Uniform MoS2 nanolayer with sulfur vacancy on carbon nanotube networks as binder-free electrodes for asymmetrical supercapacitor

Sun, Peng; Wang, Ruijing; Wang, Qiang; Wang, Huanwen; Wang, Xuefeng

doi:10.1016/j.apsusc.2019.01.007

Cited by 71 publications

(31 citation statements)

References 57 publications

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“…The devices with hydrogel were cycled at 200 mV s −1 up to 3000 scans, showing a capacitance retention of 80%, which could be increased indeed by improving the packaging and sealing. The performances of the two devices are compared in Figure 5 d, with the literature on supercapacitors in which MoS 2 and MnO 2 were employed on steady Ni-foam current collectors and cellulose separator soaked of hydrogel [ 62 ], bendable supercapacitors in which one of the electrodes includes a flexible carbon-based current collector decorated with MoS 2 [ 63 , 64 , 65 , 66 , 67 , 68 , 69 ] with Mn 3 O 4 [ 70 , 71 , 72 , 73 , 74 , 75 ] , or specifically with carbon fibers coated with MnO 2 [ 76 , 77 ]. In particular, at powers from 9000 to 450 W/kg, the device in this study based on liquid electrolyte delivers from 14 to 29 Wh/kg, while that with hydrogel delivers 1 to 31 Wh/kg.…”

Section: Resultsmentioning

confidence: 99%

Binder Free and Flexible Asymmetric Supercapacitor Exploiting Mn3O4 and MoS2 Nanoflakes on Carbon Fibers

et al. 2020

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Emerging technologies, such as portable electronics, have had a huge impact on societal norms, such as access to real time information. To perform these tasks, portable electronic devices need more and more accessories for the processing and dispensation of the data, resulting in higher demand for energy and power. To overcome this problem, a low cost high-performing flexible fiber shaped asymmetric supercapacitor was fabricated, exploiting 3D-spinel manganese oxide Mn3O4 as cathode and 2D molybdenum disulfide MoS2 as anode. These asymmetric supercapacitors with stretched operating voltage window of 1.8 V exhibit high specific capacitance and energy density, good rate capability and cyclic stability after 3000 cycles, with a capacitance retention of more than 80%. This device has also shown an excellent bending stability at different bending conditions.

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Section: Resultsmentioning

confidence: 99%

Binder Free and Flexible Asymmetric Supercapacitor Exploiting Mn3O4 and MoS2 Nanoflakes on Carbon Fibers

et al. 2020

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“…The question arises: How to increase the QC? A number of theoretical works demonstrate that an increase in the QC of carbon materials is possible by the adsorption of metal atoms and some nonmetals on their surface or by creating vacancy defects [15][16][17]. These theoretical results are confirmed by experimental works [18,19], which show that modified CNTs have a much larger capacity in comparison to pure CNTs.…”

Section: Introductionmentioning

confidence: 78%

A New Composite Material on the Base of Carbon Nanotubes and Boron Clusters B12 as the Base for High-Performance Supercapacitor Electrodes

Kolosov

Glukhova

2021

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We explore the quantum capacitance, stability, and electronic properties of single-walled carbon nanotubes decorated with B12 icosahedral boron clusters by first-principle calculation methods implemented in the SIESTA code. After the optimization of the built supercells, the B12 clusters formed bonds with the walls of the carbon nanotubes and demonstrated metallic properties in all cases. The network of carbon nanotubes with its large area and branched surface is able to increase the capacity of the electric double-layer capacity, but the low quantum capacity of each nanotube in this network limits its application in supercapacitors. We found that the addition of boron clusters to both the outer and inner walls increased the quantum capacitance of carbon nanotubes. The calculation of the transmission function near the Fermi energy showed an increase in the conductivity of supercells. It was also found that an increase in the concentration of boron clusters in the structure led to a decrease in the heat of formation that positively affects the stability of supercells. The calculation of the specific charge density showed that with an increase in the boron concentration, the considered material demonstrated the properties of an asymmetric electrode.

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“…At hreefold enhancementi nt he energy density (62.7 Wh kg À1 at 428 Wkg À1 ) is observed on moving to the asymmetricc onfiguration from symmetric, as shown in Figure 8e.T he energy density of the asymmetric cell is highert han MS/NiOjjMS/Fe 2 O 3 (39.6 Wh kg À1 ), [46] NiS/MS k activated carbon (AC) (40 Wh kg À1 ), [47] and MS/NiCo 2 O 4 k AC (18.4 Wh kg À1 ), and is comparable to MS@Ni metal-organicf ramework (MOF) k AC (72.93 Wkg À1 ) [48] and MoS 2Àx @carbonn anotubes (CNTs)/Ni k CNT (63 Wh kg À1 ). [49] Moreover, it displayed an excellent cycling stabilityo f9 8.9 %a fter 10 000 cycles (Figure 8f).…”

Section: Electrochemical Performance Of Mvsmentioning

confidence: 96%

Vanadium‐Incorporated Metallic (1‐T) Molybdenum Sulfide Nanoroses for High‐Energy‐Density Asymmetric Supercapacitors

et al. 2019

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Uniform MoS2 nanolayer with sulfur vacancy on carbon nanotube networks as binder-free electrodes for asymmetrical supercapacitor

Cited by 71 publications

References 57 publications

Binder Free and Flexible Asymmetric Supercapacitor Exploiting Mn3O4 and MoS2 Nanoflakes on Carbon Fibers

Binder Free and Flexible Asymmetric Supercapacitor Exploiting Mn3O4 and MoS2 Nanoflakes on Carbon Fibers

A New Composite Material on the Base of Carbon Nanotubes and Boron Clusters B12 as the Base for High-Performance Supercapacitor Electrodes

Vanadium‐Incorporated Metallic (1‐T) Molybdenum Sulfide Nanoroses for High‐Energy‐Density Asymmetric Supercapacitors

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