2D-2D heterostructure of ionic liquid-exfoliated MoS2/MXene as lithium polysulfide barrier for Li-S batteries

Xie, Fang; Xu, Chunjie; Song, Yaochen; Qi, Liang; Ji, Jinjie; Wang, Sizhe

doi:10.1016/j.jcis.2023.01.031

Cited by 14 publications

(8 citation statements)

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“…Additional references cited within the Supporting Information. [54][55][56][57][58][59][60][61][62][63][64][65][66][67]…”

Section: Ionic Conductivitymentioning

confidence: 99%

Mott‐Schottky MXene@WS₂ Heterostructure: Structural and Thermodynamic Insights and Application in Ultra Stable Lithium−Sulfur Batteries

Wang,

Liu,

Qiao

et al. 2023

ChemSusChem

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Due to the “shuttle effect” and low conversion kinetics of polysulfides, the cycle stability of lithium sulfur (Li−S) battery is unsatisfactory, which hinders its practical application. The Mott‐Schottky heterostructures for Li−S batteries not only provide more catalytic/adsorption active sites, but also facilitate electrons transport by a built‐in electric field, which are both beneficial for polysulfides conversion and long‐term cycle stability. Here, MXene@WS2 heterostructure was constructed by in‐situ hydrothermal growth for separator modification. In‐depth ultraviolet photoelectron spectroscopy and ultraviolet visible diffuse reflectance spectroscopy analysis reveals that there is an energy band difference between MXene and WS2, confirming the heterostructure nature of MXene@WS2. DFT calculations indicate that the Mott‐Schottky MXene@WS2 heterostructure can effectively promote electron transfer, improve the multi‐step cathodic reaction kinetics, and further enhance polysulfides conversion. The built‐in electric field of the heterostructure plays an important role in reducing the energy barrier of polysulfides conversion. Thermodynamic studies reveal the best stability of MXene@WS2 during polysulfides adsorption. As a result, the Li−S battery with MXene@WS2 modified separator exhibits high specific capacity (1613.7 mAh g−1 at 0.1 C) and excellent cycling stability (2000 cycles with 0.0286 % decay per cycle at 2 C). Even at a high sulfur loading of 6.3 mg cm−2, the specific capacity could be retained by 60.0 % after 240 cycles at 0.3 C. This work provides deep structural and thermodynamic insights into MXene@WS2 heterostructure and its promising prospect of application in high performance Li−S batteries.

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“…Additional references cited within the Supporting Information. [54][55][56][57][58][59][60][61][62][63][64][65][66][67]…”

Section: Ionic Conductivitymentioning

confidence: 99%

Mott‐Schottky MXene@WS₂ Heterostructure: Structural and Thermodynamic Insights and Application in Ultra Stable Lithium−Sulfur Batteries

Wang,

Liu,

Qiao

et al. 2023

ChemSusChem

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“…To address these issues, introducing functional intercalation to modify the polypropylene (PP) separator as a barrier and adsorption layer to accelerate the conversion of LiPS was proposed. , The weak affinity of nonpolar carbonaceous materials (e.g., graphene, carbon nanotubes, hollow carbon spheres, etc.) toward LiPS makes it difficult to improve the sulfur utilization. − Therefore, effective catalytic materials with intrinsic polarity were investigated to achieve rapid adsorption-diffusion-conversion of LiPS. , Transition-metal sulfides were demonstrated to be excellent materials for separator modification due to their strong interactions with S 2– /S 2 2– anions .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Binary Transition-Metal Sulfides/MXene Synergistically Promote Polysulfide Adsorption and Conversion in Lithium–Sulfur Batteries

Cui,

Zhou,

Huang

et al. 2023

ACS Appl. Mater. Interfaces

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Currently, severe shuttle effects and sluggish conversion kinetics are the main obstacles to the advancement of lithium−sulfur (Li−S) batteries. Modification of the battery separator by a catalyst is a promising approach to tackle these problems, but simultaneously obtaining rich catalytic active sites, high conductivity, and remarkable stability remains a great challenge. Herein, a flower-like MXene/MoS 2 /SnS@C heterostructure as the functional intercalation of Li−S batteries was prepared for accelerating the synergistic adsorption-electrocatalysis of sulfur conversion. The MXene skeleton constructs a threedimensional conductive network that anchors polysulfides and enhances charge transfer. Meanwhile, the MoS 2 /SnS has rich active sites for accelerating polysulfide conversion, leading to excellent electrochemical performances. A battery with MXene/MoS 2 /SnS@C displays an extraordinary capacity of 836.1 mAh g −1 over 200 cycles at 0.5C and demonstrates a remarkable cycling stability with a capacity attenuation of approximately 0.051% per cycle during 1000 cycles at 2C. When the sulfur loading reaches 5.1 mg cm −2 , the capacity still maintains 722.4 mAh g −1 over 50 cycles. This research proposes a novel strategy to design stable catalysts for Li−S batteries with an extended lifespan.

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“…MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions, or products referred to in the content. In order to tackle above critical obstacles, researchers have extensively investigated the performance improvement of LSBs mainly from four aspects: sulfur cathode, electrolyte, separator, and Li anode [12][13][14][15]. Figure 1 depicts the reaction mechanism of the interconversion of S8 and LiPSs during the charging and discharging, explaining the reasons for the slow reaction kinetics and the mechanism of catalytic LiPSs conversion.…”

Section: Introductionmentioning

confidence: 99%

Status and Prospects of High-Entropy Materials for Lithium–Sulfur Batteries

Yao¹,

Chen²,

Niu³

et al. 2023

Preprint

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The emergence of various electronic devices and equipment such as electric vehicles and drones requires higher energy density energy storage devices. Lithium-sulfur batteries (LSBs) are considered as the most promising new generation energy storage system owing to high theoretical specific capacity and energy density. However, the severe shuttle behaviors of soluble lithium polysulfides (LiPSs) and the slow redox kinetics lead to low sulfur utilization and poor cycling stability, which seriously hinder the commercial application of LSBs. Therefore, various catalytic materials have been employed to solve these troublesome problems. High entropy materials (HEMs), as advanced materials, can provide unique surface and electronic structures that expose plentiful catalytic active sites, which opens new ideas for the regulation of LiPSs redox kinetics. Notwithstanding many instructive reviews in the land of LSBs, while this review aims to offer a complete and shrewd summary of the current progresses in HEMs-based LSBs, including in-depth interpretation of design principles and mechanistic electrocatalysis functions as well as pragmatic perspectives.

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2D-2D heterostructure of ionic liquid-exfoliated MoS2/MXene as lithium polysulfide barrier for Li-S batteries

Cited by 14 publications

References 50 publications

Mott‐Schottky MXene@WS₂ Heterostructure: Structural and Thermodynamic Insights and Application in Ultra Stable Lithium−Sulfur Batteries

Mott‐Schottky MXene@WS₂ Heterostructure: Structural and Thermodynamic Insights and Application in Ultra Stable Lithium−Sulfur Batteries

Binary Transition-Metal Sulfides/MXene Synergistically Promote Polysulfide Adsorption and Conversion in Lithium–Sulfur Batteries

Status and Prospects of High-Entropy Materials for Lithium–Sulfur Batteries

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2D-2D heterostructure of ionic liquid-exfoliated MoS2/MXene as lithium polysulfide barrier for Li-S batteries

Cited by 14 publications

References 50 publications

Mott‐Schottky MXene@WS2 Heterostructure: Structural and Thermodynamic Insights and Application in Ultra Stable Lithium−Sulfur Batteries

Mott‐Schottky MXene@WS2 Heterostructure: Structural and Thermodynamic Insights and Application in Ultra Stable Lithium−Sulfur Batteries

Binary Transition-Metal Sulfides/MXene Synergistically Promote Polysulfide Adsorption and Conversion in Lithium–Sulfur Batteries

Status and Prospects of High-Entropy Materials for Lithium–Sulfur Batteries

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Product

Resources

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Mott‐Schottky MXene@WS₂ Heterostructure: Structural and Thermodynamic Insights and Application in Ultra Stable Lithium−Sulfur Batteries

Mott‐Schottky MXene@WS₂ Heterostructure: Structural and Thermodynamic Insights and Application in Ultra Stable Lithium−Sulfur Batteries