Professor Young Soo Yoon of the Department of Materials Science and Engineering's Energy Materials Lab has developed an untra-stable solid electrolyte for lithium metal and all-solid-state batteries.

▲Graduate students Haeun Kang, Minwook Kim, and Suhyeong Kim from the Department of Materials Science and Engineering 

A research team led by Professor Young Soo Yoon of the Department of Materials Science and Engineering has developed an ultra-stable solid electrolyte material applicable to lithium metal and all-solid-state batteries. The results were published on the 22nd in the Chemical Engineering Journal (IF 13.2, top 3% of JCR, Q1), an international academic journal in the field of chemical engineering.

This research was conducted at the Energy Materials Laboratory (EML) at Gachon University and led by graduate students Haeun Kang, Minwook Kim, and Suhyeong Kim. The paper is titled "Reducing Li₂CO₃ Formation and Enhancing Ionic Conductivity in Garnet Electrolytes via Molten Salt Synthesis for Lithium Metal Batteries."

The research team applied Molten Salt Synthesis (MSS) to address solid electrolyte surface degradation and the resulting reduction in ion mobility, both of which have been identified as issues in lithium metal and all-solid-state batteries. Through this, the oxide-based solid electrolyte controlled the formation of lithium carbonate (Li₂CO₃) on the surface when exposed to air, and induced the formation of a stable crystal structure.