Efficient polysulfide blocker from conductive niobium nitride@graphene for Li-S batteries

Shi, Heng; Sun, Zhenhua; Lv, Wei; Xiao, Shujie; Yang, Huijing; Shi, Ying; Chen, Ke; Wang, S.G.; Zhang, Bingseng; Yang, Quan‐Hong; Li, Feng

doi:10.1016/j.jechem.2019.10.018

Cited by 74 publications

(31 citation statements)

References 45 publications

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“…Figure 6g and Table S2, Supporting Information displays a comparison of several parameters of state‐of‐the‐art Nb‐based and carbon‐based materials as cathode hosts for LSBs. [ 15,16,42,43,54,65–69 ] Notice that the C 2 N@NbSe 2 host presented here is characterized by the highest capacities and stabilities. Finally, to illustrate the promising practical application of LSBs based on C 2 N@NbSe 2 /S cathodes, Figure 6f shows how two C 2 N@NbSe 2 /S‐based coin cells in series were used to light up a “2021”‐shaped LED panel containing 60 LEDs.…”

Section: Resultsmentioning

confidence: 94%

“…[ 11,12 ] Alternatively, transition metal selenides characterized by higher electrical conductivities and similar surface polarity have been engineered as ideal sulfur hosts in LSBs. [ 13,14 ] Among transition metals, owing to their high polysulfide adsorption and catalytic conversion activity, Nb‐based materials, like Nb 2 O 5 or NbN, [ 15,16 ] have recently received much interest. Surprisingly, despite its high potential, niobium selenide (NbSe 2 ), which has raised notable attention in numerous electrocatalytic reactions, has not yet been investigated as a cathode host material in LSBs.…”

Section: Introductionmentioning

confidence: 99%

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NbSe₂ Meets C₂N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries

Yang

Liang

Zhang

et al. 2021

Advanced Energy Materials

109

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The shuttle effect and sluggish conversion kinetics of lithium polysulfides (LiPS) hamper the practical application of lithium–sulfur batteries (LSBs). Toward overcoming these limitations, herein an in situ grown C2N@NbSe2 heterostructure is presented with remarkable specific surface area, as a Li–S catalyst and LiPS absorber. Density functional theory (DFT) calculations and experimental results comprehensively demonstrate that C2N@NbSe2 is characterized by a suitable electronic structure and charge rearrangement that strongly accelerates the LiPS electrocatalytic conversion. In addition, heterostructured C2N@NbSe2 strongly interacts with LiPS species, confining them at the cathode. As a result, LSBs cathodes based on C2N@NbSe2/S exhibit a high initial capacity of 1545 mAh g−1 at 0.1 C. Even more excitingly, C2N@NbSe2/S cathodes are characterized by impressive cycling stability with only 0.012% capacity decay per cycle after 2000 cycles at 3 C. Even at a sulfur loading of 5.6 mg cm−2, a high areal capacity of 5.65 mAh cm−2 is delivered. These results demonstrate that C2N@NbSe2 heterostructures can act as multifunctional polysulfide mediators to chemically adsorb LiPS, accelerate Li‐ion diffusion, chemically catalyze LiPS conversion, and lower the energy barrier for Li2S precipitation/decomposition, realizing the “adsorption‐diffusion‐conversion” of polysulfides.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

NbSe₂ Meets C₂N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries

Yang

Liang

Zhang

et al. 2021

Advanced Energy Materials

109

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“…The composite coating with polarity and a highly conductive carbon materials becomes a more reasonable designing strategy for separator modification. In situ NbN/ graphene [21] (Figure 2c), Co 9 S 8 /CoO-graphene [22] and NiCo 2 S 4 @rGO [3] all were used as modified layers to coat the [11]. Copyright 2018 Elsevier BV).…”

Section: Separators and Electrodesmentioning

confidence: 99%

Recent Progress in High‐Performance Lithium Sulfur Batteries: The Emerging Strategies for Advanced Separators/Electrolytes Based on Nanomaterials and Corresponding Interfaces

Wang

Deng

Wei

et al. 2021

Chemistry An Asian Journal

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Lithium-sulfur (LiÀ S) batteries, possessing excellent theoretical capacities, low cost and nontoxicity, are one of the most promising energy storage battery systems. However, poor conductivity of elemental S and the "shuttle effect" of lithium polysulfides hinder the commercialization of LiÀ S batteries. These problems are closely related to the interface problems between the cathodes, separators/electrolytes and anodes. The review focuses on interface issues for advanced separators/electrolytes based on nanomaterials in LiÀ S batteries. In the liquid electrolyte systems, electrolytes/separators and electrodes system can be decorated by nano materials coating for separators and electrospinning nanofiber separators. And, interface of anodes and electrolytes/ separators can be modified by nano surface coating, nano composite metal lithium and lithium nano alloy, while the interface between cathodes and electrolytes/separators is designed by nano metal sulfide, nanocarbon-based and other nano materials. In all solid-state electrolyte systems, the focus is to increase the ionic conductivity of the solid electrolytes and reduce the resistance in the cathode/polymer electrolyte and Li/electrolyte interfaces through using nanomaterials. The basic mechanism of these interface problems and the corresponding electrochemical performance are discussed. Based on the most critical factors of the interfaces, we provide some insights on nanomaterials in high-performance liquid or state LiÀ S batteries in the future.

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“…Additional references cited with the Supporting Information. [62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80]…”

Section: Supporting Informationmentioning

confidence: 99%

A Synergistic Strategy with 3D Highly Conductive Carbon Matrix‐Decorated with Low Loading of CdS Quantum Dots as a Sulfur Host for Advanced Li−S Batteries

et al. 2021

ChemElectroChem

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Lithium-sulfur batteries (LSBs) have become one of the most competitive candidates for next generation energy storage systems due to the high theoretical energy density, nevertheless, the severe shuttle effect, volume expansion, and poor electrical conductivity restrict their practical application. Herein, we report a synergistic combination of 3D carbon matrix (CdS@NG-CNT) composed of low-defect carbon nanotubes (CNTs) and nitrogen-doped graphene (NG) decorated with low loading of cadmium sulfide quantum dots as sulfur host and carbon black (CB) as separator layer to collectively solve these issues. Specifically, the developed host material possesses abundant macropores and mesopores and high electrical conductivity, which endow the carbon matrix multifaceted structural properties for polysulfides immobilization, electrons/ Li + transfer, and Li 2 S formation, as well as buffering the volume expansion during cycling. The CB-modified separator can help to enhance the interconversion of intercepted polysulfides. Benefiting from these aspects, the cell equipped with CdS@NG-CNT/S//CB-PP exhibits a superior rate capacity of 1493.6 mA h/g at 0.2 C (1 st ), and maintains a capacity of 479.7 mA h/g after 1050 cycles with an ultralow capacity decay rate of 0.051 % at 1.0 C. This work provides a useful strategy to solve issues of the current LSBs, which may practically be used in the high-energy density.

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Efficient polysulfide blocker from conductive niobium nitride@graphene for Li-S batteries

Cited by 74 publications

References 45 publications

NbSe₂ Meets C₂N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries

NbSe₂ Meets C₂N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries

Recent Progress in High‐Performance Lithium Sulfur Batteries: The Emerging Strategies for Advanced Separators/Electrolytes Based on Nanomaterials and Corresponding Interfaces

A Synergistic Strategy with 3D Highly Conductive Carbon Matrix‐Decorated with Low Loading of CdS Quantum Dots as a Sulfur Host for Advanced Li−S Batteries

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Efficient polysulfide blocker from conductive niobium nitride@graphene for Li-S batteries

Cited by 74 publications

References 45 publications

NbSe2 Meets C2N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries

NbSe2 Meets C2N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries

Recent Progress in High‐Performance Lithium Sulfur Batteries: The Emerging Strategies for Advanced Separators/Electrolytes Based on Nanomaterials and Corresponding Interfaces

A Synergistic Strategy with 3D Highly Conductive Carbon Matrix‐Decorated with Low Loading of CdS Quantum Dots as a Sulfur Host for Advanced Li−S Batteries

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NbSe₂ Meets C₂N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries

NbSe₂ Meets C₂N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries