Binder-free WS<sub>2</sub> nanosheets with enhanced crystallinity as a stable negative electrode for flexible asymmetric supercapacitors

Liu, Si; Zeng, Yinxiang; Zhang, Min; Xie, Shilei; Tong, Yexiang; Cheng, Faliang; Lu, Xihong

doi:10.1039/c7ta07009h

Cited by 89 publications

(46 citation statements)

References 58 publications

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“…With respect to solid‐state supercapacitors, binder‐free WS 2 nanosheets carbon fibers composite were synthesized by hydrothermal method and electrochemically studied in polyvinyl alcohol (PVA)/LiCl gel electrolyte by Liu et al. Regarding the electrolyte, its synthesis employed PVA and LiCl in aqueous solution, which subsequently was applied in electrodes and separator; and dried until and solidified at room temperature . In this work, after 10 000 cycles the material presented capacitance retention of 82 %, with specific areal capacitance of 0.93 F cm −2 at 4 mA cm −2 .…”

Section: Energy Storage Applicationssupporting

confidence: 64%

TMDs beyond MoS₂ for Electrochemical Energy Storage

Soares

Mukherjee

Singh

2020

Chemistry A European J

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Atomically thin sheets of two‐dimensional (2D) transition metal dichalcogenides (TMDs) have attracted interest as high capacity electrode materials for electrochemical energy storage devices owing to their unique properties (high surface area, high strength and modulus, faster ion diffusion, and so on), which arise from their layered morphology and diversified chemistry. Nevertheless, low electronic conductivity, poor cycling stability, large structural changes during metal‐ion insertion/extraction along with high cost of manufacture are challenges that require further research in order for TMDs to find use in commercial batteries and supercapacitors. Here, a systematic review of cutting‐edge research focused on TMD materials beyond the widely studied molybdenum disulfide or MoS2 electrode is reported. Accordingly, a critical overview of the recent progress concerning synthesis methods, physicochemical and electrochemical properties is given. Trends and opportunities that may contribute to state‐of‐the‐art research are also discussed.

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Section: Energy Storage Applicationssupporting

confidence: 64%

TMDs beyond MoS₂ for Electrochemical Energy Storage

Soares

Mukherjee

Singh

2020

Chemistry A European J

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“…Owing to the 2D morphology, only small structural changes occurred during the charge‐storage process compared to the bulk ones, thus making the 2D materials exhibit both high energy and power density. In addition, Lu et al utilized high‐quality semiconducting tungsten disulfide (WS 2 ) nanosheets to fabricate stable negative electrodes . The durability of WS 2 nanosheets was demonstrated owing to the improved crystallinity.…”

Section: Pristine 2d Materials For Micro‐supercapacitorsmentioning

confidence: 99%

Engineering 2D Architectures toward High‐Performance Micro‐Supercapacitors

et al. 2018

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The rise of micro-supercapacitors is satisfying the demand for power storage in portable devices and wireless gadgets. But the miniaturization of the energy-storage components is significantly limited by their energy density. Electrode materials with adequate electrochemical active surfaces are therefore required for improving performance. 2D materials with ultralarge specific surface areas offer a broad portfolio of the development of high-performance micro-supercapacitors in spite of their several critical drawbacks. An architecture engineering strategy is therefore developed to break these natural limits and maximize the significant advantages of these materials. Based on the approaches of phase transformation, intercalation, surface modification, material hybridization, and hierarchical structuration, 2D architectures with improved conductivity, enlarged specific surface, enhanced redox activity, as well as the unique synergetic effect exhibit great promise in the application of miniaturized supercapacitors with highly enhanced performance. Herein, the architecture engineering of emerging 2D materials beyond graphene toward optimizing the performance of micro-supercapacitors is discussed, in order to promote the application of 2D architectures in miniaturized energy-storage devices.

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“…The Raman spectra of the WS 2 and Ni(OH) 2 /WS 2 samples are shown in Figure S5, Supporting Information. Two characteristic peaks of WS 2 located at 349 and 417 cm −1 are observed, which correspond to the in‐plane longitudinal acoustic mode LA(M) and the out‐of‐plane vibrational mode (A 1g ) of the W–S stretching . Two characteristic peaks of Ni(OH) 2 can be observed at 512 and 574 cm −1 .…”

Section: Resultsmentioning

confidence: 91%

3D Mesoporous Ni(OH)₂/WS₂ Nanofibers with Highly Enhanced Performances for Hybrid Supercapacitors

Jiang

Dai

et al. 2019

Energy Tech

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3D Ni(OH)2/tungsten disulfide (WS2) nanofibers composed of ultrathin nanoflakes are synthesized by electrospinning followed by a hydrothermal process, which have a large specific surface of 64.56 m2 g−1. When tested in a three‐electrode configuration, the WS2/Ni(OH)2 nanofiber‐based electrode exhibits a high specific capacity of 354 C g−1 at a current density of 1 A g−1. The hybrid storage device, in which WS2/Ni(OH)2 nanofibers and graphene are used as the positive and negative electrodes, respectively, exhibits a high energy density of 34 Wh kg−1 at a power density of 940 W kg−1 and a high capacity retention of 83% after 4000 cycles at 4 A g−1. The as‐synthesized 3D Ni(OH)2/WS2 nanofibers provide a way for the WS2 nanostructure to optimize its viability and potential in constructing a high‐performance energy storage device.

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Binder-free WS₂ nanosheets with enhanced crystallinity as a stable negative electrode for flexible asymmetric supercapacitors

Abstract: Tungsten disulfide (WS2) has been emerging as an attractive electrode material for supercapacitors because of its intrinsically layered structure and high capacitance.

Cited by 89 publications

References 58 publications

TMDs beyond MoS₂ for Electrochemical Energy Storage

TMDs beyond MoS₂ for Electrochemical Energy Storage

Engineering 2D Architectures toward High‐Performance Micro‐Supercapacitors

3D Mesoporous Ni(OH)₂/WS₂ Nanofibers with Highly Enhanced Performances for Hybrid Supercapacitors

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Binder-free WS2 nanosheets with enhanced crystallinity as a stable negative electrode for flexible asymmetric supercapacitors

Abstract: Tungsten disulfide (WS2) has been emerging as an attractive electrode material for supercapacitors because of its intrinsically layered structure and high capacitance.

Cited by 89 publications

References 58 publications

TMDs beyond MoS2 for Electrochemical Energy Storage

TMDs beyond MoS2 for Electrochemical Energy Storage

Engineering 2D Architectures toward High‐Performance Micro‐Supercapacitors

3D Mesoporous Ni(OH)2/WS2 Nanofibers with Highly Enhanced Performances for Hybrid Supercapacitors

Contact Info

Product

Resources

About

Binder-free WS₂ nanosheets with enhanced crystallinity as a stable negative electrode for flexible asymmetric supercapacitors

TMDs beyond MoS₂ for Electrochemical Energy Storage

TMDs beyond MoS₂ for Electrochemical Energy Storage

3D Mesoporous Ni(OH)₂/WS₂ Nanofibers with Highly Enhanced Performances for Hybrid Supercapacitors