Directly deposited MoS<sub>2</sub>thin film electrodes for high performance supercapacitors

Choudhary, Nitin; Patel, Mumukshu D.; Ho, Yee‐Hsien; Dahotre, Narendra B.; Lee, Wonki; Hwang, Jun Yeon; Choi, Wonbong

doi:10.1039/c5ta08095a

Cited by 151 publications

(79 citation statements)

References 39 publications

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“…[23][24][25][26][27][28][29] The high electrical conductivity of metal sulde offers faster charge transfer than its corresponding oxide/hydroxides, which improve the electrochemical performance of an electrode in terms of C s , energy density, and power density. Therefore, it is important to synthesize highly conductive and low-cost metal suldes that exhibit excellent supercapacitive behavior as a positive electrode in ASCs.…”

Section: -14mentioning

confidence: 99%

Modified chemical synthesis of MnS nanoclusters on nickel foam for high performance all-solid-state asymmetric supercapacitors

et al. 2017

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Novel MnS nanoclusters were synthesized on nickel foam (NF) using a successive ionic layer adsorption and reaction (SILAR) method. MnS nanoclusters with different sizes were obtained by varying the number of deposition cycles. The crystal structure, chemical composition, and surface microstructure of the electrodes were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, and high resolution transmission electron microscopy. The electrochemical behavior of the MnS nanoclusters was examined by cyclic voltammetry, galvanostatic charge-discharge, cycling test, and electrochemical impedance spectroscopy. The MnS nanoclusters prepared with 90 SILAR cycles showed the best supercapacitance in a 6 M KOH aqueous electrolyte with a specific capacitance of 828 F g À1 at a scan rate of 5 mV s À1 and cycling stability of 85.2% after 5000 charge-discharge cycles.Moreover, an asymmetric supercapacitor (ASC) was assembled with the as-prepared MnS electrode on NF as the positive electrode, hydrothermally prepared reduced graphene oxide (rGO) on NF as the negative electrode, and PVA-KOH gel as the electrolyte. The MnS@NF//rGO@NF ASC showed excellent electrochemical performance with maximum energy and power densities of 34.1 W h kg À1 and 12.8 kW kg À1, respectively. The ASC also showed a capacitive retention of 86.5% after 2000 charge-discharge cycles, highlighting its practical application for energy storage.

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Section: -14mentioning

confidence: 99%

Modified chemical synthesis of MnS nanoclusters on nickel foam for high performance all-solid-state asymmetric supercapacitors

et al. 2017

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“…3a displays the CV curves of hexapod-like NiSe 2 at different scan rates in the potential range from À 0.1 V to þ0.4 V. A quasi rectangular curve is observed, indicating the existence of dual behavior, i.e. electric double layer capacitance (EDLC) and a weak pseudocapacitance of synthesized NiSe 2 [23,24]. The specific capacitance estimated from CV curves is found to be higher at lower scan rates and vice-versa (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…3e). A straight line without semi-circle is observed, indicating the fast adsorption of ions due to the dominance of EDLC than pseudocapacitance behavior in hexapod-like NiSe 2 electrode [23]. The intercept of the straight line with the real axis gives the value of equivalent series resistance (ESR) and it is the contribution of electrolyte resistance, contact resistance at electrode-current collector interface and intrinsic resistance of electrode material [24].…”

Section: Methodsmentioning

confidence: 99%

Facile hydrothermal synthesis of hexapod-like two dimensional dichalcogenide NiSe2 for supercapacitor

Narayanasamy

Han

2016

Materials Letters

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“…Thus the ASC systems using carbon materials as negative electrode suffer from restricted improvement of energy density attributed to the unsatisfied capacitance of carbon materials in aqueous electrolyte especially in neutral solution. [28][29][30][31][32][33][34][35][36][37][38] In this work, we present a facile method to prepare MoS 2 /GNS hybrid by using a simple hydrothermal approach. 26,27 Recently, various MoS 2 nanosheets have been synthesized and used as electrodes of supercapacitors and display excellent performance in wide, negative potential in neutral electrolyte, such as high specific capacitance and rate performance, which further promote the MoS 2 nanosheets to be a promising electrode material, especially as the negative electrode material in ASC devices.…”

Section: Introductionmentioning

confidence: 99%

A high energy density all-solid-state asymmetric supercapacitor based on MoS₂/graphene nanosheets and MnO₂/graphene hybrid electrodes

et al. 2016

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An asymmetric supercapacitor (ASC) with high energy density is designed using flower-like MoS 2 and MnO 2 grown on graphene nanosheets (GNS) as negative and positive electrodes, respectively. In this paper, flowerlike MoS 2 /GNS and MnO 2 /GNS were controllably synthesized through a hydrothermal approach. The prepared MoS 2 /GNS hybrid displays a typical crinkly and rippled structure with ultrathin MoS 2 nanosheets uniformly grown on the surface of graphene. Additionally, the MoS 2 /GNS electrode exhibits superior electrochemical performance, such as high specific capacitance (320 F g -1 at 2 A g -1 ). The MoS 2 /GNS holds great promise as a negative electrode for an ASC due to its high specific capacitance and wide operation window in negative potential. The assembled all-solid-state ASC delivers a remarkable energy density of 78.9 Wh kg -1 at a power density of 284.1 W kg -1 . Thus the MoS 2 /GNS hybrid is a promising electrode material for next-generation storage systems.Subsequently, 5 mL of L-cysteine solution (160 mg mL -1 ) was dropwised into the above solution. Finally, it was transferred into a 50 mL Teflon-lined stainless steel autoclave, which was sealed and heated in an oven at 180 °C for 12 h. During the hydrothermal approach, L-cysteine will decompose and release S 2ions, acting as the sulfur source. Additionally, L-cysteine is the reducing agent for the formation of MoS 2 , because that the Mo (VI) will be reduced to Mo(IV) by L-cysteine. The product were collected by centrifugation, washed with deionized water and ethanol for several times and vacuum dried at 60 °C for 24 h. The final product was loaded into the tube furnace and calcined in N 2 atmosphere at 550 °C for 2 h. For comparison, bare MoS 2 and the samples with various ratio of MoS 2 to GNS were also prepared under the same condition. Preparation of MnO 2 /GNS hybrid170 mL of KMnO 4 aqueous solution (0.34 mg mL -1 ) was added into 32 mL of GNS dispersion (1.6 mg mL -1 ) and the above solution was maintained at 65 °C for 24 h under stirring. After it was cooled to room temperature, the precipitate was collected by centrifuge, washed with ethanol and deionized water and dried in vacuum oven at 100 °C for 12 h. Bare MnO 2 samples were also prepared for comparison. MnO 2 -1 was obtained by thermal treatment of MnO 2 /GNS at 400 °C in air to remove the GNS.Another bare MnO 2 sample (MnO 2 -2) was prepared through the oxidation-reduction reaction between KMnO 4 and ethyl alcohol according to our previously work. 40 Characterization methodsX-ray diffraction (XRD) equipped with Cu Kα radiation (λ = 0.15406 nm) was used to characterize the crystallographic structures of the materials. X-ray photoelectron spectrometer (XPS) analysis was performed using nonmonochromatic,

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Directly deposited MoS₂thin film electrodes for high performance supercapacitors

Abstract: We demonstrate the direct deposition of two-dimensional (2D) MoS2thin film on Cu-foil and polymer substrates, exhibiting an excellent capacitance and outstanding cyclic stability. The MoS2based supercapacitors will enable new opportunities in flexible electronics and energy devices.

Cited by 151 publications

References 39 publications

Modified chemical synthesis of MnS nanoclusters on nickel foam for high performance all-solid-state asymmetric supercapacitors

Modified chemical synthesis of MnS nanoclusters on nickel foam for high performance all-solid-state asymmetric supercapacitors

Facile hydrothermal synthesis of hexapod-like two dimensional dichalcogenide NiSe2 for supercapacitor

A high energy density all-solid-state asymmetric supercapacitor based on MoS₂/graphene nanosheets and MnO₂/graphene hybrid electrodes

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Directly deposited MoS2thin film electrodes for high performance supercapacitors

Abstract: We demonstrate the direct deposition of two-dimensional (2D) MoS2thin film on Cu-foil and polymer substrates, exhibiting an excellent capacitance and outstanding cyclic stability. The MoS2based supercapacitors will enable new opportunities in flexible electronics and energy devices.

Cited by 151 publications

References 39 publications

Modified chemical synthesis of MnS nanoclusters on nickel foam for high performance all-solid-state asymmetric supercapacitors

Modified chemical synthesis of MnS nanoclusters on nickel foam for high performance all-solid-state asymmetric supercapacitors

Facile hydrothermal synthesis of hexapod-like two dimensional dichalcogenide NiSe2 for supercapacitor

A high energy density all-solid-state asymmetric supercapacitor based on MoS2/graphene nanosheets and MnO2/graphene hybrid electrodes

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Product

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About

Directly deposited MoS₂thin film electrodes for high performance supercapacitors

A high energy density all-solid-state asymmetric supercapacitor based on MoS₂/graphene nanosheets and MnO₂/graphene hybrid electrodes