SK Inno and Georgia Tech to develop all-solid-state batteries

A solid electrolyte that is flexible and operates at room temperature… Securing both performance and safety

ⓒSK innovation

SK Innovation is accelerating the development of an all-solid-state battery called a ‘dream battery’ in cooperation with a team led by Professor Seung-woo Lee of Georgia Tech.

SK Innovation announced on the 16th that it had decided to cooperate with Professor Seung-woo Lee’s team to develop an all-solid-state battery.

An all-solid-state battery is a battery in which the liquid electrolyte currently used in batteries is replaced with a solid one. It is attracting attention as a next-generation battery because it can reduce weight, volume, and fire risk while increasing battery capacity.

Professor Lee developed a rubber-type polymer solid electrolyte jointly with the Korea Advanced Institute of Science and Technology (KAIST), and his thesis was published in the world-renowned academic journal Nature on the 13th.

The solid electrolyte developed by Professor Lee increased the ionic conductivity 100 times, which was considered a weakness of the existing solid electrolyte, and secured rubber-like elasticity.

Ion conductivity is a measure of how well ions can move inside a battery. The higher the ionic conductivity, the faster the lithium ions inside the battery are transferred.

In addition, if the solid electrolyte has excellent elasticity, safety can be secured because the electrolyte is not damaged from dendrites, where lithium grows sharply like tree branches inside the battery.

The solid electrolyte developed by Professor Lee’s team is evaluated as an innovative research achievement, as realization of a solid electrolyte that secures ionic conductivity and safety at the same time has been considered a challenge.

The introduction of this technology is expected to increase the driving range of electric vehicles from 500 km to 800 km on a single charge.

SK Innovation plans to accelerate the development of all-solid-state batteries by adding the research results of Professor Lee’s team to the previously independently secured technology.

In October of last year, SK Innovation started developing all-solid-state batteries that can be manufactured at US Solid Power and existing lithium-ion battery production facilities. Since 2020, we have been collaborating with Professor John Goodenough of the University of Texas at Texas, who is well-known as a Nobel Laureate.

Lee Seong-joon, head of SK Innovation’s Institute of Environmental Science and Technology, said, “In cooperation with Professor Seung-woo Lee’s team, who has achieved outstanding research results, we will advance the era of all-solid-state batteries, which are called the batteries of dreams, and strengthen technological competitiveness.”

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