Flower-like lamellar SmMn2O5 nanosheets with electrochemical properties for the application in supercapacitor electrodes

Zhang, Yun-Long; Wang, Xue-wei; Ma, Kui; Wen, Xiao-ran; Chen, You-Lin

doi:10.1007/s10853-023-08741-8

Cited by 3 publications

(3 citation statements)

References 43 publications

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“…Additionally, Chen et al found that morphology plays a crucial role in capacitive performance. [51] Through a hydrothermal method, three different morphologies of SmMn 2 O 5 nanocrystals were synthesized. Compared to SmMn 2 O 5 -NPs and SmMn 2 O 5 -NRs, SmMn 2 O 5 -NSs exhibited superior electrochemical properties as a capacitor.…”

Section: Supercapacitormentioning

confidence: 99%

“…[50] Therefore, the robustness of the mullite structure helps prevent the loss of catalytic activity due to phase transitions, making it possible to overcome harsh environmental conditions in practical applications. In addition to being catalysts, these distinctive properties also ensure their broader applications in other areas such as aqueous VOCs treatment, [40] gas-sensitive sensing, [37] supercapacitor, [51,52] oxygen storage [53] , water electrolysis [54] and more. However, to date, there has been no comprehensive summary of the applications of Mn-based mullite-type oxides in various fields.…”

Section: Introductionmentioning

confidence: 99%

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Mn‐Based Mullites for Environmental and Energy Applications

Li,

Wang,

et al. 2024

Advanced Materials

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Mn‐based mullite oxides AMn2O5 (A = lanthanide, Y, Bi) is a novel type of ternary catalyst in terms of their electronic and geometric structures. The coexistence of pyramid Mn3+–O and octahedral Mn4+–O makes the d‐orbital selectively active toward various catalytic reactions. The alternative edge‐ and corner‐sharing stacking configuration constructs the confined active sites and abundant active oxygen species. As a result, they tend to show superior catalytic behaviors and thus gain great attention in environmental treatment and energy conversion and storage. In environmental applications, Mn‐based mullites have been demonstrated to be highly active toward low‐temperature oxidization of CO, NO, volatile organic compounds (VOCs), etc. Recent research further shows that mullites decompose O3 and ozonize VOCs from −20 °C to room temperature. Moreover, mullites enhance oxygen reduction reactions (ORR) and sulfur reduction reactions (SRR), critical kinetic steps in air‐battery and Li–S batteries, respectively. Their distinctive structures also facilitate applications in gas‐sensitive sensing, ionic conduction, high mobility dielectrics, oxygen storage, piezoelectricity, dehydration, H2O2 decomposition, and beyond. A comprehensive review from basic physicochemical properties to application certainly not only gains a full picture of mullite oxides but also provides new insights into designing heterogeneous catalysts.

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Section: Supercapacitormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mn‐Based Mullites for Environmental and Energy Applications

Li,

Wang,

et al. 2024

Advanced Materials

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“…The high magnetization and pseudocapacitive properties of BFO make it a promising magnetically ordered pseudocapacitive (MOPC) material. It is in this regard that many MOPC materials [19], such as Fe 3 O 4 , γ-Fe 2 O 3 , CuFe 2 O 4 , NiFe 2 O 4 , and CoFe 2 O 4 , shown by a factor 10 6 higher capacitance, compared to multiferroics [19][20][21][22][23][24][25]. MOPC exhibits interesting effects related to the coupling of electrochemical charge storage and magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Charge Storage Properties of Ferrimagnetic BaFe12O19 and Polypyrrole–BaFe12O19 Composites

Chen,

Zhitomirsky

2024

Molecules

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This investigation is motivated by an interest in multiferroic BaFe12O19 (BFO), which combines advanced ferrimagnetic and ferroelectric properties at room temperature and exhibits interesting magnetoelectric phenomena. The ferroelectric charge storage properties of BFO are limited due to high coercivity, low dielectric constant, and high dielectric losses. We report the pseudocapacitive behavior of BFO, which allows superior charge storage compared to the ferroelectric charge storage mechanism. The BFO electrodes show a remarkably high capacitance of 1.34 F cm−2 in a neutral Na2SO4 electrolyte. The charging mechanism is discussed. The capacitive behavior is linked to the beneficial effect of high-energy ball milling (HEBM) and the use of an efficient dispersant, which facilitates charge transfer. Another approach is based on the use of conductive polypyrrole (PPy) for the fabrication of PPy-BFO composites. The choice of new polyaromatic dopants with a high charge-to-mass ratio plays a crucial role in achieving a high capacitance of 4.66 F cm−2 for pure PPy electrodes. The composite PPy-BFO (50/50) electrodes show a capacitance of 3.39 F cm−2, low impedance, reduced charge transfer resistance, enhanced capacitance retention at fast charging rates, and good cyclic stability due to the beneficial effect of advanced dopants, HEBM, and synergy of the contribution of PPy and BFO.

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