharge behavior. Various applications of ME effect in MOPC are discussed. Moreover, advantages of magnetocapacitive MOPC are described for applications in electronic and spintronic devices, supercapacitors, and devices for magnetically enhanced capacitive deionization of water.
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June 2023
Review Article|
May 05 2023
Magnetic supercapacitors: Charge storage mechanisms, magnetocapacitance, and magnetoelectric phenomena
Special Collection:
Energy Storage and Conversion
Rebecca Sikkema
;
Rebecca Sikkema
(Conceptualization, Data curation, Formal analysis, Writing – review & editing)
Department of Materials Science and Engineering, McMaster University
, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
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Igor Zhitomirsky
Igor Zhitomirsky
a)
(Conceptualization, Formal analysis, Funding acquisition, Project administration, Writing – original draft)
Department of Materials Science and Engineering, McMaster University
, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
a)Author to whom correspondence should be addressed: zhitom@mcmaster.ca
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a)Author to whom correspondence should be addressed: zhitom@mcmaster.ca
Note: This paper is part of the special collection on Energy Storage and Conversion.
Appl. Phys. Rev. 10, 021307 (2023)
Article history
Received:
November 11 2022
Accepted:
April 12 2023
Citation
Rebecca Sikkema, Igor Zhitomirsky; Magnetic supercapacitors: Charge storage mechanisms, magnetocapacitance, and magnetoelectric phenomena. Appl. Phys. Rev. 1 June 2023; 10 (2): 021307. https://doi.org/10.1063/5.0134593
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