Vanadium Intercalation into Niobium Disulfide to Enhance the Catalytic Activity for Lithium–Sulfur Batteries

Cheng, Huiting; Shen, Zihan; Wan, Li‐Jun; Luo, Minghui; Huo, Fengwei; Hui, Junfeng; Zhu, Qingshan; Zhang, Huigang

doi:10.1021/acsnano.3c02634

Cited by 18 publications

(5 citation statements)

References 60 publications

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“…In addition, the delivered capacity decreases more significantly with cycles than the low-loading cell, and the CEs also decrease. The comparison between Figure c,d indicates that increasing the areal S load in a single cathode is detrimental to the cycling properties probably because too much charge transferred forces extravagant Li stripping and plating in the anodes and leads to the degradation of the anodes. − Even worse, polysulfide shuttling aggravates the situation and decreases the CEs.…”

Section: Resultsmentioning

confidence: 99%

V-Doped CoSe₂ Nanowire Catalysts in a 3D-Structured Electrode for Durable Li–S Pouch Cells

Li,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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Lithium−sulfur (Li−S) batteries have high theoretical energy density and are regarded as a promising candidate for next-generation energy storage systems. However, their practical applications are hindered by the slow kinetics of sulfur conversion and polysulfide shuttling. In particular, large-scale pouch cells show much poor cyclability. Here, we develop a high-efficiency catalyst of V-doped CoSe 2 by studying the binary CoSe 2 −VSe 2 system and confirming its effectiveness in accelerating polysulfide conversion. The coin cell tests reveal an initial capacity of 1414 mAh g −1 at 0.1 C and 1049 mAh g −1 at 1 C and demonstrate 1000 times cyclability with a decaying rate of 0.05% per cycle. Furthermore, the assembly and construction of pouch cells were optimized with monolithic three-dimensional (3D) electrodes and a multistacking strategy. Specifically, a 3D metallic scaffold (3MS) was developed to host V-doped CoSe 2 nanowires and sulfur. In addition, Janus microspheres of C@TiO 2 were synthesized to capture polar polysulfides with their polar part of TiO 2 and adsorb nonpolar sulfur with their nonpolar part of carbon. By integrating with 3MS, C@TiO 2 microspheres can block all ion channels of 3MS and only allow Li ions in and out. These integral designs and monolithic structures enable multistacking pouch cells with high cyclability. A high-loading pouch cell was demonstrated with a total capacity of 700 mAh. The cell can be cycled for 70 times with a capacity retention of 65.7%. In brief, this work provides an integral strategy of catalyst design and overall 3D assembly for practical Li−S batteries in a large pouch cell format.

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Section: Resultsmentioning

confidence: 99%

V-Doped CoSe₂ Nanowire Catalysts in a 3D-Structured Electrode for Durable Li–S Pouch Cells

Li,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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“…Co-N/G indicated a lower ∆G than N/G for the Li 2 S 2 reduction, implying a more favorable reaction pathway. Based on the ∆G calculations, various catalyst materials have been predicted, such as single atoms [77], metal oxides [78][79][80], sulfides [81], nitrides [82,83], and heterostructures [84,85], which present accelerated conversion kinetics for Li-S batteries.…”

Section: Gibbs Free Energymentioning

confidence: 99%

Theoretical Calculations Facilitating Catalysis for Advanced Lithium-Sulfur Batteries

Fang,

Zhou,

Chen

et al. 2023

Molecules

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Lithium-sulfur (Li-S) batteries have emerged as one of the most hopeful alternatives for energy storage systems. However, the commercialization of Li-S batteries is still confronted with enormous hurdles. The poor conductivity of sulfur cathodes induces sluggish redox kinetics. The shuttling of polysulfides incurs the heavy failure of electroactive substances. Tremendous efforts in experiments to seek efficient catalysts have achieved significant success. Unfortunately, the understanding of the underlying catalytic mechanisms is not very detailed due to the complicated multistep conversion reactions in Li-S batteries. In this review, we aim to give valuable insights into the connection between the catalyst activities and the structures based on theoretical calculations, which will lead the catalyst design towards high-performance Li-S batteries. This review first introduces the current advances and issues of Li-S batteries. Then we discuss the electronic structure calculations of catalysts. Besides, the relevant calculations of binding energies and Gibbs free energies are presented. Moreover, we discuss lithium-ion diffusion energy barriers and Li2S decomposition energy barriers. Finally, a Conclusions and Outlook section is provided in this review. It is found that calculations facilitate the understanding of the catalytic conversion mechanisms of sulfur species, accelerating the development of advanced catalysts for Li-S batteries.

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“…[7][8][9][10] The high theoretical capacity (1675 mAh g À1 ) and high theoretical energy density (2600 Wh kg À1 ) of LSBs have also sparked a great deal of interest in the field of energy devices. [11][12][13][14] Unfortunately, the development of LSBs has significant difficulties due to some drawbacks, especially for the cathode, such as the extremely low electrical conductivity of sulfur (10 À7 to 10 À30 S cm À1 at room temperature) and the insulating nature of discharge product Li 2 S 2 and Li 2 S. [15][16][17][18] The "shuttle effect" and impeded LiPS conversion reactions are treated as the imperative issues being responsible for low reversable capacity and poor cyclic performance. [19][20][21][22] Meanwhile, the lithium dendrite for the anode which occurs during the charging and discharging process also severely hinders the practical applications of LSBs.…”

Section: Introductionmentioning

confidence: 99%

Progresses and Prospects of Asymmetrically Coordinated Single Atom Catalysts for Lithium−Sulfur Batteries

Zhou,

Gu,

Guo

et al. 2024

Energy & Environ Materials

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Lithium–sulfur batteries (LSBs) are widely regarded as promising next‐generation batteries due to their high theoretical specific capacity and low material cost. However, the practical applications of LSBs are limited by the shuttle effect of lithium polysulfides (LiPSs), electronic insulation of charge and discharge products, and slow LiPSs conversion reaction kinetics. Accordingly, the introduction of catalysts into LSBs is one of the effective strategy to solve the issues of the sluggished LiPS conversion. Because of their nearly 100% atom utilization and high electrocatalytic activity, single‐atom catalysts (SACs) have been widely used as reaction mediators for LSBs' reactions. Excitingly, the SACs with asymmetric coordination structures have exhibited intriguing electronic structures and superior catalytic activities when compared to the traditional M–N4 active sites. In this review, we systematically describe the recent advancements in the installation of asymmetrically coordinated single‐atom structure as reactions catalysts in LSBs, including asymmetrically nitrogen coordinated SACs, heteroatom coordinated SACs, support effective asymmetrically coordinated SACs, and bimetallic coordinated SACs. Particularly noteworthy is the discussion of the catalytic conversion mechanism of LiPSs spanning asymmetrically coordinated SACs. Finally, a perspective on the future developments of asymmetrically coordinated SACs in LSB applications is provided.

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Vanadium Intercalation into Niobium Disulfide to Enhance the Catalytic Activity for Lithium–Sulfur Batteries

Cited by 18 publications

References 60 publications

V-Doped CoSe₂ Nanowire Catalysts in a 3D-Structured Electrode for Durable Li–S Pouch Cells

V-Doped CoSe₂ Nanowire Catalysts in a 3D-Structured Electrode for Durable Li–S Pouch Cells

Theoretical Calculations Facilitating Catalysis for Advanced Lithium-Sulfur Batteries

Progresses and Prospects of Asymmetrically Coordinated Single Atom Catalysts for Lithium−Sulfur Batteries

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Vanadium Intercalation into Niobium Disulfide to Enhance the Catalytic Activity for Lithium–Sulfur Batteries

Cited by 18 publications

References 60 publications

V-Doped CoSe2 Nanowire Catalysts in a 3D-Structured Electrode for Durable Li–S Pouch Cells

V-Doped CoSe2 Nanowire Catalysts in a 3D-Structured Electrode for Durable Li–S Pouch Cells

Theoretical Calculations Facilitating Catalysis for Advanced Lithium-Sulfur Batteries

Progresses and Prospects of Asymmetrically Coordinated Single Atom Catalysts for Lithium−Sulfur Batteries

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Product

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V-Doped CoSe₂ Nanowire Catalysts in a 3D-Structured Electrode for Durable Li–S Pouch Cells

V-Doped CoSe₂ Nanowire Catalysts in a 3D-Structured Electrode for Durable Li–S Pouch Cells