SK On develops the world's highest lithium ion conductivity solid electrolyte
According to BusinessKorea, SK Innovation battery subsidiary SK On has successfully jointly developed an oxide solid electrolyte with the highest lithium ion conductivity in the world.
On August 31st, SK on announced that the research results of oxide solid electrolytes developed jointly with Professor Park Hee Jung's research team in the Department of New Materials Engineering at the University of Honolulu were published on the cover of the globally renowned journal "Advanced Functional Materials (IF 19.9)". The joint research team of SK on and Tankoku University has completed domestic and international patent applications for this technology.
This solid electrolyte significantly improves the conductivity of lithium ions while ensuring atmospheric stability. The SK on Tanguo University research team increased the lithium ion conductivity by 70% by adjusting the additives of the oxide solid electrolyte material Li La Zr O (lithium lanthanum zirconium oxygen; LLZO), setting a new world record.
In addition, although an increase in lithium ion conductivity usually leads to a decrease in stability, the use of a unified control technique for LLZO microstructure can overcome this problem. Although solid electrolytes are usually sensitive to water (H2O) and carbon dioxide (CO2) and their performance decreases over time, this new type of solid electrolyte has excellent stability.
The battery capacity can also be significantly increased. Although the maximum operating voltage of liquid electrolytes used in lithium-ion batteries (LiB) is usually 4.3V, using oxide based solid electrolytes can increase it to 5.5V. In theory, this means that the battery capacity can be increased by up to 25%.
This solid electrolyte significantly improves the conductivity of lithium ions while ensuring atmospheric stability. The SK on Tanguo University research team increased the lithium ion conductivity by 70% by adjusting the additives of the oxide solid electrolyte material Li La Zr O (lithium lanthanum zirconium oxygen; LLZO), setting a new world record.
In addition, although an increase in lithium ion conductivity usually leads to a decrease in stability, the use of a unified control technique for LLZO microstructure can overcome this problem. Although solid electrolytes are usually sensitive to water (H2O) and carbon dioxide (CO2) and their performance decreases over time, this new type of solid electrolyte has excellent stability.
The battery capacity can also be significantly increased. Although the maximum operating voltage of liquid electrolytes used in lithium-ion batteries (LiB) is usually 4.3V, using oxide based solid electrolytes can increase it to 5.5V. In theory, this means that the battery capacity can be increased by up to 25%.