WS2 nanoparticles–encapsulated amorphous carbon tubes: A novel electrode material for supercapacitors with a high rate capability

Hu, Bingling; Qin, Xiaoyun; Asiri, Abdullah M.; Alamry, Khalid A.; Al‐Youbi, Abdulrahman O.; Sun, Xuping

doi:10.1016/j.elecom.2012.11.035

Cited by 103 publications

(43 citation statements)

References 17 publications

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“…As for rGO‐MoS 2 electrode, the redox pair is due to the conversion between Mo 4+ and Mo 6+ . Similarly, the redox reaction between W 4+ and W 6+ state is also observed for the rGO‐WS 2 composite ,. For rGO‐MoS 2 ‐WS 2 ‐4 electrode, its redox peaks are well overlapped with those of rGO‐MoS 2 and rGO‐WS 2 electrodes, indicating that each component contributes its capacitance to the mixture electrode.…”

Section: Resultsmentioning

confidence: 72%

Ternary Composite Nanosheets with MoS₂/WS₂/Graphene Heterostructures as High‐Performance Cathode Materials for Supercapacitors

et al. 2018

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A new class of ternary heterostructures consisting of a reduced graphene oxide, molybdenum disulfide, and tungsten disulfide (rGO‐MoS2‐WS2) is prepared through a simple chemical method. According to Raman and X‐ray photoelectron spectroscopy, a MoS2/WS2 heterostructure is uniformly formed on the conductive rGO support. Furthermore, rGO‐MoS2‐WS2 possesses s large surface area of 109 m2 g−1 and a hierarchical pore architecture. When serving as the electrode for supercapacitors, rGO‐MoS2‐WS2 exhibits pseudocapacitive behavior in a KOH solution. It is found that rGO‐MoS2‐WS2 displays a specific capacitance (Cs) of 365 F g−1 at 1 A g−1, which is much higher than those of single TMD (MoS2 or WS2)‐based composites. The enhanced electrochemical performance of rGO‐MoS2‐WS2 is attributed to the lower internal resistance through heterostructure formation, the wide range of TMD oxidation states, and uniform distribution of the few‐layered TMD nanosheets on the rGO surface. Furthermore, the optimal loading amount of MoS2/WS2 heterostructure in the composite is investigated. To demonstrate its practical application, rGO‐MoS2‐WS2 is used as a positive electrode for an asymmetric supercapacitor (ASC). The maximum energy density of the ASC device is 15 Wh kg−1 at a power density of 373 W kg−1. Furthermore, the device remains approximately 70 % of the initial Cs value after 3000 cycles, which shows the excellent cycling stability.

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Section: Resultsmentioning

confidence: 72%

Ternary Composite Nanosheets with MoS₂/WS₂/Graphene Heterostructures as High‐Performance Cathode Materials for Supercapacitors

et al. 2018

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“…It is amazing that, even at the high current density of 10 A g À1 , the high specific capacitance of 655.0 F g À1 is retained, which is much higher than 127.5 F g À1 for g-MnS, and 337 F g À1 for WS 2 /CNT composite in 3 M KOH [9] (ESI S2). This is because the rapid transportation of electrolyte ions in g-MnS/rGO composite, which enhances the rate capability of the electrodes.…”

Section: Electrochemical Behaviors Of G-mns/rgo Compositementioning

confidence: 95%

“…Recent reports show that metal sulfides such as CoS [6], Ag 2 S [7], CuS [8], WS 2 [9], Ni 3 S 2 [10] and NiS [11,12] can be used as promising active materials for pseudocapacitor applications. For example, the composite of Ni 3 S 2 and multiwalled carbon nanotubes exhibits a high specific capacitance of 800 F g À1 at a current density of 3.2 A g À1 [10].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of γ-MnS/rGO composite by facile one-pot solvothermal approach for supercapacitor applications

Shen

et al. 2015

Journal of Power Sources

180

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“…Analogous to graphite, TMDCs consists of graphene like layers of MX 2 sheets (where M can be any metal ions of IV, V and VI group transition elements and X is a chalcogen, X may be S, Se and Te) which are stacked together by weak van der Waals force. Later, different morphologies of MoS 2 -, WS 2 -, and their composite-based materials were investigated as supercapacitor electrodes [12][13][14][15][16][17][18][19][20][21][22][23][24][25] . In 2007, a first report on the electrochemical double-layer capacitance measurement of MoS 2 nanowall films was published by Soon and Loh 11 , which opened up the field of TMDC-based electrode materials for supercapacitor applications.…”

Section: Introductionmentioning

confidence: 99%

Few-layered MoSe₂ nanosheets as an advanced electrode material for supercapacitors

2015

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We report the synthesis of few-layered MoSe2 nanosheets using a facile hydrothermal method and their electrochemical charge storage behavior. A systematic study of the structure and morphology of the as-synthesized MoSe2 nanosheets was performed. The downward peak shift in the Raman spectrum and the high-resolution transmission electron microscopy images confirmed the formation of few-layered nanosheets. The electrochemical energy-storage behavior of MoSe2 nanosheets was also investigated for supercapacitor applications in a symmetric cell configuration. The MoSe2 nanosheet electrode exhibited a maximum specific capacitance of 198.9 F g(-1) and the symmetric device showed 49.7 F g(-1) at a scan rate of 2 mV s(-1). A capacitance retention of approximately 75% was observed even after 10 000 cycles at a high charge-discharge current density of 5 A g(-1). The two-dimensional MoSe2 nanosheets exhibited a high specific capacitance and good cyclic stability, which makes it a promising electrode material for supercapacitor applications.

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WS2 nanoparticles–encapsulated amorphous carbon tubes: A novel electrode material for supercapacitors with a high rate capability

Cited by 103 publications

References 17 publications

Ternary Composite Nanosheets with MoS₂/WS₂/Graphene Heterostructures as High‐Performance Cathode Materials for Supercapacitors

Ternary Composite Nanosheets with MoS₂/WS₂/Graphene Heterostructures as High‐Performance Cathode Materials for Supercapacitors

Fabrication of γ-MnS/rGO composite by facile one-pot solvothermal approach for supercapacitor applications

Few-layered MoSe₂ nanosheets as an advanced electrode material for supercapacitors

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WS2 nanoparticles–encapsulated amorphous carbon tubes: A novel electrode material for supercapacitors with a high rate capability

Cited by 103 publications

References 17 publications

Ternary Composite Nanosheets with MoS2/WS2/Graphene Heterostructures as High‐Performance Cathode Materials for Supercapacitors

Ternary Composite Nanosheets with MoS2/WS2/Graphene Heterostructures as High‐Performance Cathode Materials for Supercapacitors

Fabrication of γ-MnS/rGO composite by facile one-pot solvothermal approach for supercapacitor applications

Few-layered MoSe2 nanosheets as an advanced electrode material for supercapacitors

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Ternary Composite Nanosheets with MoS₂/WS₂/Graphene Heterostructures as High‐Performance Cathode Materials for Supercapacitors

Ternary Composite Nanosheets with MoS₂/WS₂/Graphene Heterostructures as High‐Performance Cathode Materials for Supercapacitors

Few-layered MoSe₂ nanosheets as an advanced electrode material for supercapacitors