Enhancing electrochemical conversion of lithium polysulfide by 1T-rich MoSe2 nanosheets for high performance lithium–sulfur batteries

Li, Ruilong; Bai, Zhe; Hou, Wensuo; Wu, Zeyu; Feng, Pingli; Bai, Yu; Sun, Kening; Wang, Zhenhua

doi:10.1016/j.cclet.2023.108263

Chinese Chemical Letters

2023

DOI: 10.1016/j.cclet.2023.108263

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Enhancing electrochemical conversion of lithium polysulfide by 1T-rich MoSe2 nanosheets for high performance lithium–sulfur batteries

Ruilong Li

Zhe Bai

Wensuo Hou

et al.

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2024

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Cited by 11 publications

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“…Importantly, another new binding energy peak at 160.1 eV ascribed to S 2p of Mo–S bonding in addition to the characteristic binding energies of GSH (Figure k,l) are found in the high-resolution S 2p XPS spectrum of MoSe 2 -DPEG binding with GSH, suggesting the binding of GSH onto exposed active Mo centers. XPS analysis demonstrates that PDE of MoSe 2 by lithiation results in a large number of in-plane and edge defects in MoSe 2 -DPEG, which make it easy for GSH to coordinate with exposed active Mo centers through Mo–S bonds. , …”

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confidence: 99%

Phase and Defect Engineering of MoSe₂ Nanosheets for Enhanced NIR-II Photothermal Immunotherapy

Huang,

Song,

Huang

et al. 2024

Nano Lett.

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mentioning

confidence: 99%

Phase and Defect Engineering of MoSe₂ Nanosheets for Enhanced NIR-II Photothermal Immunotherapy

Huang,

Song,

Huang

et al. 2024

Nano Lett.

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Cation‐Vacancy Engineering Modulated Perovskite Oxide for Boosting Electrocatalytic Conversion of Polysulfides

Bai,

Wang,

Wang

et al. 2024

Adv Funct Materials

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Lithium‐sulfur batteries face challenges like polysulfide shuttle and slow conversion kinetics, hindering their practical applications in renewable energy storage and electric vehicles. Herein, a solution to solve this issue is reported by using a cation vacancy engineering strategy with rational synthesis of La‐deficient LaCoO3 (LCO‐VLa). The introduction of cation vacancies in LCO‐VLa modifies the geometric structure of coordinating atoms, exposing Co‐rich surface with more catalytically active surfaces. Meanwhile, the d‐band center of LCO‐VLa shifts toward the Fermi level, enhancing polysulfide adsorption. Furthermore, multivalent cobalt ions (Co3+/Co4+) induced by charge compensation enhance the electrical conductivity of LCO‐VLa, accelerating electron transfer processes and improving catalytic performance. Theoretical calculations and experimental characterizations demonstrate that La‐deficient LCO‐VLa effectively suppresses the polysulfide shuttle, reduces the energy barrier for polysulfide conversion, and accelerates redox reaction kinetics. LCO‐VLa‐based batteries demonstrate exceptional rate performance and cycling stability, retaining 70% capacity after nearly 500 cycles at 1.0 C, with a minimal decay rate of 0.055% per cycle. These findings highlight the significance of cation vacancy engineering for exploring precise structure‐activity relationships during polysulfides conversion, facilitating the rational design of catalysts at the atomic level for lithium‐sulfur batteries.

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Enabling Efficient Anchoring‐Conversion Interface by Fabricating Double‐Layer Functionalized Separator for Suppressing Shuttle Effect

Feng,

Zhang,

Liu

et al. 2024

Angewandte Chemie

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Lithium‐sulfur batteries (LiSBs) with high energy density still face challenges on sluggish conversion kinetics, severe shuttle effects of lithium polysulfides (LiPSs), and low blocking feature of ordinary separators to LiPSs. To tackle these, a novel double‐layer strategy to functionalize separators is proposed, which consists of Co with atomically dispersed CoN4 decorated on Ketjen black (Co/CoN4@KB) layer and an ultrathin 2D Ti3C2Tx MXene layer. The theoretical calculations and experimental results jointly demonstrate metallic Co sites provide efficient adsorption and catalytic capability for long‐chain LiPSs, while CoN4 active sites facilitate the absorption of short‐chain LiPSs and promote the conversion to Li2S. The stacking MXene layer serves as a microscopic barrier to further physically block and chemically anchor leaked LiPSs from the pores and gaps of the Co/CoN4@KB layer, thus preserving LiPSs within efficient anchoring‐conversion reaction interfaces to balance the accumulation of “dead S” and Li2S. Consequently, with an ultralight loading of Co/CoN4@KB‐MXene, the LiSBs exhibit amazing electrochemical performance even under high sulfur loading and lean electrolyte, and the outperforming performance for lithium‐selenium batteries (LiSeBs) can also be achieved. This work exploits a universal and effective strategy of a double‐layer functionalized separator to regulate the equilibrium adsorption‐catalytic interface, enabling high‐energy and long‐cycle LiSBs/LiSeBs.

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Enhancing electrochemical conversion of lithium polysulfide by 1T-rich MoSe2 nanosheets for high performance lithium–sulfur batteries

Cited by 11 publications

References 42 publications

Phase and Defect Engineering of MoSe₂ Nanosheets for Enhanced NIR-II Photothermal Immunotherapy

Phase and Defect Engineering of MoSe₂ Nanosheets for Enhanced NIR-II Photothermal Immunotherapy

Cation‐Vacancy Engineering Modulated Perovskite Oxide for Boosting Electrocatalytic Conversion of Polysulfides

Enabling Efficient Anchoring‐Conversion Interface by Fabricating Double‐Layer Functionalized Separator for Suppressing Shuttle Effect

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Enhancing electrochemical conversion of lithium polysulfide by 1T-rich MoSe2 nanosheets for high performance lithium–sulfur batteries

Cited by 11 publications

References 42 publications

Phase and Defect Engineering of MoSe2 Nanosheets for Enhanced NIR-II Photothermal Immunotherapy

Phase and Defect Engineering of MoSe2 Nanosheets for Enhanced NIR-II Photothermal Immunotherapy

Cation‐Vacancy Engineering Modulated Perovskite Oxide for Boosting Electrocatalytic Conversion of Polysulfides

Enabling Efficient Anchoring‐Conversion Interface by Fabricating Double‐Layer Functionalized Separator for Suppressing Shuttle Effect

Contact Info

Product

Resources

About

Phase and Defect Engineering of MoSe₂ Nanosheets for Enhanced NIR-II Photothermal Immunotherapy

Phase and Defect Engineering of MoSe₂ Nanosheets for Enhanced NIR-II Photothermal Immunotherapy