A scalable sulfuration of WS2 to improve cyclability and capability of lithium-ion batteries

Zhou, Liyan; Yan, Shancheng; Pan, Lijia; Wang, Xinran; Wang, Yuqiao; Shi, Yi

doi:10.1007/s12274-015-0966-9

Cited by 62 publications

(46 citation statements)

References 17 publications

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“…S peaks (2p 3/2 at~161.2 eV and 2p 1/2 at~162.4 eV) in Figure 2c are attributed to the −2 valence state of S atoms. Our XPS results agree well with the reported values in our previous work [20,22], showing that QDs have the same chemical composition as the bulk materials. …”

Section: X-ray Photoelectron Spectroscopysupporting

confidence: 92%

“…However, defect-free WS 2 has been difficult to obtain, and imperfections including sulfur vacancy defects and oxidized impurities may strongly affect the transport properties of the materials [16,17]. In our previous work, we have developed a facile low-temperature thiol chemistry route to repair the sulfur vacancies and improve the electrical properties [18][19][20]. Such a route may hinder the photo-generated electron-hole recombination and improve the photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

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Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Zhou

Yan

et al. 2017

Catalysts

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Two-dimensional transition metal dichalcogenides, such as tungsten disulfide (WS 2 ), have been actively studied as suitable candidates for photocatalysts due to their unique structural and electronic properties. The presence of active sites at the edges and the higher specific surface area of these materials are crucial to the photocatalytic activity of the hydrogen evolution reaction. Here, WS 2 quantum dots (QDs) have been successfully synthesized by using a combination of grinding and sonication techniques. The morphology of the QDs was observed, using transmission electron microscopy and an atomic force microscope, to have uniform sizes of less than 5 nm. Photoelectrochemical (PEC) measurements show that the current density of WS 2 QDs under illumination is almost two times higher than that of pristine WS 2 . Furthermore, these high-quality WS 2 QDs may have various applications in optoelectronics, solar cells, and biomedicine.

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Section: X-ray Photoelectron Spectroscopysupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Zhou

Yan

et al. 2017

Catalysts

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“…Conversely, the metallic W remains almost inactive in the LIB system. The electrode operates through reversible conversion of the S 2− /S 0 redox couple according to the reaction 2Li 2 S↔2S+4Li + +4e − . In both battery systems, the electrochemical reactions involve the transport of four electrons, which results in a similar theoretical capacity of 432 mA h g −1 for both LIBs and SIBs.…”

Section: Introductionmentioning

confidence: 99%

Improved Lithium‐Ion and Sodium‐Ion Storage Properties from Few‐Layered WS₂ Nanosheets Embedded in a Mesoporous CMK‐3 Matrix

Pang

Gao

Zhao

et al. 2017

Chemistry A European J

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An integrated WS @CMK-3 nanocomposite has been prepared by a one-step hydrothermal method and then used as the anode material for lithium-ion and sodium-ion batteries. Ultrathin WS nanosheets have been successfully embedded into the ordered mesoporous carbon (CMK-3) framework. Owing to the few-layered nanostructure of WS , as well as the high electronic conductivity and the volume confinement effect of CMK-3, the material shows larger discharge capacity, better rate capability, and improved cycle stability than pristine WS . When tested in lithium-ion batteries, the material delivers a reversible capacity of 720 mA h g after 100 cycles at a current density of 100 mA g . A large discharge capacity of 307 mA h g is obtained at a current density of 2 A g . When used in sodium-ion batteries, the material exhibits a capacity of 333 mA h g at 100 mA g without capacity fading after 70 cycles. A discharge capacity of 230 mA h g is obtained at 2 A g . This excellent performance demonstrates that the WS @CMK-3 nanocomposite has great potential as a high-performance anode material for next-generation rechargeable batteries.

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“…WS 2 as a member of the layered transition metal dichalcogenides (LTMDs) has received tremendous attention owing to its high specific capacity (ca. 433 mAh⋅g −1 based on 4 mol of Li + insertion) and good lithium storage performance. It is composed of S‐W‐S layers stacked together through weak Van der Waals interactions during the process of facile insertion and extraction of Li + .…”

Section: Introductionmentioning

confidence: 99%

“…So, if we change the disordered arrangement of WS 2 for WS 2 layers‐based nanocomposites to orderly one, what would happen? Moreover, it is still difficult to obtain pure WS 2 in a green, cost‐effective and easy way . The impurities directly affect the electrochemical performance for reversible lithium storage.…”

Section: Introductionmentioning

confidence: 99%

Multilayer‐Cake WS₂/C Nanocomposite as a High‐Performance Anode Material for Lithium‐Ion Batteries: “Regular” and “Alternate”

et al. 2017

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A multilayer‐cake WS2/C nanocomposite was successfully synthesized through an intercalation‐transformation method, in which few‐layered WS2 and carbon were sandwiched in an alternating sequence. As a benefit of the electronic conductivity enhanced by the interlayer carbon and the unique “regular” and “alternate” architecture, the WS2/C nanocomposite showed promising performance as an anode material for lithium‐ion batteries. The nanocomposite demonstrated a high capacity of 829.4 mAh⋅g−1 at 0.3 A⋅g−1 after 140 cycles and it could still deliver a stable capacity of about 326.8 mAh⋅g−1 at a current density of 8.0 A⋅g−1.

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A scalable sulfuration of WS2 to improve cyclability and capability of lithium-ion batteries

Cited by 62 publications

References 17 publications

Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Improved Lithium‐Ion and Sodium‐Ion Storage Properties from Few‐Layered WS₂ Nanosheets Embedded in a Mesoporous CMK‐3 Matrix

Multilayer‐Cake WS₂/C Nanocomposite as a High‐Performance Anode Material for Lithium‐Ion Batteries: “Regular” and “Alternate”

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A scalable sulfuration of WS2 to improve cyclability and capability of lithium-ion batteries

Cited by 62 publications

References 17 publications

Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Improved Lithium‐Ion and Sodium‐Ion Storage Properties from Few‐Layered WS2 Nanosheets Embedded in a Mesoporous CMK‐3 Matrix

Multilayer‐Cake WS2/C Nanocomposite as a High‐Performance Anode Material for Lithium‐Ion Batteries: “Regular” and “Alternate”

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Product

Resources

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Improved Lithium‐Ion and Sodium‐Ion Storage Properties from Few‐Layered WS₂ Nanosheets Embedded in a Mesoporous CMK‐3 Matrix

Multilayer‐Cake WS₂/C Nanocomposite as a High‐Performance Anode Material for Lithium‐Ion Batteries: “Regular” and “Alternate”