Deciphering the catalysis essence of vanadium self-intercalated two-dimensional vanadium sulfides (V5S8) on lithium polysulfide towards high-rate and ultra-stable Li-S batteries

Zhang, Chao Yue; Sun, Guo Wen; Shi, Zu De; Liu, Qian Yu; Pan, Jiang Long; Wang, Yan Chun; Zhao, Hao; Sun, Geng Zhi; Gao, Xiu Ping; Pan, Xiao Jun; Zhou, Jin

doi:10.1016/j.ensm.2021.09.030

Cited by 45 publications

(29 citation statements)

References 60 publications

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“…The N signal of CNFs exhibits pyridinic nitrogen (398.7 eV), pyrrolic nitrogen (399.8 eV), and graphitic nitrogen (400.5 eV), which are derived from the decomposition of PAN . The presence of pyridinic nitrogen and pyrrolic nitrogen can not only improve the conductivity of the CNF substrate but also provide more active sites for storing lithium ions. , Co 2p of CoS 2 /CNFs shows two Co 2p 1/2 peaks (779.1 and 781.3 eV), two Co 2p 1/2 peaks (794.1 and 797.0 eV), and two satellite peaks (786.1 and 803.1 eV). In the S 2p spectrum of CoS 2 /CNFs, there are three peaks located at 163.2, 164.3, and 169.2 eV, corresponding to S 2p 1/2 , S 2p 3/2 , and S–O. , The weak peak of S–O reveals no obvious oxidation on the surface.…”

Section: Resultsmentioning

confidence: 99%

“…38 The presence of pyridinic nitrogen and pyrrolic nitrogen can not only improve the conductivity of the CNF substrate but also provide more active sites for storing lithium ions. 39,40 41,42 The weak peak of S−O reveals no obvious oxidation on the surface. Using CoS 2 /CNFs as a typical example, the XPS spectra and EDS images (Figure 1d shows two peaks: Co 2p 3/2 (780.1 eV) and Co 2p 1/2 (795.9 eV), accompanied by two satellite peaks, which are 786.1 and 802.9 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Anion Design-Enabled High-Performance Cobalt-Based 3D Conductive Interlayers to Suppress the Shuttle Effect for Lithium–Sulfur Batteries

Shi

Lü

et al. 2022

ACS Appl. Energy Mater.

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Recently, transition-metal compounds (TMCs) with unique adsorptive and catalytic properties have shown great promise in lithium–sulfur (Li–S) batteries to inhibit the shuttle effect. However, current studies mostly focus on the morphology control of one specific TMC, while the relationship between the composition and performance is insufficiently revealed. Nevertheless, the polarity and catalytic activity are largely dependent on the components of TMCs, especially the anion species. Herein, we take Co–X (X = O, P, and S) compounds as example compounds and systematically investigate the compositional effects of Co–X compounds on their inhibition abilities for the shuttle effect. To conduct the investigation, CoS2, CoP, and Co3O4 flowers with identical morphologies and nanostructures were successfully grown on 3D conductive self-supporting carbon nanofibers (CNFs) via a facile electrospun method combined with post-heat treatment. When tested in Li–S batteries, the CoS2/CNF interlayer outperforms its phosphide and oxide counterparts, displaying the strongest adsorption ability and the highest catalytic activity toward polysulfides. Impressively, Li–S batteries coupled with CoS2/CNF interlayers exhibit outstanding electrochemical performance with a high specific capacity of 1115.2 mA h g–1 and enhanced cycling stability of 884.4 mA h g–1 after 200 cycles. We believe such an anion design strategy could open a new avenue for constructing high-performance Li–S batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Anion Design-Enabled High-Performance Cobalt-Based 3D Conductive Interlayers to Suppress the Shuttle Effect for Lithium–Sulfur Batteries

Shi

Lü

et al. 2022

ACS Appl. Energy Mater.

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“…Metal sulfides with strong polar interactions with NaPSs and catalytic effects on polysulfides conversion have been widely applied in LiS batteries. [ 69–77 ] It is recently demonstrated that metal sulfides likewise exhibit electrocatalytic function toward tuning sulfur speciation pathways. In terms of sulfur species conversion chemistry, each Mo atom of MoS 2 could be coupled with 6 S atoms to form strong MoS bonds, which can boost the redox kinetics of S species.…”

Section: Catalytic Reversible Conversion Of Polysulfidesmentioning

confidence: 99%

Electrocatalysis in Room Temperature Sodium‐Sulfur Batteries: Tunable Pathway of Sulfur Speciation

Wang

Zhang

et al. 2022

Small Methods

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Benefiting from the merits of natural abundance, low cost, and ultrahigh theoretical energy density, the room temperature sodium‐sulfur (RT NaS) batteries are regarded as one of the promising candidates for the next‐generation scalable energy storage devices. However, the uncontrollable sulfur speciation pathways severely hinder its practical applications. Recently, various strategies have been employed to tune the conversion pathways of sulfur, such as physical confinement, chemical inhibition, and electrocatalysis. Herein, the recent advances in electrocatalytic effects manipulate sulfur speciation pathways in advanced RT NaS electrochemistry are reviewed, including the promotion of the nearly full conversion of long‐chain polysulfides, short‐chain polysulfides, and small sulfur molecules. The underlying catalytic modulation mechanism that fundamentally tunes the electrochemical pathway of sulfur species is comprehensively summarized along with the design strategies for catalytic active centers. Furthermore, the challenge and potential solutions to realize the quasi‐solid conversion of sulfur are proposed to accelerate the real application of RT NaS batteries.

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“…Another strategy is to dope metal heteroatoms in the MoS 2 matrix . In this design, the substitution of the Mo atom with metal heteroatoms will make MoS 2 be more asymmetric and higher conductivity, which will highly improve the catalysis effect on the conversion of Li 2 S n species, , but induces a slight enhancement to the anchoring ability of Li 2 S n species . At the same time, most of the high performances were obtained from the doped MoS 2 monolayers.…”

Section: Introductionmentioning

confidence: 99%

Metal Ion Cutting-Assisted Synthesis of Defect-Rich MoS₂ Nanosheets for High-Rate and Ultrastable Li₂S Catalytic Deposition

Liu

Sun

Pan

et al. 2022

ACS Appl. Mater. Interfaces

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Active metal ions often show a strong cutting effect on the chemical bonds during high-temperature thermal processes. Herein, a one-pot metal ion cutting-assisted method was adopted to design defect-rich MoS 2−x nanosheet (NS)/ZnS nanoparticle (NP) heterojunction composites on carbon nanofiber skeletons (CNF@MoS 2−x /ZnS) via a simple Ar-ambience annealing. Results show that Zn 2+ ions capture S 2− ions from MoS 2 and form into ZnS NPs, and the MoS 2 NSs lose S 2− ions and become MoS 2−x ones. As sulfur hosts for lithium−sulfur batteries (LSBs), the CNF@MoS 2−x /ZnS−S cathodes deliver a high reversible capacity of 1233 mA h g −1 at 0.1 C and keep 944 mA h g −1 at 3 C. Moreover, the cathodes also show an extremely low decay rate of 0.012% for 900 cycles at 2 C. Series of analysis indicate that the MoS 2−x NSs significantly improve the chemisorption and catalyze the kinetic process of redox reactions of lithium polysulfides, and the heterojunctions between MoS 2−x NSs and ZnS NPs further accelerate the transport of electrons and the diffusion of Li + ions. Besides, the CNF@MoS 2−x /ZnS−S LSBs also show an ultralow self-discharge rate of 1.1% in voltage. This research would give some new insights for the design of defect-rich electrode materials for high-performance energy storage devices.

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Deciphering the catalysis essence of vanadium self-intercalated two-dimensional vanadium sulfides (V5S8) on lithium polysulfide towards high-rate and ultra-stable Li-S batteries

Cited by 45 publications

References 60 publications

Anion Design-Enabled High-Performance Cobalt-Based 3D Conductive Interlayers to Suppress the Shuttle Effect for Lithium–Sulfur Batteries

Anion Design-Enabled High-Performance Cobalt-Based 3D Conductive Interlayers to Suppress the Shuttle Effect for Lithium–Sulfur Batteries

Electrocatalysis in Room Temperature Sodium‐Sulfur Batteries: Tunable Pathway of Sulfur Speciation

Metal Ion Cutting-Assisted Synthesis of Defect-Rich MoS₂ Nanosheets for High-Rate and Ultrastable Li₂S Catalytic Deposition

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Deciphering the catalysis essence of vanadium self-intercalated two-dimensional vanadium sulfides (V5S8) on lithium polysulfide towards high-rate and ultra-stable Li-S batteries

Cited by 45 publications

References 60 publications

Anion Design-Enabled High-Performance Cobalt-Based 3D Conductive Interlayers to Suppress the Shuttle Effect for Lithium–Sulfur Batteries

Anion Design-Enabled High-Performance Cobalt-Based 3D Conductive Interlayers to Suppress the Shuttle Effect for Lithium–Sulfur Batteries

Electrocatalysis in Room Temperature Sodium‐Sulfur Batteries: Tunable Pathway of Sulfur Speciation

Metal Ion Cutting-Assisted Synthesis of Defect-Rich MoS2 Nanosheets for High-Rate and Ultrastable Li2S Catalytic Deposition

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Metal Ion Cutting-Assisted Synthesis of Defect-Rich MoS₂ Nanosheets for High-Rate and Ultrastable Li₂S Catalytic Deposition