Toward layered MoS₂ anode for harvesting superior lithium storage

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Molybdenum disulphide (MoS₂) is a promising anode material for lithium-ion batteries (LIBs).
• Agglomeration limits the commercialization of MoS₂ anode materials.
• Producing few-layer MoS₂ nanosheets is crucial for enhanced battery performance.

Purpose of the Study:

• To develop a scalable method for preparing few-layer MoS₂ nanosheets.
• To investigate the relationship between the structural properties and electrochemical performance of MoS₂.
• To demonstrate the potential of MoS₂ nanosheets as advanced anode materials for LIBs.

Main Methods:

• Facile and scalable synthesis of large-flake, few-layer (4-8) MoS₂ nanosheets using ultrasonicated ball milling.
• Analysis using multiple spectroscopic techniques.
• Electrochemical performance testing as anode materials in LIBs.

Main Results:

• MoS₂ nanosheets exhibited a reversible capacity of 716 mA h g^-1 at 100 mA g^-1 after 285 cycles.
• Achieved an excellent capacity retention rate of up to 80%, significantly higher than commercial MoS₂ (14.8%).
• Demonstrated the superior electrochemical performance of few-layer MoS₂ nanosheets.

Conclusions:

• Ultrasonicated ball milling is an effective technique for producing high-quality MoS₂ nanosheets.
• Few-layer MoS₂ nanosheets offer significant improvements in capacity retention for LIBs.
• This method facilitates the commercialization of MoS₂-based anode materials.