Study of the Rolling Effect on MoS2–Carbon Fiber Density and Its Consequences for the Functionality of Li-Ion Batteries

In this study, an electrode slurry composed of molybdenum disulfide (MoS2) and vapor-grown carbon fiber (VGCF) prepared through a solid-phase synthesis method was blade-coated onto copper foil to form a thick film as the anode for lithium-ion batteries. In previously reported work, MoS2-based lithiu...

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Published in:Materials 2024-06, Vol.17 (12), p.2825
Main Authors: Wu, Tai-Yu, Li, Xiao-Ru, Chen, Bo-Chun, Wang, Li-Wen, Wang, Jia-Hao, Chu, Sheng-Yuan, Chang, Chia-Chin
Format: Article
Language:English
Subjects:
Carbon black
Carbon fibers
Charge materials
Chemical vapor deposition
Composite materials
Copper
Density
Discharge
Electrochemical analysis
Electrode materials
Electrodes
Electrolytes
Lithium
Lithium-ion batteries
Metal foils
Molybdenum disulfide
Morphology
Rechargeable batteries
Solid phase synthesis
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Summary:In this study, an electrode slurry composed of molybdenum disulfide (MoS2) and vapor-grown carbon fiber (VGCF) prepared through a solid-phase synthesis method was blade-coated onto copper foil to form a thick film as the anode for lithium-ion batteries. In previously reported work, MoS2-based lithium-ion batteries have experienced gradual deformation, fracture, and pulverization of electrode materials during the charge and discharge cycling process. This leads to an unstable electrode structure and rapid decline in battery capacity. Furthermore, MoS2 nanosheets tend to aggregate over charge and discharge cycles, which diminishes the surface activity of the material and results in poor electrochemical performance. In this study, we altered the density of the MoS2–carbon fiber/Cu foil anode electrode by rolling. Three different densities of electrode sheets were obtained through varying rolling repetitions. Our study shows the best electrochemical performance was achieved at a material density of 2.2 g/cm3, maintaining a capacity of 427 mAh/g even after 80 cycles.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma17122825