This technology utilizes a protective layer composed of a CMC polymer matrix with polar groups and LiNO3 lithium salt, placed between the lithium metal anode and the sulfide-based solid electrolyte. It prevents direct contact between the two materials and reduces interfacial resistance, thereby suppressing dendrite growth.
Lithium metal is highly reactive, and sulfide-based solid electrolytes are chemically unstable, leading to side reactions at the interface where they meet. Furthermore, the growth of lithium dendrites during charge and discharge cycles causes short circuits and limits battery lifespan.
This technology creates a 20–60㎛ thick anode protective layer by dispersing LiNO3 within a CMC polymer matrix at a weight ratio of 10:1 to 20:1, allowing the layer to serve as both an ion pathway and a physical barrier. The cell is completed by stacking an argyrodite-structured solid electrolyte layer and a composite cathode onto the protective layer. Applicable to lithium metal anode processes for automotive and cell manufacturers developing sulfide-based all-solid-state batteries, it enables the implementation of a low-cost interfacial protective layer using only water-based polymers and common lithium salts.
This technology is a battery operation method that forms a layer of linear lithium deposits with a small surface area by first creating spherical or hemispherical lithium nuclei at a low current density on the anode current collector, then switching to a high current density to induce plastic deformation.
Lithium metal anodes have historically faced issues with lithium dendrite growth and continuous side reactions at the lithium-electrolyte interface. These challenges have resulted in low coulombic efficiency, short battery lifespan, and reduced energy efficiency.
This technology divides the charging process into two stages: a first current density stage at 0.1–0.3 times the average current density, and a second stage at 1.5–2 times the average. The initial lithium nuclei are subjected to plastic deformation by the subsequent high current. The resulting 2–3㎛ wide linear lithium deposits minimize contact with the electrolyte, significantly reducing side reactions. Applicable to anode-free lithium secondary battery charging protocols, BMS charging algorithms, and battery formation processes, this method boosts coulombic efficiency by adjusting the charging current sequence without requiring changes to cell materials.
This technology incorporates a fluorine and chlorine-substituted 1,3-dioxolane additive into the lithium-sulfur battery electrolyte. During charging, this forms a composite SEI layer containing both LiF and LiCl on the lithium metal anode surface, effectively suppressing lithium dendrite growth.
In lithium-sulfur batteries, lithium metal anodes are prone to dendrite growth during repeated charge-discharge cycles, posing risks of short circuits and fires. Additionally, rapid electrolyte consumption has historically limited battery lifespan.
This technology adds 0.5–10 wt% of 4,4,5,5-tetrachloro-2,2-difluoro-1,3-dioxolane to the electrolyte to create an SEI layer at the anode interface that combines LiCl for fast ion diffusion and LiF for high mechanical strength. The resulting poly(dioxolane) polymer provides flexibility to absorb anode volume changes. Applicable to lithium-sulfur batteries and various lithium-metal batteries using ether-based electrolytes, this single additive enables the in-situ formation of a protective film that balances strength and ion conductivity.
This invention was developed with support from the Ministry of Science and ICT for the development of core technologies for high-energy-density lithium metal batteries based on the design of natural organic/inorganic composite membrane formation reactions.
This technology involves coating a porous support with a mixture of cellulose nanofibers, which form a continuous chain-entangled structure, and cellulose nanocrystals, which act as a dispersed phase. This allows for the simultaneous achievement of thermal stability, puncture strength, and air permeability in a separator without the need for inorganic particles.
Conventional inorganic particle coating methods often suffer from reduced air permeability due to the use of acrylic or rubber-based adhesives. While using cellulose nanocrystals alone can improve puncture strength, it significantly lowers air permeability, leading to a trade-off that impairs ionic conductivity.
This technology forms a cellulose coating layer using a solvent mixture of water and an organic solvent with a higher boiling point, such as NMP, which creates micropores within the coating layer during the drying process. This ensures high air permeability while maintaining excellent puncture strength and thermal stability. Applicable to high-rate cells for fast charging and large-scale cells for energy storage systems, this technology achieves both an air permeability of Gurley 600 s/100cc or less and a puncture strength of 5 N or more in a single separator.
This invention was developed with support from the Korea Forest Service for the design and manufacturing technology of nanocellulose-coated separators.
This technology is a solid electrolyte that enhances ionic conductivity and interfacial stability by using a covalent organic framework (COF) introduced with lithium-ion conductive functional groups as a scaffold and building lithium-ion channels through a polyalkylene oxide-based cross-linked polymer formed within its pores.
Conventional inorganic solid electrolytes suffer from low flexibility, high interfacial resistance with electrodes, and vulnerability to dendrite growth. Polymer solid electrolytes have limitations in high-voltage cathode applications due to low room-temperature ionic conductivity and a narrow electrochemical window.
This technology involves mixing a COF structure containing repeating units with lithium salts and a polyfunctional polyalkylene oxide monomer into a slurry, which is then pressurized, polymerized, and cross-linked to form a continuous 3D cross-linked polymer network within the COF pores. Applicable to all-solid-state lithium batteries using high-voltage cathodes and thin-film solid electrolyte cells under 100㎛, this technology simultaneously leverages the flexibility of polymers and the regular ion channels of crystalline frameworks in a single membrane.
This invention was developed with support from the Ministry of Science and ICT for a single-ion conductor-based multidimensional free-form power system.
This technology creates an orthorhombic NaAlCl4 compound by mixing sodium chloride (NaCl) and aluminum chloride (AlCl3) through a ball milling process, forming new sodium sites (Na2) to enhance ionic conductivity and electrochemical stability.
Existing sodium solid electrolytes suffer from high costs and low room-temperature ionic conductivity. Furthermore, they face limitations such as severe decomposition reactions when operated at high voltages of 3–4V or higher, leading to instability at the interface between the cathode and the electrolyte.
This technology synthesizes a NaAlCl4 solid electrolyte with artificially created Na2 sites within the crystal structure using only a 600–650 rpm ball milling process for 10–11 hours, without heat treatment. It enables the implementation of all-solid-state batteries operating at 3–4V or higher by incorporating this material into the cathode, anode, or electrolyte layer. Suitable for large-scale sodium-based ESS and low-cost all-solid-state cells that reduce reliance on lithium, this technology provides high-voltage-compatible electrolytes using inexpensive chloride raw materials and a single grinding process.
This invention was developed with support from the Ministry of Economy and Finance for the development of 600Wh/L-class large-area all-solid-state battery bridge technology for EVs.
This technology enhances structural stability and electrochemical performance in cobalt-free, nickel-manganese-based layered cathode materials by introducing cation ordering at the particle surface and controlling the H2-H3 phase transition in the 4.12V–4.6V range.
Conventional nickel-rich cathode materials rely on expensive cobalt, leading to high production costs. Furthermore, irreversible phase transitions during high-voltage charging cause micro-cracks within the particles and structural instability, which degrades long-term cycle performance.
This technology utilizes a cobalt-free LiaNixMnyO2 (0.5≤x≤0.99, 0.01≤y≤0.5) composition and forms a cation-ordered structure within 2㎛ of the secondary particle surface, where lithium and transition metals are regularly swapped. By optimizing the H2-H3 phase transition under charging conditions above 4.4V and increasing particle strength to 120–250MPa, it ensures superior rate capability and thermal stability. It is ideal for mass-producing EV cathode materials and developing high-voltage cells, enabling both cost reduction and stable operation at voltages above 4.4V.
This technology incorporates an additive with isocyanate (-N=C=O) functional groups into the lithium-sulfur battery electrolyte. It selectively reacts with lithium polysulfides dissolved from the cathode to create an ion-conductive polymer layer at the interface between the electrode and the separator.
In lithium-sulfur batteries, lithium polysulfides generated at the cathode during discharge dissolve into the electrolyte and diffuse to the anode. This leads to reduced capacity and side reactions that corrode the anode, ultimately degrading cycle life and electrochemical performance.
This technology involves adding 1 to 5 parts by weight of an isocyanate-based additive, such as hexamethylene diisocyanate (HDI), per 100 parts by weight of the electrolyte. The additive reacts chemically with lithium polysulfides to form a polymer membrane on the surfaces of the cathode and separator, physically and chemically blocking further polysulfide dissolution. A key advantage is that it can be applied to existing lithium-sulfur cell production lines using ether-based electrolytes, enabling shuttle suppression simply by adding the additive without requiring changes to electrodes or separators.
This invention was developed with support from the Ministry of Science and ICT for the optimal design of high-ion-conductivity solid electrolytes with 3D ion channels and high-capacity electrodes.
This technology maximizes structural stability in cathode active materials composed of secondary particles (agglomerates of primary particles) by simultaneously forming a coating layer containing heteroatoms like tin (Sn) at grain boundaries and a doped region where these heteroatoms are diffused within the particles.
Sodium-ion batteries have historically suffered from shortened lifespans due to crystal structure transitions caused by changes in the oxidation state of transition metals during charge and discharge cycles. High-voltage charging also leads to micro-cracks and side reactions with the electrolyte, resulting in the formation of rock-salt phases on the surface and increased resistance.
This technology involves creating a nickel-cobalt-manganese-based transition metal hydroxide through primary co-precipitation, followed by secondary co-precipitation with a tin compound to introduce heteroatoms to the particle surface, which is then calcined with a sodium compound. This process creates Sn doping inside the particles and a Na-Sn-O nano-coating on the surface, which relieves structural stress and prevents electrolyte penetration and micro-cracking. It enables high-capacity sodium cell designs that maintain performance even at 4V, making it ideal for large-capacity ESS, low-cost electric scooters, and residential energy storage systems that require reduced reliance on lithium.
This invention was developed with support from the Ministry of Science and ICT for the development of core and commercialization technologies for interface-optimized, rod-shaped secondary battery materials.
This technology disperses lithium-affinity metal or metal-oxide-based 1D nanorod structures within a lithium matrix to accelerate the replenishment of lithium ions from the electrode interior to the interface, while maintaining stable interfacial contact area.
Lithium metal anodes have historically suffered from uneven lithium deposition, leading to dendrite growth and the formation of voids at the electrode-electrolyte interface. These issues cause short circuits and limit both battery lifespan and energy efficiency.
This technology involves mixing and reacting lithium-affinity metal oxide nanoparticles, such as ZnO or TiO2, with lithium above its melting point to create nanorod structures consisting of an oxide core and a Li-metal alloy/Li2O shell, which are then dispersed in multiple directions within the lithium matrix. These nanorods, which exhibit high ionic conductivity along their length, serve as internal diffusion pathways that simultaneously reduce interfacial voids and dendrite formation. Applicable to both sulfide/oxide-based all-solid-state batteries and liquid-electrolyte lithium-metal batteries, this internal anode structure effectively compensates for contact loss issues common at solid interfaces.
This technology incorporates both lithium silicate and a transition metal-silicon alloy into the microstructure of a silicon-based anode active material to structurally buffer silicon volume expansion during charge/discharge cycles while ensuring ionic conductivity and mechanical stability.
Silicon undergoes volume changes of up to 300% during lithium insertion and extraction, leading to cracking on the surface of the active material and electrical isolation. This results in low capacity retention and poor thermal stability during high-temperature storage.
This technology involves ball-milling silicon monoxide with a transition metal precursor followed by heat treatment to create a transition metal-silicon alloy. This is then mixed with a lithium precursor and heat-treated again to produce a composite anode active material with the alloy uniformly dispersed within a lithium silicate structure. The alloy content is controlled at 1.6–10 wt%, the specific surface area at 4.85–6.69 m²/g, and the porosity at 0.0302–0.0330 cm³/g. Applicable to high-capacity anodes for long-range EVs, compact high-density cells for smartphones, and industrial batteries for high-temperature environments, it allows for higher silicon content while reducing capacity loss caused by particle cracking.
This technology addresses the brittleness and interfacial instability of sulfide-based solid electrolytes. By impregnating a porous scaffold with a specific pore size with a sulfide-based solid electrolyte, a cross-linked polymer matrix, and a lithium salt-coordinated solvate ionic liquid, it achieves flexibility and creates continuous ion-conduction pathways between inorganic particles.
While sulfide-based solid electrolytes offer high ionic conductivity, their rigid and brittle nature makes them difficult to manufacture as thin films and limits their flexibility. Furthermore, they face challenges such as high interfacial resistance with electrodes and susceptibility to dendrite growth.
This technology involves applying a solvent-free slurry—composed of a sulfide-based solid electrolyte, a multifunctional monomer for a cross-linked polymer matrix, a solvate ionic liquid, and a lithium salt—onto a porous scaffold with an average pore size of 50㎛ or larger, followed by photocuring to create an integrated composite membrane. Suitable for flexible all-solid-state batteries and thin power sources for wearable devices, this technology provides electrolyte membranes thinner than 40㎛ that retain over 90% of their ionic conductivity even after 100 cycles of 180° bending.
This invention was developed with support from the Ministry of Science and ICT for a single-ion conductor-based multidimensional free-form power system.
This technology creates a highly conductive active material layer composed of a first silicon-based active material and carbon on an anode current collector. By placing a 3D lattice structure of a second silicon-based active material with relatively lower electrical conductivity on top, it directs charging current to the bottom of the pores, inducing uniform nucleation and vertical growth of lithium.
Lithium metal anodes have historically faced issues with dendrite growth and volume expansion due to uneven current density during charging and discharging. These limitations have increased the risk of fire and explosion while shortening battery lifespan.
This technology is designed so that the electrical conductivity of the active material layer is 60 to 80 times higher than that of the 3D lattice structure, ensuring that lithium ions are deposited sequentially from the surface of the active material layer at the bottom of the pores upward. Additionally, silicon nanoparticles provide lithiophilic sites, enhancing both the uniformity and reversibility of lithium deposition. Applicable to high-energy-density metal batteries and lightweight cells for drones and electric aircraft, this technology reduces fire risks associated with dendrite growth and absorbs volume changes during cycling within the lattice's internal space.
This technology enhances air stability and ionic conductivity by wet-synthesizing metal-substituted sulfide solid electrolytes. It involves dissolving metal chalcogenides in a co-solvent mixture of amine and thiol, followed by a reaction with lithium-based and sulfide-based precursors.
Conventional wet synthesis methods struggle with poor raw material solubility, making it difficult to control the composition of the solid electrolyte. Furthermore, they suffer from limited air stability due to the generation of hydrogen sulfide (H2S) gas upon reaction with moisture.
This technology utilizes a co-solvent of 1,2-ethylenediamine and 1,2-ethanedithiol in a 7–12:1 volume ratio to fully dissolve metal chalcogenides like SnS2. By reacting this with precursors and performing vacuum heat treatment, it produces solid electrolytes substituted with elements such as Sn, Sb, and Zn, resulting in a dense structure and superior air stability. This technology can be applied to mass production processes for all-solid-state batteries that require reduced dry room management, as well as automotive all-solid-state cells, improving both handling safety and process yield by minimizing hydrogen sulfide generation upon air exposure.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of high-voltage battery systems for electric vehicles capable of ultra-fast charging in approximately one minute.
This technology features an anode composed of a lithium-repelling 2D nanocarbon membrane and a rod-shaped, lithium-friendly 3D catalyst on one side. It physically suppresses dendrite growth by forcing lithium ions through the membrane holes to deposit only in the space between the current collector and the membrane.
In lithium metal anodes, repeated cycling often leads to dendrite growth, which can pierce the separator and cause internal short circuits. Uneven lithium deposition and stripping also result in shortened battery life and increased explosion risks.
This technology uses a 2D nanocarbon membrane, such as graphene, with multiple 50–1000nm holes. A 3D rod-shaped catalyst made of metal or metal oxides like ZnO is grown on one side via hydrothermal synthesis and positioned to face the current collector. Consequently, lithium is deposited and stripped only in the space between the membrane and the current collector. Applicable to lithium metal batteries, anode-free cells, and high-power drone batteries, this method prevents separator penetration by pre-determining where lithium can grow.
