Layer-by-Layer Self-Assembled Nanostructured Electrodes for Lithium-Ion Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Precise nanoscale control over electrode component assembly is crucial for novel energy storage architectures.
• Current fabrication methods for lithium-ion batteries (LIBs) have limitations in achieving complex 3D nanostructures.

Purpose of the Study:

• To present aqueous layer-by-layer (LbL) self-assembly as a method for advanced LIB electrode fabrication with nanoscale precision.
• To demonstrate the potential for designing diverse battery architectures beyond conventional planar systems.

Main Methods:

• Utilizing aqueous dispersions for layer-by-layer (LbL) self-assembly of electrode materials.
• Achieving nanometer-level spatial precision in positioning ion-intercalating and electron-conducting phases.
• Employing cationic polyelectrolytes of varying molecular sizes to tailor nanostructures.

Main Results:

• Fabrication of a lithium titanate anode with a specific capacity of 167 mAh g⁻¹ at 0.1C.
• Demonstrated comparable performance to slurry-cast electrodes at high current densities (up to 100C).
• Engineered advanced multilayered nanostructures for optimized electrode performance and built a mechanically resilient full-cell LIB.

Conclusions:

• Aqueous LbL self-assembly offers a greener and highly precise route for fabricating advanced LIB electrodes.
• This method provides significant flexibility in designing complex 3D nanostructures for improved battery performance.
• The developed technique facilitates the creation of high-performance LIBs with enhanced mechanical properties.