Li-ion batteries based on liquid electrolytes are mainly used for batteries for electric vehicles and energy storage devices. However, as battery safety issues have recently been raised several times, various concerns about the use of existing batteries using flammable liquid electrolytes have increased. To solve this safety issue, all-solid-state battery technology, in which all battery components are replaced with solid materials, has recently attracted great attention. Dr. Kim’s research team at KIST has developed a solid electrolyte with superionic conductivity using a sulfide-based crystalline structure called argyrodite. Credit: Korea Institute of Science and Technology (KIST)

A fast Li-ion conducting solid electrolyte material comparable to the liquid electrolytes used in typical batteries. An innovative synthesis developed for a Li-ion superconductor without any compromise between productivity and material performance.

Dr. Hyoungchul Kim’s research team, from the Center for Energy Materials Research at the Korea Institute of Science and Technology (KIST, Acting President Yoon, Seok-jin), have successfully developed a sulfide-based superionic conductor that can be used to a high-performance solid electrolyte in all-solid-state batteries.

The research was supported by the Dual Use Technology Program of the Institute of Civil Military Technology Cooperation granted financially resources from the Ministry of Trade, Industry and Energy (Ministrer Sung, Yun-mo) and the Defense Acquisition Program Administration (Minister Wang, Jung-Hong). This work was also supported by the Institutional Research Program of the Korea Institute of Science and Technology and the Technology Development Program to Solve Climate Changes of the National Research Foundation funded by the Ministry of Science and ICT (Minister Choi, Ki-young). The results of this study have been published online in Nano Letters (IF: 12.279, top 5.743% of JCR), a prestigious international journal in the areas of nanoscience and nanotechnology.