Transformation of Solid Solution with Spinel-Type Structure Within the Range LiMn2−x(Ni0.33Co0.33Fe0.33)xO4 (0 ≤ x ≤ 2)

Нипан, Г. Д.; Смирнова, М. Н.; Kornilov, D. Yu.; Копьева, М. А.; Никифорова, Г. Е.; Губин, С. П.

doi:10.1007/s11669-020-00841-1

Cited by 1 publication

(1 citation statement)

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“…Solid solutions are widely utilized in energy storage and other fields and often outperform individual spinel oxides for various applications [16][17][18][19]. Spinel materials are of particular interest because they exhibit advanced magnetic, catalytic, and other properties and can be used for the fabrication of multifunctional materials [14,[20][21][22][23][24]. Mn 3 O 4 is a spinel-type ferrimagnetic material that is widely used for the fabrication of advanced spinel solid solutions with enhanced magnetization, catalytic, and energy storage properties in batteries [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Facile Route for Fabrication of Ferrimagnetic Mn3O4 Spinel Material for Supercapacitors with Enhanced Capacitance

Nawwar

Zhitomirsky

2022

Energies

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The purpose of this investigation was the development of a new colloidal route for the fabrication of Mn3O4 electrodes for supercapacitors with enhanced charge storage performance. Mn3O4-carbon nanotube electrodes were fabricated with record-high capacitances of 6.67 F cm−2 obtained from cyclic voltammetry tests at a scan rate of 2 mV s−1 and 7.55 F cm−2 obtained from the galvanostatic charge–discharge tests at a current density of 3 mA cm−2 in 0.5 M Na2SO4 electrolyte in a potential window of 0.9 V. The approach involves the use of murexide as a capping agent for the synthesis of Mn3O4 and a co-dispersant for Mn3O4 and carbon nanotubes. Good electrochemical performance of the electrode material was achieved at a high active mass loading of 40 mg cm−2 and was linked to a reduced agglomeration of Mn3O4 nanoparticles and efficient co-dispersion of Mn3O4 with carbon nanotubes. The mechanisms of murexide adsorption on Mn3O4 and carbon nanotube are discussed. With the proposed method, the time-consuming electrode activation procedure for Mn3O4 electrodes can be avoided. The approach developed in this investigation paves the way for the fabrication of advanced cathodes for asymmetric supercapacitors and multifunctional devices, combining capacitive, magnetic, and other functional properties.

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