South Korean battery manufacturer SK On said that the company cooperated with Professor Hee Jung Park of Dankook University in South Korea to coat Li-La-Zr-O with a controllable additive to make its ionic conductivity 70% higher than before.
According to reports, compared with the 4.3V of lithium-ion batteries, the capacity of this type of battery can also be increased to 5.5V. Note: This research result has been published in the IF19.9 issue of Advanced Functional Materials, a sub-journal of Advanced.
SK On said that while increasing the lithium-ion conduction speed would reduce stability, the company employed technology to uniformly control the microstructure of LLZO.
Long-term exposure of conventional solid electrolytes to water and carbon dioxide is said to cause performance degradation, but this electrolyte has shown high stability, and SK On is currently developing polymer oxide and sulfide solid-state batteries.
Although the oxide solid electrolyte has lower ion conductivity than the sulfide electrolyte, it is less reactive to the cathode material and can control the formation of lithium dendrites, the company said, and the graphite anode can be replaced with metallic lithium.
The company plans to have a prototype by 2026 and start mass production in 2028. It is worth mentioning that its laboratory in Daejeon is building a battery test line, which is expected to be put into use next year.