Hierarchical carbon/MoS2 composites as anodes for advanced electrochemical performance

Ma, Wenming; Zhang, Xiaojuan; Meng, Yonggang; Zhao, Jun

doi:10.1007/s11581-022-04772-4

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…Considering that MoS 2 has poor electrical conductivity and is prone to agglomeration during charging and discharging, resulting in poor cycling stability, the widely adopted solution is to combine MoS 2 with materials of strong electrical conductivity and stabilization, which has a synergistic effect and then improves the electrochemical properties, such as cycling stability. In the research work of Ma et al [ 12 ], hierarchical carbon/MoS 2 composites were successfully prepared via the facile hydrothermal method to enhance the electrochemical performance of MoS 2 anodes for lithium-ion batteries. The porous structure could provide a rapid transport path for lithium-ion diffusion, which effectively improved the cycling stability of the anode material.…”

Section: Introductionmentioning

confidence: 99%

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

Liu

et al. 2023

Molecules

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Traditional graphite anode material typically shows a low theoretical capacity and easy lithium decomposition. Molybdenum disulfide is one of the promising anode materials for advanced lithium-ion batteries, which possess low cost, unique two-dimensional layered structure, and high theoretical capacity. However, the low reversible capacity and the cycling-capacity retention rate induced by its poor conductivity and volume expansion during cycling blocks further application. In this paper, a collaborative control strategy of monodisperse MoS2/graphite composites was utilized and studied in detail. MoS2/graphite nanocomposites with different ratios (MoS2:graphite = 20%:80%, 40%:60%, 60%:40%, and 80%:20%) were prepared by mechanical ball-milling and low-temperature annealing. The graphite sheets were uniformly dispersed between the MoS2 sheets by the ball-milling process, which effectively reduced the agglomeration of MoS2 and simultaneously improved the electrical conductivity of the composite. It was found that the capacity of MoS2/graphite composites kept increasing along with the increasing percentage of MoS2 and possessed the highest initial discharge capacity (832.70 mAh/g) when MoS2:graphite = 80%:20%. This facile strategy is easy to implement, is low-cost, and is cosmically produced, which is suitable for the development and manufacture of advance lithium-ion batteries.

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Section: Introductionmentioning

confidence: 99%

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

Liu

et al. 2023

Molecules

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“…This excellent cycling performance is attributed to the superior electronic conductivity of N-doped MoS 2 anode materials, which provides a pathway for charge transport. Moreover, previous studies − indicated that the incorporation of carbon-based materials with molybdenum disulfide can greatly improve the conductivity of materials due to the high conductivity and specific surface area of the former. Carbon-based materials, such as graphene, carbon nanotubes (CNTs), and porous carbon, are commonly combined with molybdenum disulfide.…”

Section: Introductionmentioning

confidence: 99%

PEG–PVP-Assisted Hydrothermal Synthesis and Electrochemical Performance of N-Doped MoS₂/C Composites as Anode Material for Lithium-Ion Batteries

Liu,

Yang,

Fan

et al. 2024

ACS Omega

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Molybdenum disulfide shows promise as an anode material for lithium-ion batteries. However, its commercial potential has been constrained due to the poor conductivity and significant volume expansion during the charge/discharge cycles. To address these issues, in this study, N-doped MoS 2 /C composites (NMC) were prepared via an enhanced hydrothermal method, using ammonium molybdate and thiourea as molybdenum and sulfur sources, respectively. Polyethylene glycol 400 (PEG400) and polyvinylpyrrolidone (PVP) were added in the hydrothermal procedure as soft template surfactants and nitrogen/carbon sources. The crystal structure, morphology, elemental composition, and surface valence state of the N-doped MoS 2 /C composites were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS), respectively. The results indicate that the NMC prepared by this method are spherical particles with a nanoflower-like structure composed of MoS 2 flakes, having an average particle size of about 500 nm. XPS analysis shows the existence of C and N elements in the samples as C−N, C−C, and pyrrolic N. As anodes for LIBs, the NMC without annealing deliver an initial discharge capacity of 548.2 mAh•g −1 at a current density of 500 mA•g −1 . However, this capacity decays in the following cycles with a discharge capacity of 66.4 mAh•g −1 and a capacity retention rate of only 12% after 50 cycles. In contrast, the electrochemical properties of the counterparts are enhanced after annealing, which exhibits an initial discharge capacity of 575.9 mAh•g −1 and an ultimate discharge capacity of 669.2 mAh•g −1 after 70 cycles. The capacity retention rate decreases initially but later increases and elevated afterward to reach 116% at the 70th cycle, indicating an improvement in charge−discharge performance. The specimens after annealing have a smaller impedance, which indicates better charge transport and lithium-ion diffusion performance.

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Hierarchical carbon/MoS2 composites as anodes for advanced electrochemical performance

Cited by 2 publications

References 29 publications

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

PEG–PVP-Assisted Hydrothermal Synthesis and Electrochemical Performance of N-Doped MoS₂/C Composites as Anode Material for Lithium-Ion Batteries

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Hierarchical carbon/MoS2 composites as anodes for advanced electrochemical performance

Cited by 2 publications

References 29 publications

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

PEG–PVP-Assisted Hydrothermal Synthesis and Electrochemical Performance of N-Doped MoS2/C Composites as Anode Material for Lithium-Ion Batteries

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PEG–PVP-Assisted Hydrothermal Synthesis and Electrochemical Performance of N-Doped MoS₂/C Composites as Anode Material for Lithium-Ion Batteries