LG Chem Develops Technology to Boost All-Solid-State Battery Performance by 50%

Published in Advanced Energy Materials
Solving Internal Gaps and Ion Transport Issues
Controlling Particle Size with "Spray Recrystallization"

LG Chem has secured a core process technology that can significantly enhance the performance of all-solid-state batteries.

On November 25, LG Chem announced that it has developed "spray recrystallization" technology, which enables uniform control of the particle size of solid electrolytes-a key material for all-solid-state batteries. The company also revealed that the related research findings have been published in the global energy materials journal, Advanced Energy Materials. This research was jointly conducted by LG Chem’s Next-Generation Materials Research Center and the research team led by Professor Song Taeseop from the Department of Energy Engineering at Hanyang University. The achievement is being recognized for effectively resolving the issue of non-uniform electrolyte particles, which has been regarded as a major obstacle to the commercialization of all-solid-state batteries.

Shin Hakcheol, Vice Chairman of LG Chem. Photo by Hyunmin Kim

All-solid-state batteries replace the liquid electrolyte in conventional lithium-ion batteries with a solid electrolyte. While these batteries are structurally more stable and offer superior energy density, persistent concerns have been raised about performance degradation caused by microscopic gaps inside the cell when the particle size of the solid electrolyte is not uniform.

The research teams from LG Chem and Hanyang University addressed this challenge by applying spray recrystallization, a process in which the electrolyte solution is sprayed into fine droplets, allowing uniform spherical particles to form as the solvent evaporates. The key achievement lies in significantly reducing particle size deviation compared to existing processes and improving the adhesion between the electrolyte and the electrode.

According to the research, batteries using these uniform electrolyte particles exhibited a basic capacity increase of approximately 15% compared to previous versions, and a high-rate discharge capacity improvement of about 50%. High-rate discharge capacity is a critical indicator for applications in high-power electronic devices.

With this technological breakthrough, LG Chem plans to further accelerate the development of solid electrolytes and speed up the commercialization of all-solid-state batteries. Shin Hakcheol, Vice Chairman of LG Chem, stated, "This research represents a meaningful achievement in solving a core challenge for the commercialization of all-solid-state batteries," adding, "We will strengthen our competitiveness in next-generation battery technologies and lead the global market."

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