All-solid-state batteries have excellent heat resistance and no risk of explosion.
Saenggiwon succeeds in developing an integrated composite anode material.
Minimizes interparticle interfacial resistance, making it advantageous for high output.


Safety is a paramount issue for lithium-ion batteries, which are used as power sources for electric vehicles and renewable energy energy storage systems (ESS). Commercial lithium-ion batteries use highly flammable liquid electrolytes, posing a risk of explosion if overheated or damaged.

On the other hand, all-solid-state batteries based on solid electrolytes are attracting attention as next-generation batteries due to their excellent heat resistance and durability and no risk of fire or explosion.

On the 26th, the Korea Institute of Industrial Technology (KITECH) succeeded in developing an 'integrated composite cathode material' that can maximize the energy density of oxide-based all-solid-state batteries, while also increasing safety and output performance.

The developed material can significantly reduce the interfacial resistance between particles within the electrode, which has been pointed out as the biggest drawback of existing solid-state batteries, making it advantageous for high output. In addition, since it is a composite material in which the positive electrode active material and solid electrolyte are integrated, high-density electrode manufacturing is also possible.

The cathode structure of an oxide-based solid-state battery is largely composed of △ a solid electrolyte and a 'conductive material' responsible for electronic conduction, △ an 'active material' that determines the battery capacity, and △ a 'binder' that binds these together to physically stabilize the electrode.

Dr. Jinseop Lim's research team at the Smart Energy Nano-Fusion Research Group of the Korea Advanced Institute of Science and Technology (KAIST) has developed a process for coating lithium-lanthanum-zirconium-oxygen (LLZO), one of the oxide-based solid electrolytes, around high-nickel (NCM80) cathode active material particles using a Couette-Taylor reactor.

This process eliminates the need to separately place a solid electrolyte within the electrodes of an all-solid-state battery, thereby reducing the volume of the battery and allowing that volume to be used to place active materials, maximizing energy density.

Dr. Lim Jin-seop said, “Recently, the research and development focus on all-solid-state batteries is shifting to simultaneously achieving safety and energy density,” and explained, “We have developed a cathode material that has improved both output performance and safety, bringing us closer to commercializing oxide-based all-solid-state batteries.”
/> Meanwhile, the results of this study were published in October in the Journal of Material Chemistry A under the topic of the effect of cathode surface modification on oxide-based all-solid-state batteries.