Diffusion mechanism and electrochemical investigation of 1T phase Al–MoS2@rGO nano-composite as a high-performance anode for sodium-ion batteries

Singh, Manish K.; Pati, Jayashree; Seth, Deepak; Prasad, Jagdees; Agarwal, Manish; Haider, M. Ali; Chang, Jeng‐Kuei; Dhaka, R. S.

doi:10.1016/j.cej.2022.140140

Cited by 18 publications

(7 citation statements)

References 92 publications

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“…During the subsequent charging process, the R tot of all three samples continuously decreased, possibly due to the volume contraction as well as the disappearance of the non-conductive Na 2 S matrix. [45,46] As a result, the R tot values for P-FeS@C-CNT, D-FeS-C-CNT, and D-FeS-C at the end of the initial charge were 172, 209, and 193 Ω, respectively. The sodium ion diffusion coefficient (D Na+ ) variations of the three samples, calculated using the following equation in the Nyquist plot, also showed good correlations with the R tot variations in Figure 7d-f.…”

Section: Resultsmentioning

confidence: 97%

Synthesis of Iron Sulfide Nanocrystals Encapsulated in Highly Porous Carbon‐Coated CNT Microsphere as Anode Materials for Sodium‐Ion Batteries

Kim,

Seo,

Kim

et al. 2023

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Highly porous carbon materials with a rationally designed pore structure can be utilized as reservoirs for metal or nonmetal components. The use of small‐sized metal or metal compound nanoparticles, completely encapsulated by carbon materials, has attracted significant attention as an effective approach to enhancing sodium ion storage properties. These materials have the ability to mitigate structural collapse caused by volume expansion during the charging process, enable short ion transport length, and prevent polysulfide elution. In this study, a concept of highly porous carbon‐coated carbon nanotube (CNT) porous microspheres, which serve as excellent reservoir materials is suggested and a porous microsphere is developed by encapsulating iron sulfide nanocrystals within the highly porous carbon‐coated CNTs using a sulfidation process. Furthermore, various sulfidation processes to determine the optimal method for achieving complete encapsulation are investigated by comparing the morphologies of diverse iron sulfide‐carbon composites. The fully encapsulated structure, combined with the porous carbon, provides ample space to accommodate the significant volume changes during cycling. As a result, the porous iron sulfide‐carbon‐CNT composite microspheres exhibited outstanding cycling stability (293 mA h g−1 over 600 cycles at 1 A g−1) and remarkable rate capability (100 mA h g−1 at 5 A g−1).

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Section: Resultsmentioning

confidence: 97%

Synthesis of Iron Sulfide Nanocrystals Encapsulated in Highly Porous Carbon‐Coated CNT Microsphere as Anode Materials for Sodium‐Ion Batteries

Kim,

Seo,

Kim

et al. 2023

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“…With migration mechanisms at the 2D heterojunction being unveiled from first principles, experimental works can set up specific synthesis pathways (e.g., phase-selected and defects-engineering syntheses) and preparation procedures (e.g., interlayer expanded interfaces) toward more functional products. [83][84][85] Titanium oxides are also capable of reversibly intercalating Na at low redox potentials. Starting from the structural lithium analogue, the rock salt-type Na 2 Ti 3 O 7 has been proposed as NIB anode.…”

Section: Sodiation Process In Intercalation Anodes: the Key Role Of M...mentioning

confidence: 99%

First-principles design of nanostructured electrode materials for Na-ion batteries: challenges and perspectives

Massaro¹,

Fasulo²,

Pecoraro³

et al. 2023

Phys. Chem. Chem. Phys.

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“…[19] Currently, various approaches have been developed to synthesize 1T-MoS 2 to improve the sodium storage performance of MoS 2 , such as alkali metal ion intercalation, [20][21][22] atomic interface engineering [4,23] and heteroatom doping. [22,24] Xia et al [4] assembled 2H-MoS 2 on monoatomically decentralized Fe─N─C (SA Fe─N─C) supports via atomic-interface engineering. The electron transferred from SA Fe─N─C to 2H-MoS 2 through Fe─S bonds, which directly tuned the 2H to 1T phase variation process of MoS 2 during sodiation/desodiation process, resulting in fast Na + storage kinetics and excellent electrical conductivity of 1T/2H MoS 2 /SA Fe─N─C.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the phase transition during the nucleation and growth of MoS 2 can be promoted by heteroatom doping. Singh et al [24] proposed an Al doped MoS 2 @rGO composites strategy to synthesize 1T phase MoS 2 . The interlayer spacings of MoS 2 nanosheets were enlarged by Al doping and a stable 1T phase was formed.…”

Section: Introductionmentioning

confidence: 99%

Electron Modulated and Phosphate Radical Stabilized 1T‐Rich MoS₂ for Ultra‐Fast‐Charged Sodium Ion Storage

Zhang,

Wang,

Shan

et al. 2023

Advanced Energy Materials

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Metallic phase molybdenum sulfide (1T‐MoS2) is considered as an attractive electrode material for sodium‐ion batteries (SIBs) owing to its abundant active sites, metallic conductivity and high theoretical capacity. Unfortunately, the thermodynamic unstable characteristic under natural conditions makes 1T‐MoS2 difficult to synthesize directly, which greatly hinders its further applications. Herein, an electron modulated and phosphate radical stabilized strategy is employed to construct stable 1T‐rich MoS2 (1T‐P‐MoS2). The PO43− groups are intercalated into MoS2 via a simple one‐step synthesis process, which enlarges the interlayer spacings and improves the insertion/extraction kinetics of Na+. Density functional theory (DFT) calculations and experiments demonstrate that the PO43− can give partial electrons to Mo upon PO43− intercalation, which triggers the reorganization of Mo 4d orbitals, resulting in a spontaneous phase transition of MoS2 from 2H to 1T phase, thereby enhancing the electrical conductivity of MoS2. The obtained 1T‐P‐MoS2 exhibits ultra‐fast charged properties (up to 277.1 mAh g−1 at 40 A g−1, discharged/charged within 25 s) and excellent cycling performance (up to 498.9 mAh g−1 after 300 cycles at 1 A g−1). This work provides a feasible technical solution and analyses the deep mechanisms on tuning of metal sulfide electrodes for advanced SIBs.

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Diffusion mechanism and electrochemical investigation of 1T phase Al–MoS2@rGO nano-composite as a high-performance anode for sodium-ion batteries

Cited by 18 publications

References 92 publications

Synthesis of Iron Sulfide Nanocrystals Encapsulated in Highly Porous Carbon‐Coated CNT Microsphere as Anode Materials for Sodium‐Ion Batteries

Synthesis of Iron Sulfide Nanocrystals Encapsulated in Highly Porous Carbon‐Coated CNT Microsphere as Anode Materials for Sodium‐Ion Batteries

First-principles design of nanostructured electrode materials for Na-ion batteries: challenges and perspectives

Electron Modulated and Phosphate Radical Stabilized 1T‐Rich MoS₂ for Ultra‐Fast‐Charged Sodium Ion Storage

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Diffusion mechanism and electrochemical investigation of 1T phase Al–MoS2@rGO nano-composite as a high-performance anode for sodium-ion batteries

Cited by 18 publications

References 92 publications

Synthesis of Iron Sulfide Nanocrystals Encapsulated in Highly Porous Carbon‐Coated CNT Microsphere as Anode Materials for Sodium‐Ion Batteries

Synthesis of Iron Sulfide Nanocrystals Encapsulated in Highly Porous Carbon‐Coated CNT Microsphere as Anode Materials for Sodium‐Ion Batteries

First-principles design of nanostructured electrode materials for Na-ion batteries: challenges and perspectives

Electron Modulated and Phosphate Radical Stabilized 1T‐Rich MoS2 for Ultra‐Fast‐Charged Sodium Ion Storage

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Product

Resources

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Electron Modulated and Phosphate Radical Stabilized 1T‐Rich MoS₂ for Ultra‐Fast‐Charged Sodium Ion Storage