Enhanced Lithium Storage Performance: Dual-Modified Electrospun Si@MnO@CNFs Composites for Advanced Anodes

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Silicon anodes are promising for lithium-ion batteries due to high capacity but face challenges like poor conductivity and volume expansion.
• Existing solutions involve coating silicon with carbon or metal oxides to mitigate degradation.

Purpose of the Study:

• To develop a novel bilayer-coated silicon-based anode material for improved lithium-ion battery performance.
• To address the capacity degradation issues of silicon anodes through advanced material design.

Main Methods:

• Utilized liquid-phase approach and electrostatic spinning to create Si@MnO@CNFs bilayer-coated silicon anode materials.
• Investigated the structural and electrochemical properties of the synthesized composite material.

Main Results:

• The Si@MnO@CNFs composite effectively reduced silicon's volume effect during cycling.
• The manganese oxide and carbon nanofiber coating enhanced electrochemical kinetics and conductivity.
• The anode maintained a high capacity of 994.4 mAh g⁻¹ after 1100 cycles at 2 A g⁻¹.

Conclusions:

• The developed Si@MnO@CNFs anode material demonstrates excellent stability and capacity retention for lithium-ion batteries.
• This bilayer-coating strategy offers a promising pathway for the practical application of silicon-based anodes.