Enhanced electrochemical performance of MoS<sub>2</sub>/graphene nanosheet nanocomposites

Choi, Jinsung; Kim, Min‐Cheol; Moon, Sangook; Kim, Hyeona; Kim, Yo-Seob; Park, Kyung-Won

doi:10.1039/d0ra03539d

Cited by 20 publications

(10 citation statements)

References 43 publications

(43 reference statements)

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“…The reversible capacity of 15-MoS 2 /GNS (628 mAh g –1 ), after 150 cycles, is lower than 10-MoS 2 /GNS, which may be attributed to the increased solid electrolyte interphase (SEI) film formation on the ultrathin nanosheets after additional pan-milling cycles. To make a further comparison, we summarized the electrochemical properties of some MoS 2 /GNS electrodes, as shown in Table . − , It can be seen that the reversible specific capacity of obtained 10-MoS 2 /GNS are comparable to those of other kinds of MoS 2 /GNS electrodes from the literature, indicating that it is feasible to prepare composite electrode materials with a high electrochemical performance by this pan-milling technology.…”

Section: Resultsmentioning

confidence: 99%

“…Strategies, such as reducing the size of bulk MoS 2 to a few layers, fabricating 3D nanostructures, and combining with carbon materials, − have been demonstrated to address the above problems associated with MoS 2 . In particular, combining MoS 2 with carbon materials is the most studied method because the carbon materials not only prevent the restacking of MoS 2 but also increase the electronic conductivity of the composites.…”

Section: Introductionmentioning

confidence: 99%

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One-Step Preparation of MoS₂/Graphene Nanosheets via Solid-State Pan-Milling for High Rate Lithium-Ion Batteries

Liu

Wang

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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A novel, high-yield, one-step approach was developed to prepare MoS2/graphene nanosheets (GNS) by exfoliating commercial bulk MoS2 and graphite via solid-state pan-milling. We found that pan-milling could be used to co-exfoliate MoS2 and graphite into few-layer MoS2/GNS heterostructures, which could improve the electronic conductivity between the MoS2 layers and could decrease the Li+ diffusion barrier at the MoS2/graphene interfaces. As an anode material in lithium-ion batteries (LIBs), the MoS2/GNS milled for 10 cycles, exhibited a high reversible capacity of about 654 mAh g–1 after 150 cycles at 200 mA g–1, and had excellent rate capability (418 mAh g–1 at 2 A g–1) compared to commercial MoS2/graphite. The method described in this work provides a simple and ecofriendly strategy for the preparation of two-dimensional materials and composites by exfoliating commercial crystalline materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One-Step Preparation of MoS₂/Graphene Nanosheets via Solid-State Pan-Milling for High Rate Lithium-Ion Batteries

Liu

Wang

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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“…Its excellent theoretical capacity of roughly 670 milliampere-hours per gram is largely attributable to its multi-layered structure, allowing for rapid ion exchange when lithium is inserted or removed. 76 Electrode conductivity was improved by synthesizing a hybrid material containing MoS 2 and graphene. Composites, therefore, show a considerable increase in capacity and enhance durability with repeated cycling.…”

Section: Anode Materials For Li-ion Batteries Using Graphene-based Co...mentioning

confidence: 99%

Review—Recent Advancements in Graphene-Based Electrodes for Lithium-Ion Batteries

Alathlawi,

Hassan

2024

ECS J. Solid State Sci. Technol.

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Lithium-ion batteries (LIBs) are highly promising energy storage devices because they provide high power output and an extended cycling lifespan, resulting in a unified and efficient system. However, current lithium-ion batteries have limitations in providing high energy density due to the slow spread of Li+ ions and the low electrical conductivity of the anode and cathode materials. This trade-off results in a situation where the power is concentrated rather than the energy. Furthermore, the significant disparities in capacity and kinetics between the anode and cathode lead to subpar rate performance and inadequate cycling stability. Hence, the development of anode materials with high power capability and structural stability holds immense importance in the context of practical LIBs. Graphene-based materials have been extensively analyzed as cathode materials in LIBs due to their distinctive structure and exceptional electrochemical characteristics. Noteworthy progress has been achieved in this field. This review summarizes recent advances in graphene-based anodes and cathodes for lithium-ion batteries and concludes by analyzing current obstacles and providing recommendations for future research.

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“…As an alternative to the graphite anode, the molybdenum disulfide with a layered graphite-like structure has been extensively investigated because of its high theoretical specific capacity (∼670 mAh·g –1 ), , low price, and abundant reservation. Nevertheless, there are some obstacles to its commercial applications, − such as structural collapse resulting from volume expansion during charge/discharge processes and relatively poor conductivity as a type of semiconductor material.…”

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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Enhanced electrochemical performance of MoS₂/graphene nanosheet nanocomposites

Abstract: MoS2/GNS 8 : 2 with an appropriate portion of GNS exhibited the best LIB performance, due to the lowest interfacial resistance and highest Li-ion diffusivity.

Cited by 20 publications

References 43 publications

One-Step Preparation of MoS₂/Graphene Nanosheets via Solid-State Pan-Milling for High Rate Lithium-Ion Batteries

One-Step Preparation of MoS₂/Graphene Nanosheets via Solid-State Pan-Milling for High Rate Lithium-Ion Batteries

Review—Recent Advancements in Graphene-Based Electrodes for 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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Enhanced electrochemical performance of MoS2/graphene nanosheet nanocomposites

Abstract: MoS2/GNS 8 : 2 with an appropriate portion of GNS exhibited the best LIB performance, due to the lowest interfacial resistance and highest Li-ion diffusivity.

Cited by 20 publications

References 43 publications

One-Step Preparation of MoS2/Graphene Nanosheets via Solid-State Pan-Milling for High Rate Lithium-Ion Batteries

One-Step Preparation of MoS2/Graphene Nanosheets via Solid-State Pan-Milling for High Rate Lithium-Ion Batteries

Review—Recent Advancements in Graphene-Based Electrodes for 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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Enhanced electrochemical performance of MoS₂/graphene nanosheet nanocomposites

One-Step Preparation of MoS₂/Graphene Nanosheets via Solid-State Pan-Milling for High Rate Lithium-Ion Batteries

One-Step Preparation of MoS₂/Graphene Nanosheets via Solid-State Pan-Milling for High Rate Lithium-Ion Batteries

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