N-Graphene-Metal-Oxide(Sulfide) hybrid Nanostructures: Single-step plasma-enabled approach for energy storage applications

Dias, Ana; Bundaleska, N.; Felizardo, E.; Цыганов, Д. Л.; Almeida, A.; Ferraria, Ana Maria; Rego, A.M. Botelho do; Abrashev, M. V.; Strunskus, Th.; Santhosh, N.; Cvelbar, Uroš; Zavašnik, Janez; Montemor, M.F.; Almeida, M.M.; Carvalho, Patrícia Almeida; Kissovski, J.; Alves, L. L.; Tatarova, E.

doi:10.1016/j.cej.2021.133153

Cited by 19 publications

(12 citation statements)

References 47 publications

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“…To get a deep insight into the structural organization of the VCNT and VCNT/MoS 2 composite, the electrode samples were subjected to Raman spectroscopy, and the results are shown in Figure a. Both the analyzed samples depicted the characteristic peaks of D (defect) and G (graphitic) bands at ∼1350 and ∼1590 cm –1 , respectively. , In addition, peaks at ∼2700 and ∼2940 cm –1 are observed for both the samples, related to 2D and D + D′ bands. , The presence of the well-distinguished G and 2D peaks confirms the high graphitic nature of the carbon in the VCNT and VCNT/MoS 2 composite. Furthermore, the presence of the D peak in the carbon structures indicates the defect-rich carbon backbones, which favors the charge storage during the electrochemical reactions.…”

Section: Resultsmentioning

confidence: 98%

“…28,30 In addition, peaks at ∼2700 and ∼2940 cm −1 are observed for both the samples, related to 2D and D + D′ bands. 30,31 The presence of the welldistinguished G and 2D peaks confirms the high graphitic nature of the carbon in the VCNT and VCNT/MoS 2 composite. Furthermore, the presence of the D peak in the carbon structures indicates the defect-rich carbon backbones, which favors the charge storage during the electrochemical reactions.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Moving toward Smart Hybrid Vertical Carbon/MoS₂ Binder-Free Electrodes for High-Performing Sodium-Ion Batteries

Shaji

Santhosh

Zavašnik

et al. 2023

ACS Sustainable Chem. Eng.

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Finding potential electrodes with smart construction and design is one of the major tasks in the development of advanced sodium-ion batteries (SIBs) and in bridging the gap by bringing them to realization. In this work, we report on the design of such a binder-free composite anode realized by combining vertical carbon nanotube/molybdenum sulfide (VCNT/MoS 2 ) hybrid nanostructures. The well-aligned vertical nanostructures in the binder-free VCNT/MoS 2 hybrid composite electrode enhance the electrolyte penetration into the electrode and shorten the ion diffusion channels. Moreover, the VCNT provides better ion/ electron conductivity for the electrode. Due to these favorable characteristics, binder-free VCNT/MoS 2 hybrid composite electrodes exhibit superior electrochemical properties when employed as an anode for SIBs, especially superior rate capability with a specific discharge capacity of 403 mA h g −1 at a high current density of 3200 mA g −1 . The findings are expected to lead us in the direction of designing smart electrodes with hybrid nanostructured active materials, completely free of any binder for high-performing electrochemical energy storage applications.

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Section: Resultsmentioning

confidence: 98%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Moving toward Smart Hybrid Vertical Carbon/MoS₂ Binder-Free Electrodes for High-Performing Sodium-Ion Batteries

Shaji

Santhosh

Zavašnik

et al. 2023

ACS Sustainable Chem. Eng.

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“…Powdered samples were fixed on the XPS holder with a double face tape and analyzed at UHV, at TOA = 45 • . The BE was corrected considering the charge shift observed for the sp 2 C-C and C-H peak set at 284.4 eV [52]. Other operational conditions and data treatment details were as published elsewhere [65].…”

Section: Methodsmentioning

confidence: 99%

Effect of Graphene vs. Reduced Graphene Oxide in Gold Nanoparticles for Optical Biosensors—A Comparative Study

et al. 2022

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Aiming to develop a nanoparticle-based optical biosensor using gold nanoparticles (AuNPs) synthesized using green methods and supported by carbon-based nanomaterials, we studied the role of carbon derivatives in promoting AuNPs localized surface plasmon resonance (LSPR), as well as their morphology, dispersion, and stability. Carbon derivatives are expected to work as immobilization platforms for AuNPs, improving their analytical performance. Gold nanoparticles (AuNPs) were prepared using an eco-friendly approach in a single step by reduction of HAuCl4·3H2O using phytochemicals (from tea) which act as both reducing and capping agents. UV–Vis spectroscopy, transmission electron microscopy (TEM), zeta potential (ζ-potential), and X-ray photoelectron spectroscopy (XPS) were used to characterize the AuNPs and nanocomposites. The addition of reduced graphene oxide (rGO) resulted in greater dispersion of AuNPs on the rGO surface compared with carbon-based nanomaterials used as a support. Differences in morphology due to the nature of the carbon support were observed and are discussed here. AuNPs/rGO seem to be the most promising candidates for the development of LSPR biosensors among the three composites we studied (AuNPs/G, AuNPs/GO, and AuNPs/rGO). Simulations based on the Mie scattering theory have been used to outline the effect of the phytochemicals on LSPR, showing that when the presence of the residuals is limited to the formation of a thin capping layer, the quality of the plasmonic resonance is not affected. A further discussion of the application framework is presented.

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“…However, complex preparation processes, relatively high costs, and low energy densities of carbon-based materials (Figure a) have largely impeded their commercial application. − Therefore, it has become an important research topic to develop simple and cost-effective preparation routes to obtain useful porous carbon nanostructures . Especially, thick carbon electrodes with high mass loading and abundant redox-active substances have long been sought as the gold standard to achieve high energy density supercapacitors. − The energy density depends on the mass loading amount of the active materials, such as carbons, , metal oxides/sulfides, , and other composites. − Accordingly, there has been a steep increase in the number of published papers on high mass loading electrodes for supercapacitors in recent years, reflecting the increased research interest and demand from the actual market (Figure b). Despite the fact that electrode materials with low mass loading, which exhibits accelerated electron- and ion-transport kinetics owing to the full surface exposure of active materials, have traditionally been the focus of research, in practical applications, it is more sensible to increase the mass loading of electrode materials as far as possible to meet the commercial standard (Figure c) .…”

Section: Introductionmentioning

confidence: 99%

“…10 Especially, thick carbon electrodes with high mass loading and abundant redox-active substances have long been sought as the gold standard to achieve high energy density supercapacitors. 11−14 The energy density depends on the mass loading amount of the active materials, such as carbons, 15,16 metal oxides/sulfides, 17,18 and other composites. 19−21 Accordingly, there has been a steep increase in the number of published papers on high mass loading electrodes for supercapacitors in recent years, reflecting the increased research interest and demand from the actual market (Figure 1b).…”

Section: Introductionmentioning

confidence: 99%

Inspired by Wood: Thick Electrodes for Supercapacitors

et al. 2023

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The emergence and development of thick electrodes provide an efficient way for the high-energy-density supercapacitor design. Wood is a kind of biomass material with porous hierarchical structure, which has the characteristics of a straight channel, uniform pore structure, good mechanical strength, and easy processing. The wood-inspired low-tortuosity and vertically aligned channel architecture are highly suitable for the construction of thick electrochemical supcapacitor electrodes with high energy densities. This review summarizes the design concepts and processing parameters of thick electrode supercapacitors inspired by natural woods, including wood-based pore structural design regulation, electric double layer capacitances (EDLCs)/pseudocapacitance construction, and electrical conductivity optimization. In addition, the optimization strategies for preparing thick electrodes with wood-like structures (e.g., 3D printing, freeze-drying, and aligned-low tortuosity channels) are also discussed in detail. Further, this review presents current challenges and future trends in the design of thick electrodes for supercapacitors with wood-inspired pore structures. As a guideline, the brilliant blueprint optimization will promote sustainable development of wood-inspired structure design for thick electrodes and broaden the application scopes.

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N-Graphene-Metal-Oxide(Sulfide) hybrid Nanostructures: Single-step plasma-enabled approach for energy storage applications

Cited by 19 publications

References 47 publications

Moving toward Smart Hybrid Vertical Carbon/MoS₂ Binder-Free Electrodes for High-Performing Sodium-Ion Batteries

Moving toward Smart Hybrid Vertical Carbon/MoS₂ Binder-Free Electrodes for High-Performing Sodium-Ion Batteries

Effect of Graphene vs. Reduced Graphene Oxide in Gold Nanoparticles for Optical Biosensors—A Comparative Study

Inspired by Wood: Thick Electrodes for Supercapacitors

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N-Graphene-Metal-Oxide(Sulfide) hybrid Nanostructures: Single-step plasma-enabled approach for energy storage applications

Cited by 19 publications

References 47 publications

Moving toward Smart Hybrid Vertical Carbon/MoS2 Binder-Free Electrodes for High-Performing Sodium-Ion Batteries

Moving toward Smart Hybrid Vertical Carbon/MoS2 Binder-Free Electrodes for High-Performing Sodium-Ion Batteries

Effect of Graphene vs. Reduced Graphene Oxide in Gold Nanoparticles for Optical Biosensors—A Comparative Study

Inspired by Wood: Thick Electrodes for Supercapacitors

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Product

Resources

About

Moving toward Smart Hybrid Vertical Carbon/MoS₂ Binder-Free Electrodes for High-Performing Sodium-Ion Batteries

Moving toward Smart Hybrid Vertical Carbon/MoS₂ Binder-Free Electrodes for High-Performing Sodium-Ion Batteries