NU 2024-049

INVENTORS

Davy Zeng

Cory Thomas West

Mark C. Hersam*

SHORT DESCRIPTION

A novel method for producing kaolinite nanoplatelets to enhance the safety and efficiency of lithium metal batteries.

BACKGROUND

Traditional liquid electrolytes for lithium-ion batteries are highly flammable. Despite extensive research into less flammable solid-state electrolytes, few examples have been produced with earth abundant materials while concurrently providing sufficient performance for commercial viability. The use of a nanocomposite gel electrolyte consisting of kaolinite nanoplatelets resolves both issues. Nanosized kaolinite made from a scalable shear mixing method results in a low cost electrolyte with minimal supply chain concerns.

ABSTRACT

This technology outlines a scalable method for the production of kaolinite nanoplatelets (KNPs), which are used to create solid-state electrolytes for lithium metal batteries. The process includes mixing kaolinite with ethanol and a dispersing agent, centrifugation, and annealing to produce KNPs with a partial coating of oxidized amorphous carbon. This method results in a nonflammable, clay-based nanocomposite electrolyte that is safer and more efficient than current lithium-ion battery technologies.

APPLICATIONS

• High-rate rechargeable batteries for consumer electronics

• Energy storage solutions for renewable energy systems

• Advanced battery technologies for electric vehicles

• Broader applications in nanocomposite materials and coatings

ADVANTAGES

• Enhanced safety

  • composed of nonflammable materials

• Higher energy density:

  • More efficient than current lithium-ion battery technology

• Environmentally friendly and scalable production process

  • Use of earth abundant materials

• Potential for broader application

  • Readily applicable to nanocomposite materials and coatings