IL Files Key Patent for Core Technology Enabling Continuous Mass Production of Lithium Metal Anodes
Current Density Variation Reduced by 93%… Inhibits Lithium Dendrite Formation
Secured Mass Production Technology Based on Continuous Roll-to-Roll Process
Simultaneous Acquisition of Core Technologies in Materials, Processes, and Equipment
[Edaily Reporter Kim Ji-wan] #IL announced on the 16th that it has filed a patent for core proprietary technology for the continuous mass production of next-generation lithium-metal batteries.
This patent (title: “Lithium-metal anode comprising a dual-functional protective layer with improved ionic conductivity and physicochemical stability, and a method for its continuous manufacturing”) covers core technologies that suppress the formation of lithium dendrites—considered the biggest challenge in the commercialization of lithium-metal batteries—and include continuous manufacturing technologies capable of mass production.
Core technology for the continuous mass production of lithium metal anodes. (Courtesy of IL)
Lithium metal is attracting attention as a core material for batteries used in humanoid robots and next-generation mobility due to its ability to achieve higher energy density compared to conventional graphite anodes.
IL has developed a dual protective layer (DPL) structure that simultaneously ensures ionic conductivity and physical stability. This design is engineered to uniformly guide lithium-ion migration and suppress dendrite formation.
Simulation results showed that applying the DPL structure improved current density variation by approximately 93% compared to conventional lithium metal anodes (Bare-Li). The current density variation decreased from ±45% to less than ±3%, and the company explained that the significant reduction in current concentration (hot spot) phenomena is expected to improve battery life and safety.
This patent is particularly significant as it encompasses not only material technology but also continuous roll-to-roll (R2R) production processes without vacuum interruption and manufacturing equipment technology. IL stated that through this, it has secured mass-production-ready technology capable of future large-scale manufacturing.
IL is currently working to establish a next-generation battery platform applicable to humanoid robots and physical AI systems, based on all-solid-state batteries, lithium-metal anodes, and 3D current collector technology.
A company official stated, “This patent represents a technology that simultaneously enhances the performance of lithium-metal anodes and secures mass production capabilities,” adding, “We expect it to serve as a foundation for accelerating the commercialization of high-energy-density batteries required for the era of humanoid robots and physical AI.”
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