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 26 publications

(8 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

Small

View full text Add to dashboard Cite

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).

show abstract

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

Small

View full text Add to dashboard Cite

show abstract

“…where M B and m B are the relative molecular weight and weigh, ∆E S is the change of regulated voltage, and ∆E t is the voltage variation of the discharge pulse, A and V m are the electrode area and the molar volume, and L is the thickness of the electrode material on the collector (figure 6(d)) [13,36,46]. As depicted in figure 6(e), the diffusion coefficient of Na + in the FeSe 2 @NCF electrode was calculated in the range of 2.96 × 10 -11 to 5.38 × 10 −8 cm 2 s −1 , superior to those of reported FeSe 2 -based materials, which can account for the high-rate performance of the FeSe 2 @NCF electrode [24,28,30,34,38,47].…”

Section: Resultsmentioning

confidence: 99%

“…Among the next-generation batteries, sodium-ion batteries (SIBs) are considered as promising candidates due to the abundant natural reserves and inexpensive sodium-containing resources [6][7][8][9][10][11][12]. Even with similar electrochemical mechanisms to LIBs, the larger ionic radius and heavier atomic weight of sodium will lead to sluggish ion diffusion kinetics and drastic volume changes of SIB electrodes as compared with those of lithium [13,14]. Moreover, the ultrafast charging capability of batteries is a key factor for the successful promotion of electric vehicles and portable electronics [1,15].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast and ultrastable FeSe₂ embedded in nitrogen-doped carbon nanofibers anode for sodium-ion half/full batteries

Chen,

Hu,

Xue

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

Transition metal selenides are considered as promising anode materials for fast-charging sodium-ion batteries due to their high theoretical specific capacity. However, the low intrinsic conductivity, particle aggregation, and large volume expansion problems can severely inhibit the high-rate and long-cycle performance of the electrode. Herein, FeSe2 nanoparticles embedded in nitrogen-doped carbon nanofibers (FeSe2@NCF) have been synthesized using the electrospinning and selenization process, which can alleviate the volume expansion and particle aggregation during the sodiation/desodiation and improve the electrical conductivity of the electrode. The FeSe2@NCF electrode delivers the outstanding specific capacity of 222.3 mAh g-1 at a fast current density of 50 A g-1 and 262.1 mAh g-1 at 10 A g-1 with the 87.8 % capacity retention after 5000 cycles. Furthermore, the Na-ion full cells assembled with pre-sodiated FeSe2@NCF as anode and Na3V2(PO4)3/C as cathode exhibit the reversible specific capacity of 117.6 mAh g-1 at 5 A g-1 with the 84.3 % capacity retention after 1000 cycles. This work provides a promising way for the conversion-based metal selenides for the applications as fast-charging sodium-ion battery anode.

show abstract

“…[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

View full text Add to dashboard Cite

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.

show abstract

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

Cited by 26 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

Ultrafast and ultrastable FeSe₂ embedded in nitrogen-doped carbon nanofibers anode for sodium-ion half/full batteries

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

Contact Info

Product

Resources

About

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

Cited by 26 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

Ultrafast and ultrastable FeSe2 embedded in nitrogen-doped carbon nanofibers anode for sodium-ion half/full batteries

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

Contact Info

Product

Resources

About

Ultrafast and ultrastable FeSe₂ embedded in nitrogen-doped carbon nanofibers anode for sodium-ion half/full batteries

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