Binder-Free Electrode based on Electrospun-Fiber for Li Ion Batteries via a Simple Rolling Formation

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Increasing demand for higher energy density and smaller lithium-ion batteries (LIBs).
• Need for high specific capacity active materials and reduced inactive materials in LIB electrodes.
• Current electrode fabrication methods face challenges in achieving both high performance and long-term stability.

Purpose of the Study:

• To develop a universal, cost-effective, and versatile strategy for fabricating binder-free LIB electrodes.
• To enhance the structural stability and electrochemical performance of LIB electrodes.
• To provide a method suitable for experimental research and practical applications.

Main Methods:

• A novel method involving rolling electrospun membranes directly onto commercial current collectors.
• The rolling process densifies the fiber web while preserving its porous structure.
• The method is compatible with various polymerizable adhesive polymers and composite materials.

Main Results:

• Binder-free electrodes with significantly improved structural stability compared to direct carbonized membranes.
• Electrodes demonstrate stable cycling for over 2000 cycles at a high current density of 2500 mA g⁻¹.
• The developed method is versatile, applicable to different materials and composites.

Conclusions:

• The rolling technique offers a cost-effective and adaptable approach for manufacturing high-performance LIB electrodes.
• This strategy addresses key challenges in LIB electrode design, improving energy density and stability.
• The findings pave the way for advanced LIBs in various applications.