LG Energy Solution has successfully developed next-generation battery technology that enables a driving range of 900 kilometers on a single charge.
On Dec. 7, a joint research team from LG Energy Solution and the Korea Advanced Institute of Science and Technology (KAIST) announced that they have developed core technology for lithium-metal batteries, which significantly increases the driving range by about 50% compared to lithium-ion batteries, and greatly improves charging and discharging efficiency and lifespan. Their research has been published in the scientific journal Nature Energy.
Lithium-metal batteries replace the graphite-based anode material with lithium metal, significantly reducing the weight and volume of the anode material compared to conventional lithium-ion batteries. They are attracting attention as the next generation of batteries due to their significantly increased energy density and driving range. However, dendrites forming on the anode surface and continuous corrosion from the liquid electrolyte have been pointed out as factors threatening the lifespan and safety of existing lithium-metal batteries. Dendrites refer to the branch-like accumulation of lithium on the anode surface during battery usage, which can hinder lithium-ion movement, reduce battery efficiency, and increase the risk of fire.
To solve this problem, the joint research team applied a “borate-pyran-based liquid electrolyte” for the first time in the world. This electrolyte reconstructs the solid electrolyte interphase formed on the surface of the lithium-metal anode during charging and discharging, blocking the corrosive reaction between the electrolyte and the lithium-metal anode. This has increased the charging and discharging efficiency of lithium-metal batteries and enhanced the energy density to the extent that a single charge can cover a driving range of 900 kilometers. The driving range of lithium-ion batteries used in high-performance electric vehicles is currently 600 kilometers. The lifespan stability of over 400 recharge cycles has also been achieved.