This technology produces structurally stable layered lithium-transition metal oxides by coating Prussian Blue Analog (PBA) particles with lithium salt and a transition metal precursor, followed by thermal decomposition in an air atmosphere to replace CN bridges within the PBA with oxygen bridges.
Conventional lithium-transition metal oxides suffer from poor high-rate, or high-power, performance. Furthermore, manufacturing processes often lead to structural instability caused by crystal defects or cation mixing.
This technology minimizes crystal defects by aging PBA particles for 3–5 weeks, prevents structural collapse during calcination by coating LiOH and transition metal precursors onto particle surfaces and pores, and forms a hexagonal layered structure with a c/a ratio of 1.4–1.5 through two-stage calcination at 800–900°C and 750–850°C. Suitable for hybrid vehicle cells requiring high instantaneous power or high-discharge industrial batteries, its uniform cubic particles also simplify electrode packing design.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of manufacturing processes for cathode/anode materials and electrodes to achieve high-rate characteristics in lithium secondary batteries for frequency regulation.
This technology optimizes sulfur utilization, electrical conductivity, and ion transport pathways in metal-sulfur battery cathodes by physically segregating sulfur-rich regions from carbon-rich regions, such as graphene.
Conventional lithium-sulfur batteries suffer from low electrical conductivity, poor sulfur utilization, polysulfide dissolution into the electrolyte, and limited low-temperature performance. Furthermore, traditional slurry casting processes require binders, which reduce specific capacity and complicate manufacturing.
This technology creates a binder-free, freestanding cathode film by mechanically mixing graphene with sulfur-containing materials like S8 or Li2S, then compressing them at 750–1100 MPa. During compression, Li2S undergoes a phase transition from cubic to orthorhombic, while the addition of ammonium nitrate (NH4NO3) to the electrolyte improves low-temperature performance and sulfur efficiency. Ideal for drones, urban air mobility, and cold-climate portable power, this binder-free approach increases energy density by reducing weight.
This technology involves dry-mixing high-nickel cathode active material precursor particles (with a nickel content of 60 mol% or higher) with a fluorine source, such as NH4F or NH4HF2, followed by heat treatment at 300°C or above. This process forms a LiF film or particles on the surface and induces a concentration gradient where the fluorine content gradually decreases toward the interior.
Lithium by-products, such as LiOH and Li2CO3, remaining on the surface of high-nickel cathode active materials have historically reacted with electrolytes, degrading battery performance. These issues, including thermal instability and metal leaching into the electrolyte, become particularly severe as the nickel content increases.
This technology utilizes a dry coating process with a fluorine source, followed by heat treatment at a specific temperature range of 300°C or higher—where the particle's crystal structure remains stable—to allow residual lithium to react with fluorine and form LiF compounds. This process reduces surface residual lithium and introduces fluorine into the particle interior, effectively suppressing HF generation and metal leaching. It is applicable to long-range electric vehicle batteries using high-nickel NCM chemistries and energy storage cells exposed to high-temperature environments, offering the process advantage of managing surface residual lithium through a solvent-free dry process.
This technology combines the high theoretical capacity of silicon with the superior rate capability and structural stability of lithium titanium oxide (LTO) into a single porous spherical composite. Specifically, the integration of 1D nano-structured LTO enhances both electrical and lithium-ion conductivity within the composite.
Conventional graphite anodes have clear limitations in theoretical capacity, while high-capacity silicon materials suffer from particle degradation due to volume expansion during charge/discharge cycles, leading to reduced lifespan. Furthermore, they have struggled to meet the high-speed charging performance required for the commercialization of electric vehicles.
This technology consists of porous spherical particles produced by spray-drying a mixture of LTO (in nanowire, nanorod, or nanofiber form), silicon-containing materials, and crystalline carbon. It is designed so that the crystalline carbon buffers silicon expansion, while the 1D LTO provides pathways for high-speed charging. Amorphous carbon coating can be added to further enhance electrical conductivity and mechanical strength. Applicable as an anode material for EVs requiring rapid charging or as a high-capacity blending material to replace graphite, it helps reduce charging wait times while maintaining cell energy density.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of manufacturing processes for cathode/anode materials and electrodes to achieve high-rate characteristics in lithium secondary batteries for frequency regulation.
This technology improves battery performance by uniformly mixing and doping transition metal dopants, such as Ti and Zr, into nickel-cobalt-manganese-based cathode active materials for sodium-ion batteries, thereby strengthening crystal structure stability and suppressing structural collapse in high-voltage ranges.
Conventional cathode active materials for sodium-ion batteries are prone to phase transitions or structural collapse during charge and discharge cycles, which has limited their capacity and cycle life.
This technology utilizes a ball-milling process to evenly distribute dopant precursors, such as TiO2 and ZrO2, throughout the interior and surface of transition metal oxide precursor particles. Subsequent heat treatment yields a secondary particle-type cathode active material with improved particle strength and tap density. Applicable to sodium batteries for large-scale energy storage systems or low-cost electric two-wheelers that require reduced reliance on lithium, this technology expands the usable high-voltage charging range and increases energy storage per cell.
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 uses a conductive potential barrier (such as graphene foam) to separate the electrolyte into an external electrolyte and an internal electrolyte in contact with the nanostructured anode active material. During charging, it induces the formation of a potential difference and an SEI layer only at the external electrolyte interface, thereby suppressing side reactions on the active material surface.
High-capacity anode materials like silicon undergo significant volume changes during charge and discharge cycles, causing the Solid-Electrolyte Interphase (SEI) layer at the electrode interface to repeatedly break and reform. This leads to gradual capacity degradation and shortened cycle life.
This technology utilizes a 3D micro-tubular graphene foam as a potential barrier to physically and electrically isolate the internal electrolyte, preventing SEI layer formation on the surface of nanowire active materials, such as nickel silicide, grown within the internal space. Applicable to EV batteries using silicon-based high-capacity anodes or power tool batteries requiring high-rate charge/discharge, it keeps the active material surface pristine through repeated charging, favoring long-term capacity retention.
This invention was developed with support from the Ministry of Science, ICT and Future Planning for the development of 3D nano-architecture hybrid materials and devices for human interfaces, as well as the development of manufacturing processes for high-performance cathode/anode materials and electrodes.
This technology enables the selective heterogeneous nucleation and growth of transition metal oxide nanoparticles from transition metal salts in solution onto carbon nanotube (CNT) surfaces using microwave irradiation, eliminating the need for acid treatment. It leverages the principle that free electrons in CNTs absorb microwave energy to induce localized high-temperature heating, allowing for uniform nanoparticle deposition.
Conventional manufacturing of transition metal oxide/CNT composites requires acid treatment of the CNT surface, which increases processing time and costs while damaging the CNT structure. Furthermore, the spinel-structured Li4Ti5O12 is difficult to synthesize at the nanoscale and has low conductivity, limiting its high-rate charge/discharge performance and capacity.
This technology uses a microwave synthesis device to heat materials at 2.45–60 GHz for 10–30 minutes, uniformly forming 2–30 nm Fe3O4, TiO2, or Li4Ti5O12 nanoparticles on CNT surfaces without acid treatment. Li4Ti5O12 is heat-treated at 500–900°C in a hydrogen-argon atmosphere to stabilize its spinel structure. Applicable to high-power hybrid vehicle batteries, fast-charging LTO anodes, and lithium-ion capacitor electrodes, this rapid, minutes-long synthesis process significantly reduces mass production costs.
This technology induces chemical covalent bonds, such as Si-O-C and Si-O-Si, between a polymer substrate and an inorganic thin-film layer by exposing the surface to 1–100 kGy of radiation. This process significantly improves interfacial adhesion.
Conventional polymer composite separators suffer from poor stability due to thermal shrinkage at high temperatures. Furthermore, weak bonding between the polymer substrate and the inorganic layer often leads to delamination, which can cause internal short circuits and battery explosions.
This technology involves treating a porous polymer substrate with oxygen plasma to impart hydrophilicity, depositing an inorganic thin film (e.g., SiO2, Al2O3), and then applying 1–100 kGy of radiation (e.g., electron beam) to strengthen the chemical bonds at the interface. Applicable to heat-resistant lithium-ion battery separators, high-safety EV cells, and water treatment membranes, it prevents inorganic layer delamination without adhesive binders, reducing the risk of internal short circuits.
This invention was developed with support from the Ministry of Science, ICT and Future Planning for the development of organic environmental pollutant-reducing photoelectrochemical hydrogen production.
This technology involves forming a coating layer on the surface or within a porous substrate that contains a PVdF-HFP copolymer and graphene oxide bonded with lithium ions. This enhances both ion mobility and thermal/mechanical stability.
Conventional polyolefin separators suffer from thermal shrinkage at high temperatures and insufficient mechanical strength. Furthermore, simple graphene oxide coating methods have limitations in terms of weak adhesion to the substrate and restricted improvements in ion permeability.
This technology creates a coating layer by dispersing graphene oxide, which is cation-pi bonded with lithium ions, within a PVdF-HFP copolymer matrix. It increases lithium-ion mobility in the electrolyte through repulsion and electrical affinity, while also controlling nano/micro-pore structures. Applicable to electrochemical devices like high-output EV batteries, fast-charging pouch cells, and supercapacitors, it boosts high-rate charge/discharge performance and high-temperature dimensional stability with only a small amount of graphene oxide.
This invention was developed with support from the Ministry of Science, ICT and Future Planning for the development of organic environmental pollutant-reducing photoelectrochemical hydrogen production.
This technology produces porous silicon by first dissolving the metal component of a silicon-metal alloy compound in an acidic solution to create micro-pores, followed by a secondary etching process with a basic solution to expand the internal pores of the silicon particles.
Conventional methods for manufacturing porous silicon require the use of hydrofluoric acid (HF), which is hazardous to human health. These methods also necessitate expensive precious metal catalysts or costly processing equipment and struggle to control pore size, limiting their ability to suppress anode volume expansion and improve battery lifespan.
This technology utilizes a two-step etching process: first, removing metal from the alloy with a 0.1–0.4M acidic solution to create micro-pores, and second, further etching the silicon around these pores with a 0.05–0.3M basic solution before neutralizing with acid. The resulting internal pores absorb silicon expansion during lithiation, extending electrode life. Applicable to mass production of silicon anode materials, chemical plants with strict safety regulations, and long-life lithium-ion battery anodes, this method allows for pore structure control using only common chemicals like HCl and NaOH.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of high-energy-density lithium-ion secondary batteries for electric vehicles.
This technology improves all-solid-state battery performance by incorporating a mixture of sulfide-based glass-ceramics and sulfide-based crystals with different Young's moduli into the cathode or anode composite electrode, thereby reducing inter-particle voids and maximizing the contact area between active materials and the solid electrolyte.
All-solid-state batteries have historically faced high contact resistance due to voids within the electrode and at its interfaces. Furthermore, the repeated expansion and contraction of active materials during charge and discharge cycles lead to inter-particle cracking and reduced contact area, which degrades electrochemical performance.
This technology utilizes a solid electrolyte composed of a 25:75 weight ratio of soft sulfide-based glass-ceramics (14–20 E/GPa Young's modulus) and argyrodite-type sulfide-based crystals (22–30 E/GPa Young's modulus) within the composite electrode. The pliable glass-ceramics fill the gaps between crystalline particles, reducing internal porosity and maintaining interfacial contact during cycling. Suitable for thick-film cathodes and automotive modules operating under low stack pressure, this approach reduces reliance on high-pressure cell clamping equipment.
This invention was developed with support from the Defense Acquisition Program Administration's project for core technology development of high-safety, extreme-environment all-solid-state batteries.
This technology utilizes inexpensive water glass (alkali silicate) as a raw material, replacing metal ions with hydrogen ions via ion-exchange resin. Through spray drying and a reduction process involving a scavenger (NaCl), it produces SiOx anode active materials with controlled volume expansion.
Silicon-based anodes suffer from rapid degradation due to significant volume changes exceeding 400% during charge and discharge cycles. SiOx-based anode active materials have also been limited by high manufacturing costs and low initial efficiency.
This technology involves exchanging alkali metal ions in water glass with hydrogen ions, creating spherical powders via spray drying, and reacting the dried product with a reducing agent (Mg) and a scavenger (NaCl) in a weight ratio of 1:0.7–1.3:0.5–1.5 to suppress impurities like Mg2SiO4. A carbon coating layer can be added using a dopamine precursor if needed. Applicable as a SiOx additive for graphite anodes or as a high-capacity anode material for entry-level EVs and small electronics, it offers a way to replace expensive SiO deposition processes with sodium silicate, a common chemical raw material.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of manufacturing processes for cathode/anode materials and electrodes to achieve high-rate characteristics in lithium secondary batteries for frequency regulation.
This technology enhances electrical conductivity and dispersibility in cathode slurries by mixing spherical primary conductive materials, such as carbon black, with linear secondary conductive materials, specifically graphene nanoribbons, in a precise ratio to form a 3D network where nanoribbons are positioned between spherical particles.
Using only a single conductive material like carbon black often fails to create effective conductive pathways within thick electrodes. This limitation frequently leads to poor electron transport, resulting in reduced capacity and power performance, especially under high-rate charge/discharge conditions.
This technology involves opening carbon nanotubes longitudinally to create graphene nanoribbons with hydroxyl (-OH) and carboxyl (-COOH) groups on their surfaces. These are mixed with spherical conductive materials in a weight ratio of 95:5 to 85:15 to ensure dispersibility in polar solvents. Applicable to thick-film high-loading cathodes, high-power hybrid vehicle cells, and fast-charging electrode slurry formulations, it builds a point-to-line electronic pathway with only a small addition of nanoribbons.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of manufacturing processes for cathode/anode materials and electrodes to achieve high-rate characteristics in lithium secondary batteries for frequency regulation.
This technology secures structural stability in high-nickel cathode active materials by doping tungsten (W) at the surface terminals of primary particles to pre-form a spinel structure that coexists with the layered structure.
High-nickel cathode active materials have historically suffered from structural instability during charge-discharge cycles, leading to the formation of irregular spinel structures on the surface. This process causes micro-cracks, which limit cycle life and thermal stability.
This technology forms a 5–50nm thick spinel region at the terminals of primary particles on the secondary particle surface before the initial charge. W-doping increases the lattice parameter 'a' to facilitate lithium-ion diffusion, while the pre-established spinel structure prevents disordered phase transitions during cycling. Applicable to ultra-high-nickel cathodes (Ni 90mol%+) and long-life cells for medium-to-large battery packs, it serves as a foundation for cathode design targeting over 80% capacity retention after 500 cycles.
This technology is a solution-based process that inserts and dopes lithium (or metal) into silicon nanoparticles by mixing them into an amine-based solution in which lithium or metal is dissolved under room temperature and atmospheric pressure conditions.
Conventional silicon-based anode active materials suffer from high initial irreversible capacity due to lithium consumption during the first charge/discharge cycle. Additionally, they face limitations in cycle life as the SEI layer is destroyed by volume expansion and contraction during charging and discharging.
This technology involves dissolving lithium metal or lithium compounds in an amine-based solvent, reacting it with silicon nanoparticles containing a mixture of Si and SiO2, and obtaining pre-lithiated silicon nanoparticles through a two-stage separation process of filtering and residual solvent evaporation. It can be applied to silicon-graphite composite anodes, high-energy EV cells, and pre-lithiation process lines, allowing for full utilization of cathode capacity by compensating for initial efficiency losses without the need for high-temperature or high-pressure equipment.
This invention was developed with support from the Ministry of Science, ICT and Future Planning for the development of organic environmental pollutant-reducing photoelectrochemical hydrogen production.
