KAIST achieves breakthrough in solid-state Li-Ion battery to drive 800km on a single charge
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According to the study published in the international academic journal Nature on Thursday, the joint research team led by Kim Beom-jun, professor of the Department of Chemical and Bio-molecular Engineering at KAIST, and Lee Seung-woo, professor at Georgia Institute of Technology (Georgia Tech), has developed a new concept of solid-state electrolyte that can lead to the development of hitherto most advanced all-solid-state battery. The all-solid-state lithium battery, which changes the electrolyte between the anode and the cathode of a secondary battery from a high-risk liquid to solid, enables a large battery capacity and improves driving safety.
The joint research team has developed a rubber-type polymer electrolyte, or elastomeric electrolyte, that transmits ions at room temperature and applied it to the all-solid-state battery. Currently, electric vehicles can travel up to 500 km on a single charge, but if the newly developed all-solid-state lithium metal battery is installed, electric cars would be able to travel up to 800 km on a single charge, according to the research team.
"We have developed the world's best-performing all-solid-state battery, based on a solid electrolyte, which is completely different from the existing one,” said Professor Kim. “The newly developed electrolyte has dramatically improved the current problems and the manufacturing process is simple. I believe the new electrolyte will create a paradigm shift."
With rising interest in all-solid-state batteries, South Korean battery makers have been working with academia to develop next-generation battery technologies. SK Innovation is in discussions with Georgia Tech on joint research on new batteries. The company also announced a plan for joint development with John Goodenough, professor at the University of Texas and winner of the Nobel Prize in Chemistry in 2021.
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