Controlled synthesis of transition metal disulfides (MoS2 and WS2) on carbon fibers: Effects of phase and morphology toward lithium–sulfur battery performance

Eng, Alex Yong Sheng; Cheong, Jian Liang; Lee, Su Seong

doi:10.1016/j.apmt.2019.07.009

Cited by 44 publications

(20 citation statements)

References 44 publications

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“…A variety of electrocatalysts including noble metals, transition-metal compounds, ,,− metal-free catalysts, and their hybrids − ,− have been investigated in Li–S batteries. Among these, transition-metal chalcogenides (TMCs) attract lots of attention as they usually show moderate adsorption ability toward the sulfur-based species and better catalytic activity toward the fast conversion of LiPSs compared with other catalysts. − To gain high catalytic activity, many strategies are used in the modification of TMCs such as etching, doping, morphology modulation, , and phase engineering. , As the catalytic effect mostly depends on the accessible active surface and exposed active sites, − downscaling the size of TMCs is a direct and effective way to further improve their catalytic performance, , but a facile synthesis method is still expected.…”

Section: Introductionmentioning

confidence: 99%

“…34−40 To gain high catalytic activity, many strategies are used in the modification of TMCs such as etching, 41 doping, 42 morphology modulation, 31,43 and phase engineering. 44,45 As the catalytic effect mostly depends on the accessible active surface and exposed active sites, 46−49 downscaling the size of TMCs is a direct and effective way to further improve their catalytic performance, 33,50 but a facile synthesis method is still expected.…”

Section: ■ Introductionmentioning

confidence: 99%

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Graphene-Templated Growth of WS₂ Nanoclusters for Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Xiao

Zhang

Deng

et al. 2020

ACS Appl. Energy Mater.

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The practical application of lithium−sulfur (Li−S) batteries is hindered by poor cycling stability mainly derived from the shuttling of lithium polysulfides (LiPSs). Catalysis, which can promote the fast conversion of LiPSs, is a promising solution to the abovementioned problem. In this work, ultrasmall WS 2 nanoclusters with the size around 2 nm are synthesized, with graphene as the growth template. The ultrasmall WS 2 nanoclusters have abundant exposed edges and numerous unsaturated sulfur sites, which significantly enhance the adsorption ability toward LiPSs and render a high catalytic activity for their fast conversion. In addition, the three-dimensional structure assembled with graphene also provides a highly conductive network and large surface area for the fast conversion of LiPSs. As a result, the Li−S battery using the abovementioned hybrid as a catalytic sulfur host shows a low capacity fading of 0.067% per cycle within 250 cycles at 1 C. With the sulfur loading of 2.7 mg cm −2 , a high capacity retention of 74.7% after 500 cycles is achieved. Overall, this work proposes a promising catalyst design to improve the performance of Li−S batteries.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Graphene-Templated Growth of WS₂ Nanoclusters for Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Xiao

Zhang

Deng

et al. 2020

ACS Appl. Energy Mater.

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“…6b-j) were conducted to reveal that the reactive sites are the edges of MoS 2 , because the edge has more unsaturated sulfur atoms which carry electronegativity for effective adsorption and can promote charge transfer kinetics during the LiPSs transition process, facilitating the conversion from short-chain to long-chain LiPSs with higher electrocatalytic activity (8.53 mA•cm −2 of exfoliated WS 2 ) than that of carbon electrodes (2.52 mA•cm −2 ) [38]. Eng et al [80] controlled the phase (metallic 1T phase or semiconducting 2H phase) and the growing morphology (edge or basal plane orientations) of MoS 2 and WS 2 through different synthetic routes and obtained 1T-edge TMDs, 2H-edge TMDs and 1T-basal TMDs growing on carbon fibers (Fig. 7).…”

Section: Electrocatalysismentioning

confidence: 99%

Applications of transition-metal sulfides in the cathodes of lithium–sulfur batteries

Zuo

Gong

2020

Tungsten

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Lithium-sulfur (Li-S) batteries are considered as one of the most promising candidates for next-generation energy storage systems with high energy density and reliable performance. However, the commercial applications of lithium-sulfur batteries is hindered by several shortcomings like the poor conductivity of sulfur and its reaction products, and the loss of active materials owing to the diffusion of lithium polysulfides (LiPSs) into the electrolyte. Hence, the effective restraining of the LiPSs and the promotion of the sluggish conversion are highly demanded to fulfill the potential of lithium-sulfur batteries. Here, we summarize the applications of transition-metal sulfides (TMSs) in the cathodes over recent years and demonstrate the unique advantages they possess to realize reliable long-life lithium-sulfur batteries.

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“…There are still many researchers studying the application of two-dimensional MoS 2 in Li-S batteries. [38][39][40][41] Many properties of two-dimensional MoS 2 are highly sought aer for application in batteries. Two-dimensional MoS 2 has a large surface area, while maintaining a low size, especially thin-layer MoS 2 , which can provide more active sites, and the electrode materials and electrolyte can fully contact each other.…”

Section: Research Situation Of Mos 2 As a Cathode Materials Of Li-s Bamentioning

confidence: 99%

Application of MoS₂ in the cathode of lithium sulfur batteries

et al. 2020

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Molybdenum disulfide (MoS 2 ) with a two-dimensional layered structure can effectively inhibit the shuttle effect of lithium-sulfur batteries (Li-S batteries). It contains metal-sulfur bonds and combines with polysulfides through electrostatic bonds or chemical bonds. In this paper, the structure and properties of MoS 2 are briefly introduced, and the research progress on the design, preparation, structure and properties of MoS 2 as a cathode material for Li-S batteries in recent years is reviewed. The effects of MoS 2 structure and its composition with carbon materials or metallic oxides on the performance of the electrode materials are analyzed. Finally, the existing problems and possible future research directions are pointed out.

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Controlled synthesis of transition metal disulfides (MoS2 and WS2) on carbon fibers: Effects of phase and morphology toward lithium–sulfur battery performance

Cited by 44 publications

References 44 publications

Graphene-Templated Growth of WS₂ Nanoclusters for Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Graphene-Templated Growth of WS₂ Nanoclusters for Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Applications of transition-metal sulfides in the cathodes of lithium–sulfur batteries

Application of MoS₂ in the cathode of lithium sulfur batteries

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Controlled synthesis of transition metal disulfides (MoS2 and WS2) on carbon fibers: Effects of phase and morphology toward lithium–sulfur battery performance

Cited by 44 publications

References 44 publications

Graphene-Templated Growth of WS2 Nanoclusters for Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Graphene-Templated Growth of WS2 Nanoclusters for Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Applications of transition-metal sulfides in the cathodes of lithium–sulfur batteries

Application of MoS2 in the cathode of lithium sulfur batteries

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Graphene-Templated Growth of WS₂ Nanoclusters for Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Graphene-Templated Growth of WS₂ Nanoclusters for Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Application of MoS₂ in the cathode of lithium sulfur batteries