Synthesis of Few-Layer MoS2 Nanosheets-Wrapped Polyaniline Hierarchical Nanostructures for Enhanced Electrochemical Capacitance Performance

Lei, Junyu; Jiang, Ziqiao; Lu, Xiaofeng; Nie, Guangdi; Wang, Ce

doi:10.1016/j.electacta.2015.07.028

Cited by 75 publications

(20 citation statements)

References 34 publications

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“…The capacitance after the 2500th cycle is 301 Fg 1 , which is 65 % retention of the initial capacity. A gradual decrease in specific capacity can be from structural damage to an electrode, which increases the electrical resistance of the electrode [32,33].…”

Section: Resultsmentioning

confidence: 99%

Nanoflake NiMoO4 based smart supercapacitor for intelligent power balance monitoring

Chavan

Hou

Ahmed

et al. 2018

Solar Energy Materials and Solar Cells

147

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A supercapacitor is well recognized as one of emerging energy sources for powering electronic devices in our daily life. Although various kind of supercapacitors have been designed and demonstrated, their market aspect could become advanced if the utilisation of other physicochemical properties (e.g. optical) is incorporated in the electrode. Herein, we present an electrochromic supercapacitor (smart supercapacitor) based on a nanoflake NiMoO 4 thin film which is fabricated using a facile and well-controlled successive ionic layer adsorption and reaction (SILAR) technique. The polycrystalline nanoflake NiMoO 4 electrode exhibits a large electrochemically active surface area of ~ 96.3 cm 2. Its nanoporous architecture provides an easy pathway for the intercalation and de-intercalation of ions. The nanoflake NiMoO 4 electrode is dark-brown in the charged state and becomes transparent in the discharged state with a high optical modulation of 57 %. The electrode shows a high specific capacity of 1853 Fg-1 at a current rate of 1Ag-1 with a good coloration efficiency of 31.44 cm 2 /C. Dynamic visual information is obtained when the electrode is charged at different potentials, reflecting the level of energy storage in the device. The device retains 65% capacity after 2500 charge-discharge *Manuscript Click here to view linked References 2 cycles compared with its initial capacity. The excellent performance of the nanoflake NiMoO 4 based smart supercapacitor is associated with the synergetic effect of nanoporous morphology with a large electrochemically active surface area and desired chemical composition for redox reaction.

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Section: Resultsmentioning

confidence: 99%

Nanoflake NiMoO4 based smart supercapacitor for intelligent power balance monitoring

Chavan

Hou

Ahmed

et al. 2018

Solar Energy Materials and Solar Cells

147

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“…42 In summary, the best capacitance values obtained here (350-400 F/g) for 50 nm MoS 2 films are similar to the results from references #40-42 for relatively thick MoS 2 films. Higher capacitance values ranging from 416-589 F/g have been reported for MoS nanocomposites with reduced graphene oxide, 43 carbon nanotubes, 46 porous carbon, 47 polyaniline, 48 and WS 2 and amorphous carbon. 49 In addition, much higher capacitance values up to 1544 F/g have been reported for MoS 2 -Ni 2 S 3 nanocomposites atop porous C and Ni electrodes.…”

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confidence: 93%

Electrodeposition of MoS₂for Charge Storage in Electrochemical Supercapacitors

Falola

Wiltowski

Suni

2016

J. Electrochem. Soc.

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Mo sulfide thin films were cathodically electrodeposited onto glassy carbon electrodes (GCE) from aqueous electrolytes containing 10 mM (NH 4) 2 MoS 4 and 0.2 M KCl. Film adhesion was adequate only for electrodes pretreated by potential cycling in 1.0 M HNO 3 and 0.1 M NaF to enhance the surface roughness and partially oxidize the GCE. Previous studies report direct cathodic electrodeposition of MoS 2 , but energy dispersive x-ray spectroscopy and x-ray diffraction suggest that the as-deposited film is closer in stoichiometry to MoS 3 , which can be converted to MoS 2 by annealing in Ar at 600°C for one hour. The charge storage capability of electrodeposited Mo sulfide films is studied here for the first time in 1.0 M Na 2 SO 4 over the thickness range 50 nm to 5 µm, and before and after high temperature annealing. The highest

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“…1e, f), the peaks of binding energies at 233.4 and 230.5 eV are attributed to Mo 3d 3/2 and Mo 3d 5/2 of Mo 4+ ions, respectively. And S 2p 1/2 , S 2p 3/2 peaks appeared at 163.1 and 161.9 eV, respectively, which indicates the presence of S 2− ligand [32]. The peak of S 2 s at 226.0 eV is also observed.…”

Section: Resultsmentioning

confidence: 66%

Spectrophotometric determination of mercury(II) ions based on their stimulation effect on the peroxidase-like activity of molybdenum disulfide nanosheets

Lü

et al. 2016

Microchim Acta

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The authors describe a colorimetric method for the determination of Hg(II) ions by exploiting the peroxidase-lile activity of few-layered MoS 2 nanosheets (MoS2-NSs). These were prepared by sonication-induced exfoliation of bulk MoS 2 crystals in aqueous surfactant solution. The MoS2-NSs were found to acts as a peroxidase mimic that is capable of oxidizing the substrate 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2) to give a blue product with an absorption maximum at 652 nm. The addition of Hg(II) strongly accelerates the kinetics of this reaction. It is shown that the enzyme mimic possesses a high affinity for TMB and a lower pseudo-Michaelis-Menten constant. The stimulating effect of Hg(II) is seriously influenced by the change of surface charge. The use of nanosheets covered with (negatively charged) polystyrene sulfonate results in a decrease in the formation of blue dye, while those covered with (cationic) poly(diallyldimethyl ammonium) ions cause a small increase. Under optimal conditions, the peroxidase-like activity of MoS2-NSs is affected by Hg(II) in the 2.0 to 200 μM concentration range. The method has a detection limit (LOD) of 0.5 μM which is much below the allowed level in cosmetics (1 ppm; ca. 5 μM). The method display excellent sensitivity, selectivity and stability. It was applied to the determination of total mercury in cosmetic samples, and results compared well with results obtained by ICP-AES.

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Synthesis of Few-Layer MoS2 Nanosheets-Wrapped Polyaniline Hierarchical Nanostructures for Enhanced Electrochemical Capacitance Performance

Cited by 75 publications

References 34 publications

Nanoflake NiMoO4 based smart supercapacitor for intelligent power balance monitoring

Nanoflake NiMoO4 based smart supercapacitor for intelligent power balance monitoring

Electrodeposition of MoS₂for Charge Storage in Electrochemical Supercapacitors

Spectrophotometric determination of mercury(II) ions based on their stimulation effect on the peroxidase-like activity of molybdenum disulfide nanosheets

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Synthesis of Few-Layer MoS2 Nanosheets-Wrapped Polyaniline Hierarchical Nanostructures for Enhanced Electrochemical Capacitance Performance

Cited by 75 publications

References 34 publications

Nanoflake NiMoO4 based smart supercapacitor for intelligent power balance monitoring

Nanoflake NiMoO4 based smart supercapacitor for intelligent power balance monitoring

Electrodeposition of MoS2for Charge Storage in Electrochemical Supercapacitors

Spectrophotometric determination of mercury(II) ions based on their stimulation effect on the peroxidase-like activity of molybdenum disulfide nanosheets

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Electrodeposition of MoS₂for Charge Storage in Electrochemical Supercapacitors