CIS Signs Solid Electrolyte Technology Transfer Agreement with KETI

[Asia Economy Reporter Hyunseok Yoo] CIS announced on the 21st that it has signed a technology transfer agreement with the Korea Electronics Technology Institute (KETI) regarding the enhancement of the characteristics of solid electrolytes, a core material for all-solid-state batteries.

The company will receive technology for sulfide-based solid electrolyte materials used in all-solid-state batteries from KETI. Through this contract, CIS has secured manufacturing technology for solid electrolytes that possess high ionic conductivity while significantly improving atmospheric stability.

In April 2017, CIS took the lead as the main institution for the Ministry of Trade, Industry and Energy’s Materials and Components Technology Development Project titled “Development of inorganic solid electrolyte materials for high-safety energy storage devices to realize 0.8mS/cm-class high ionic conductor films and large-area cells,” and began material development. As the main institution, CIS was responsible for developing mass production processes for solid electrolytes, while participating institution KETI was in charge of developing new material technologies.

Sulfide-based solid electrolytes are sensitive to moisture, requiring very strict control of the manufacturing environment, typically produced in super dry rooms with low dew points or glove boxes filled with inert gases. Through research aimed at improving the manufacturing process environment, KETI succeeded in developing a solid electrolyte composition that enables high ionic conductivity and reduces hydrogen sulfide gas generation to about one-quarter, thereby enhancing atmospheric stability and increasing the potential for process improvements.

CIS has been advancing process development for mass production of solid electrolytes. In April, it took the lead in the Ministry of Trade, Industry and Energy project titled “Development of composite materials and electrode component manufacturing technology for ceramic secondary batteries with 7mAh/cm2-class high energy density electrode sheets,” developing electrode processes and process equipment for all-solid-state batteries. Additionally, CIS has participated in the “Development of manufacturing equipment for all-solid-state battery cells larger than 50 cm2” project, initiating the development of assembly equipment for all-solid-state batteries.

CEO Suha Kim stated, “Through this agreement, we have secured proprietary solid electrolyte technology with greatly improved atmospheric stability, and based on this, we plan to more than double our current monthly production of 70kg of solid electrolytes by next year. Moving forward, in line with the expansion of the all-solid-state battery market, we will focus more on designing and building automated production lines for solid electrolyte manufacturing.”

Meanwhile, all-solid-state batteries are evaluated as an optimal technology for large batteries used in electric vehicles, offering more than twice the energy density of lithium secondary batteries without the risk of fire. In particular, sulfide-based solid electrolytes, known as materials suitable for manufacturing high-capacity large batteries, are expected to become core materials in the future electric vehicle battery market.

This content was produced with the assistance of AI translation services.