Electrochemical and theoretical study of novel functional porous graphene aerogel-supported Sm2O3 nanoparticles for supercapacitor applications

Mazloum-Ardakani, Mohammad; Sabaghian, Fariba; Naderi, Hamid Reza; Ebadi, Azra; Mohammadian-Sarcheshmeh, Hamideh

doi:10.1007/s10008-019-04457-5

Cited by 21 publications

(18 citation statements)

References 39 publications

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“…The values of 3.2 Ω and 2.0 Ω were obtained for the C‐TiNF and N,C‐TiNF electrodes respectively. As the graphs show, the R ct of the N,C‐TiNF electrode is less than that of the unmodified C‐TiNF electrode, which means that the electrochemical reaction is easier to occur at an electrolyte/electrode interface 44 . In the case of the nitrogen‐doped C‐TiNF, EIS, as a complement to CV and CDC, could exhibit the supercapacitor behavior better than other individual methods.…”

Section: Resultsmentioning

confidence: 99%

Nanofibers modified through carbon and nitrogen co‐doping and phase transformation for application in pseudocapacitors

et al. 2020

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Summary Nitrogen and carbon‐codoped titanium dioxide nanofibers (N,C‐TiNF) were prepared through a feasible and cost‐beneficial electrospinning procedure and introduced as active materials for electrodes in supercapacitors. The influence of nanofibers modification by nitrogen doping was demonstrated on the performance of supercapacitors. In addition, it was shown that the carbon originating from the fiber precursor could be doped on TiNF with no need for a carbon doping agent. The C‐doped TiNF (C,TiNF) was also compared with the N,C‐TiNF to explore the change in the behavior of supercapacitors. The specific capacitance of the prepared N,C‐TiNF electrode (102 F g−1) was found to be four times more than that of the C‐TiNF electrode (25 F g−1) in an Na2SO4 2 M solution. With nitrogen doping on the surface of the C,TiNF, the lattice anatase phase changed to rutile, and the distance between the (O‐2p) valence and conduction bands (Ti‐3d) reduced. As a result, the pseudocapacitance properties were enhanced. It is generally concluded that N, C‐TiNFs are excellent candidates to be applied in supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Nanofibers modified through carbon and nitrogen co‐doping and phase transformation for application in pseudocapacitors

et al. 2020

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“…The distribution of single-particle energy levels in eq is obtained by only considering the kinetic energy contribution in Schrödinger’s equation . Common single-particle energy levels encountered in the literature include conduction and valence band edges in solids as well as HOMO and LUMO levels in molecules. ,− In Figure c , the “particle-in-a-sphere” distribution of single-particle energy levels obtained via eq is populated for various nanosphere radii, assuming a free electron density similar to gold. , Here, it can be seen that substantial level quantization (due to the electronic kinetic energy term) occurs as one approaches the atomic limit (via the separation of single-particle energy levels), but only minor level quantization is contributed by the electronic kinetic energy term in the “nanoscale regime” above a radius of 3 nm or so. The degree of quantization goes down exponentially as the nanoparticle radius is increased.…”

Section: Theory and Methodsmentioning

confidence: 98%

Faradaic Quantized Capacitance as an Ideal Pseudocapacitive Mechanism

et al. 2021

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In this work, we provide a theoretical analysis of quantized capacitance (also referred to as solvated Coulomb blockade) as a pseudocapacitive energy storage mechanism. In particular, we examine how redox species exhibiting quantized capacitance might be engineered to satisfy two basic criteria in the design of an “ideal” pseudocapacitive energy storage mechanism: (1) a near-rectangular voltammetric profile which mimics that of double-layer capacitance and (2) a linear rise in the pseudocapacitive current with respect to the voltammetric scan rate. It is demonstrated that nanoparticles exhibiting quantized capacitance may satisfy the first criterion by tailoring their charging and reorganization energies. It is also shown that the second criterion can be satisfied so long as the voltammetric scan rate does not exceed the electron-transfer rate. By formulating a comprehensive theoretical framework for understanding the electron-transfer properties of quantized capacitance, we arrive at a general phenomenological description of how pseudocapacitive properties might be practically engineered through this mechanism.

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“…Carbon materials, such as AC, CNTs, and graphene, are considered as a hybrid composition to improve other active materials due to their exclusive physical and chemical properties, especially their high conductivity and specific surface area [197,198] . Indeed, the composite of RE and carbon materials is an efficient approach to overcome the shortcomings of RE‐based nanomaterials [33,34,49,50,71,73,74,99,126,127,146,193,199–216] . For instance, compared to Sm 2 O 3 nanoparticles, Dezfuli et al.…”

Section: Re Compounds and Nanocomposites For Scs Applicationmentioning

confidence: 99%

“…[197,198] Indeed, the composite of RE and carbon materials is an efficient approach to overcome the shortcomings of REbased nanomaterials. [33,34,49,50,71,73,74,99,126,127,146,193,[199][200][201][202][203][204][205][206][207][208][209][210][211][212][213][214][215][216] For instance, compared to Sm 2 O 3 nanoparticles, Dezfuli et al found that the ionic/electronic transport resistance of the RGO/Sm 2 O 3 nanocomposite was reduced. [50] For graphene/CeO 2 aerogel (Figure 8), Chen and Xue expounded that the high conductivity of graphene and the synergic effect between graphene and CeO 2 are the key factors that affect the electrochemical…”

Section: Re/carbon-based Compositesmentioning

confidence: 99%

Rare Earth‐Based Nanomaterials for Supercapacitors: Preparation, Structure Engineering and Application

Zhou

2022

ChemSusChem

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Supercapacitors (SCs) can effectively alleviate problems such as energy shortage and serious greenhouse effect. The properties of electrode materials directly affect the performance of SCs. Rare earth (RE) is known as “modern industrial vitamins”, and their functional materials have been listed as key strategic materials. In the past few years, the number of scientific reports on RE‐based nanomaterials for SCs has increased rapidly, confirming that adding RE elements or compounds to the host electrode materials with various nanostructured morphologies can greatly enhance their electrochemical performance. Although RE‐based nanomaterials have made rapid progress in SCs, there are very few works providing a comprehensive survey of this field. In view of this, a comprehensive overview of RE‐based nanomaterials for SCs is provided here, including the preparation methods, nanostructure engineering, compounds, and composites, along with their capacitance performances. The structure–activity relationships are discussed and highlighted. Meanwhile, the future challenges and perspectives are also pointed out. This Review can not only provide guidance for the further development of SCs but also arouse great interest in RE‐based nanomaterials in other research fields such as electrocatalysis, photovoltaic cells, and lithium batteries.

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Electrochemical and theoretical study of novel functional porous graphene aerogel-supported Sm2O3 nanoparticles for supercapacitor applications

Cited by 21 publications

References 39 publications

Nanofibers modified through carbon and nitrogen co‐doping and phase transformation for application in pseudocapacitors

Nanofibers modified through carbon and nitrogen co‐doping and phase transformation for application in pseudocapacitors

Faradaic Quantized Capacitance as an Ideal Pseudocapacitive Mechanism

Rare Earth‐Based Nanomaterials for Supercapacitors: Preparation, Structure Engineering and Application

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