A material technology has been developed that replaces silver (Ag), which was an expensive material for precipitation-type cathode-based all-solid-state batteries, while improving performance and lifespan, and is expected to contribute to the future commercialization of all-solid-state batteries.


The Korea Electronics Technology Institute (KETI, President Shin Hee-dong) announced on the 12th that it has developed a novel magnesium fluoride-based precipitation-type anode technology applicable to all-solid-state batteries through cooperation with LG Energy Solution. This research achievement was selected as a cover article for an international academic journal in the field of materials chemistry.

All-solid-state batteries are next-generation batteries utilizing sulfide-based solid electrolytes and are attracting attention as a game changer that surpasses conventional lithium-ion batteries in terms of safety and energy density. International competition to secure the technology for commercialization is intensifying.

Conventional precipitation-type anode-based all-solid-state batteries utilizing silver and carbon have excellent lifespan and characteristics, but mass production has been difficult due to the high cost of silver and the complexity of the manufacturing process. Magnesium is a material that can replace silver and can form a solid solution with lithium metal.

The KETI Next-Generation Battery Research Center succeeded in manufacturing a precipitation-type anode material by stabilizing magnesium in the form of fluoride and synthesizing it on the surface of carbon particles. The research team confirmed that uniformly distributed magnesium fluoride forms a magnesium alloy during battery operation, helping the movement of lithium ions from the cathode.

Dr. Jung Yoon-chae's team stated, "We have confirmed the potential of a new all-solid-state battery system by improving battery characteristics through the introduction of magnesium fluoride," adding, "We will strive to develop new materials and processes for all-solid-state batteries in the future."

The results of this study were published in the latest issue of Advanced Energy Materials, a world-renowned academic journal in the energy field, and achieved the feat of being selected as a front cover article.

Center Director Yoo Ji-sang stated, “KETI is conducting extensive research covering not only all-solid-state battery materials and electrode component technologies but also battery manufacturing technologies,” adding, “As a key domestic research institution, we will focus on research for the commercialization of all-solid-state batteries.”

This technology was developed with the support of LG Energy Solution and the Industrial Technology Alchemist Project of the Korea Institute of Planning and Evaluation for Industrial Technology.