This technology synthesizes a lithium-based anode active material with improved electrochemical properties by weighing lithium, vanadium, and titanium sources in a specific molar ratio, pre-heat treating the vanadium source to achieve a single phase, and then mixing, pelletizing, and sintering the materials in a nitrogen and hydrogen reducing atmosphere.
Existing anode materials face limitations: silicon suffers from significant volume expansion during charge/discharge cycles, while lithium metal is prone to dendrite growth. These issues have hindered the development of new anode compositions and crystal structures capable of achieving both high capacity and high power output at low discharge potentials.
This technology involves a two-stage heat treatment of the vanadium raw material at 500–700°C and 1100–1300°C to achieve a single phase, followed by mixing with lithium and titanium sources and a two-stage sintering process in a 92% N2 and 8% H2 mixed gas atmosphere to produce Li1.075V0.925-xTixO2 (0
This technology is an anode active material that induces Li intercalation reactions while maintaining a single phase without secondary phases such as WO3 or MgO. It achieves this by doping a monoclinic magnesium tungsten oxide (MgWO4) base material (space group P 2/c) with Ni or Co and precisely controlling the atomic ratio of Mg to W (Mg/W).
Conventional AWO4-based anode active materials store lithium through conversion reactions during charge and discharge, which leads to issues such as pulverization of the active material, electrical shorts, unstable SEI formation, and volume expansion. Furthermore, simple doping often caused structural instability, resulting in the formation of secondary phases.
This technology ensures structural stability by substituting Ni or Co doping metals (0 < y ≤ 0.1) into an MgWO4 base material with an adjusted Mg/W atomic ratio of 1+x : 1-x (0 < x ≤ 0.025). As a result, a Li intercalation mechanism in a layered structure operates instead of a conversion reaction, achieving high capacity and long cycle life. It can be applied to lithium secondary batteries for power grid-connected ESS that require long life, and for electric vehicle anodes where particle pulverization must be avoided during fast charging. It provides design flexibility, allowing for increased doping levels without disrupting the pure crystalline phase.
This technology involves inserting a porous metal foil with an insulating coating layer between the anode and cathode and electrically connecting it to the electrode lead. This disperses current during an internal short circuit, suppressing heat generation while providing a stable ion pathway.
Conventional secondary batteries are prone to rapid exothermic reactions and fire risks during internal short circuits. While inserting a conductive sheet can mitigate this, it often blocks electrolyte movement, leading to reduced energy density or increased manufacturing complexity.
This technology places a porous metal foil, coated on at least one side with a metal oxide or insulating polymer, between the anode and cathode and connects it to the lead. This configuration disperses short-circuit current over a wide area while maintaining ion transport pathways for the electrolyte through the pores. Applicable to electric vehicle battery packs, energy storage systems, and next-generation cells using lithium metal anodes, it prevents thermal runaway during accidents such as nail penetration or crushing while minimizing energy density loss.
This technology features a porous framework formed by stacking angular, polyhedral porous carbon particles through line or surface contact. By incorporating lithium metal into the interior and the interstitial spaces of this framework, the technology ensures structural stability and effectively suppresses lithium dendrite growth.
Conventional slurry-cast anodes often suffer from structural collapse due to binder aggregation, poor active material adhesion, and non-uniform distribution. When used with lithium metal anodes, these issues lead to dendrite growth, resulting in shortened cycle life and reduced safety.
This technology utilizes electrophoretic deposition to uniformly deposit a binder and porous carbon particles—with a particle size distribution satisfying 1.1 ≤ D90/D10 ≤ 1.9—onto a current collector, creating a robust porous framework. By filling the pores with lithium metal, it facilitates stable lithium plating and stripping. It is suitable for lithium metal battery anodes, electric vehicle cells requiring fast charging, and high-energy pouch cells that necessitate thick electrodes, as the framework remains intact even in thick electrodes, thereby maintaining a long cycle life.
This technology involves mixing Ag or Au-based metal nitrate (Mx(NO3)y) additives into a lithium powder slurry. By inducing an alloying reaction with lithium, it lowers nucleation energy and forms a stable, Li3N-rich surface film, thereby promoting uniform lithium electrodeposition.
Conventional lithium foils have limitations in scaling up to large areas and suffer from lithium dendrite growth during repeated charge-discharge cycles. This leads to internal short circuits and electrolyte depletion, which significantly reduces battery lifespan.
This technology creates electrodes using a slurry containing lithium powder, a binder, and Mx(NO3)y additives. The Ag or Au provides active sites through lithium-friendly alloying reactions, while nitrate ions react with lithium to form a Li3N-rich film with excellent ionic conductivity and mechanical strength. Applicable to lithium metal secondary battery anodes, large-area pouch cells, and roll-to-roll coating-based mass production lines, it enables the uniform fabrication of large-area lithium electrodes through slurry coating alone, eliminating the need for foil rolling.
This technology introduces 1,1-diethoxyethane (DEE) as a solvent to replace or supplement conventional dioxolane (DOL) to enhance anode stability and suppress the polysulfide (PS) shuttle effect in lithium-sulfur batteries. Combining DEE with DME in a 20:80 to 80:20 volume ratio forms an optimized SEI layer.
Lithium-sulfur batteries have faced challenges with low electrical conductivity in sulfur cathodes and active material loss due to polysulfide dissolution in the electrolyte, leading to shuttle reactions. Furthermore, conventional electrolyte environments cause unstable lithium anode interfaces, resulting in dendrite growth, parasitic reactions, and short cycle life.
This technology utilizes an electrolyte composition of DEE and DME mixed in a 20:80 to 80:20 volume ratio. Due to the structural properties of DEE, a durable SEI layer with low Li2O content and high carbon/fluorine-based species forms on the anode surface. The electrolyte viscosity is controlled to suppress polysulfide migration and prevent parasitic reactions at the lithium anode. Applicable to lightweight lithium-sulfur cells for long-range drones, high-altitude UAVs, and aerospace, the simple design of adjusting the DEE ratio allows for balancing viscosity and ionic conductivity for specific applications.
This technology involves coating the surface of a polyethylene (PE) separator with a mixture of pulverized oyster shell powder—primarily composed of calcium carbonate (CaCO3)—and a PVDF binder. This process enhances the physical rigidity and hydrophilicity of the separator, effectively suppressing lithium dendrite growth.
Lithium metal batteries (LMBs) have historically faced issues with rapid lithium dendrite growth leading to internal short circuits. Furthermore, continuous electrolyte decomposition and thermal shrinkage of the separator at high temperatures have limited battery safety.
This technology forms a 2.0μm-thick coating layer on the PE separator surface by blade-casting a slurry made from pulverized oyster shells (containing CaCO3 and CaO). The coating improves thermal stability, electrolyte absorption, and wettability, while reducing side reactions at the lithium metal interface to ensure cycle life and safety. It is applicable to high-energy lithium metal batteries and lightweight cells for drones and wearables, contributing to an eco-friendly supply chain by recycling marine waste into low-cost ceramic materials.
This technology safely discharges waste lithium-ion batteries by passing them through compression rollers to create precise micro-cracks in the casing side, rather than shredding the entire unit. This allows water to slowly enter the electrolyte without damaging the separator.
Conventional saltwater immersion methods are excessively slow, while electrical resistance methods suffer from low efficiency due to the need for individual setups per battery. Furthermore, traditional shredding methods risk fire and explosion by damaging the separator.
This technology uses a pair of compression rollers set 1–10mm narrower than the battery thickness to induce cracks at the casing joints, followed by continuous underwater discharge and electrolyte recovery via a filtration line. Ideal for EV battery dismantling plants and collection hubs, it completes discharge in under 5 minutes, increasing throughput while minimizing water contamination from electrolyte leakage.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of advanced hydrometallurgical technologies to increase the value of recovered resources.
This technology prevents or delays thermal runaway by applying an external electric field to the battery's top and bottom electrode plates when fire signs are detected, suppressing internal charge collisions, and rapidly discharging electrolyte via gravity through a downward-facing safety venting device.
Lithium-ion battery fires are difficult to extinguish and prone to reignition due to internal short circuits and thermal runaway. Existing extinguishing agents struggle to penetrate cells, and submersion methods render batteries unusable after suppression.
This technology suppresses internal short circuits by applying an electric field to the electrode plates and uses a downward-facing safety vent to drain electrolyte by gravity during pre-thermal runaway stages. It also includes control logic to convert stored battery energy into power for the electric field, effectively depleting it. Applicable to ESS racks, EV modules, and marine battery rooms, it mitigates fire risks using the cell's own energy without extinguishing agents or submersion, minimizing equipment damage.
This invention was developed with support from the Ministry of Education for the development of lithium-ion battery fire suppression technology using electric fields.
This technology involves synthesizing an anode active material with an orthorhombic crystal structure by mixing lithium, magnesium, manganese, and vanadium sources in a specific molar ratio of 1:1-x:x:1 (0.5 ≤ x ≤ 0.8) and subjecting the mixture to heat treatment.
Conventional silicon anode materials suffer from significant volume expansion during charging and discharging, while lithium metal poses a risk of short circuits due to dendrite growth. Consequently, there has been a lack of new anode materials capable of reliably delivering high capacity and high power.
This technology achieves a LiMg1-xMnxVO4 (0.5 ≤ x ≤ 0.8) composition by precisely weighing and mixing the source materials, forming them into pellets with dimensions of 9–11 mm, and heat-treating them at 650–850℃ in an argon atmosphere to induce an orthorhombic crystal structure. This process ensures both electrochemical stability and high capacity. It can be applied to high-power lithium secondary batteries that must avoid the expansion issues of silicon anodes, as well as cells for power tools and small mobility devices that require reduced dendrite risks. Furthermore, it allows for the expansion of the anode material lineup through a simple solid-state reaction process.
This technology replaces the high-temperature welding methods traditionally used for electrical connection and stacking of battery electrodes with Anisotropic Conductive Film (ACF), utilizing a staggered arrangement and metal plate/particle support structures to achieve series or parallel connections.
Conventional high-temperature, high-voltage welding used in battery module assembly imposes thermal stress on batteries, reducing their lifespan and stability. Furthermore, it presents potential safety risks during the manufacturing process.
This technology eliminates the need for welding by placing an ACF containing conductive particles and particle supports at the battery electrode connection points. It ensures structural stability by using a staggered film structure between the first and second electrode layers, along with additional metal plates and insulating spacers to selectively form series or parallel connections. It can be applied to heat-sensitive pouch cell modules, stacked batteries for small wearable devices, and research or prototype battery packs that require frequent reassembly, allowing module assembly to be completed solely through film bonding without the need for welding equipment.
This technology optimizes the dispersion of fluorinated lithium salt and precisely controls its content by utilizing the mesoporous structure of zeolite, thereby increasing the ionic conductivity of the composite solid electrolyte and suppressing lithium dendrite growth.
Conventional solid polymer electrolytes suffer from low ionic conductivity at room temperature. Furthermore, when used with lithium metal anodes, the growth of lithium dendrites leads to internal short circuits and reduced safety.
This technology creates a composite solid electrolyte by blending polyalkylene oxide-based polymers and zeolite particles with 30–40 wt% of fluorinated lithium salt (such as LiTFSI), raising the work function to 3.5 eV or higher and achieving an elongation rate at least 1.5 times greater than that of a 10 wt% composition. It can be applied to lithium metal anode-based all-solid-state batteries, flexible wearable batteries, and free-standing film-type electrolyte membranes, improving adhesion to electrodes to lower interfacial contact resistance and reduce the risk of short circuits.
This technology is an electrode active material that incorporates transition metals (Mn or Cr) and hydration water (H2O) into a vanadium oxide (V2O5) framework, enabling the reversible intercalation and deintercalation of divalent calcium ions (Ca2+), which was difficult to achieve with conventional lithium-ion battery materials.
While existing cathode materials for lithium-ion batteries, such as V2O5, are effective for lithium ions, they face significant challenges when used in calcium-ion batteries, as the intercalation and deintercalation of calcium ions are hindered, leading to either a complete failure in charging/discharging or severely degraded performance.
This technology is configured to secure a reversible migration path for calcium ions by synthesizing an electrode composition with a new crystal structure in the form of AxV2O5·y(H2O) through the reaction of vanadium oxide with Mn or Cr-based transition metal salts in an acidic aqueous solution, such as nitric acid. It can be applied to calcium-ion battery cathodes, low-cost energy storage systems based on abundant elements, and research into active materials for multivalent ion batteries. Furthermore, since synthesis is possible through room-temperature aqueous reactions, it is easily scalable for mass production.
This technology synthesizes a novel Sr-V-O electrode material capable of reversible strontium ion intercalation by immersing a NaV3O8 (NVO) precursor in an aqueous strontium salt solution, utilizing osmotic pressure to replace sodium ions with strontium ions.
Conventional lithium and sodium secondary batteries face physical and chemical limitations related to resource scarcity and ion volume. While strontium secondary batteries have gained attention as next-generation energy storage, a suitable electrode material capable of reversible strontium ion intercalation had not yet been developed.
This technology involves coating a current collector with NaV3O8 powder and immersing it in an aqueous Sr salt solution, where osmotic pressure facilitates the exchange of Na ions for Sr ions to produce an electrode material with the composition Sr1+xV6O16·y(H2O) for use in strontium ion batteries. Its key advantage is a streamlined process that completes the electrode simply through immersion, without the need for high-temperature synthesis or applied voltage, making it applicable to strontium ion battery electrodes, aqueous multivalent ion battery prototypes, and low-cost, large-capacity storage devices.
This technology enhances the thermal stability of polyimide (PI) separators by coating their surfaces with lithium p-toluenesulfinate (PTSL) particles and a binder. The coating layer acts as an artificial Cathode Electrolyte Interphase (CEI) at the cathode interface, suppressing electrolyte side reactions.
Conventional polyethylene (PE) separators shrink at around 130°C, posing risks of internal short circuits and cell explosions at high temperatures. Furthermore, using high-energy-density cathodes, such as Ni-rich NCM, often leads to reduced cycle life due to side reactions with the electrolyte.
This technology involves applying PTSL with a polymer binder onto one or both sides of a porous support to form a coating layer. The sulfonate (SOx) functional group of PTSL functions as an artificial CEI layer that inhibits electrolyte decomposition, improves separator wettability and ion conductivity, and provides heat resistance exceeding 200°C. It can be applied to EV cells using high-nickel cathodes and power tool batteries prone to overheating during fast charging, solving both thermal safety and cathode interface protection challenges simply by replacing the separator.
