Printable Single-Ion Polymer Nanoparticle Electrolytes for Lithium Batteries.

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Science

Background:

• Current lithium batteries require advanced materials for enhanced safety and manufacturing.
• Polymer separators are crucial components in battery design, influencing performance and safety.

Purpose of the Study:

• To develop an extrusion-printable polymer separator for lithium batteries.
• To create single-ion polymer electrolytes using functionalized nanoparticles.
• To evaluate the performance of these electrolytes in lithium battery applications.

Main Methods:

• Synthesis of methacrylic polymeric nanoparticles (NPs) via emulsion copolymerization.
• Functionalization of NPs with lithium sulfonamide groups.
• Preparation of polymer electrolytes by mixing NPs with plasticizers (sulfolane, carbonates).
• Characterization using electron microscopy, ionic conductivity measurements, and electrochemical testing.

Main Results:

• Achieved polymer NPs with sizes less than 30 nm.
• Demonstrated ionic conductivities ranging from 2.9 × 10⁻⁴ to 2.3 × 10⁻⁵ S cm⁻¹ at 85 °C.
• Successfully printed a sulfolane-based polymer electrolyte using direct ink writing.
• Exhibited favorable electrochemical properties, including ionic conductivity, lithium transfer number, and cyclability.

Conclusions:

• The developed single-ion polymer electrolytes are suitable for printable battery separators.
• The extrusion-printable nature facilitates direct integration with battery electrodes.
• These materials show promise for enhancing the safety and manufacturability of lithium batteries.