This technology is an electrode manufacturing process that creates a textured surface by mechanically grinding a metal current collector, then directly rubbing it with a pencil lead containing a mixture of graphite and silica-based clay to bond a graphene layer without the use of a binder.
Conventional processes using binders increase internal electrode resistance and reduce active surface area. Furthermore, they face limitations where the binder dissolves during charge/discharge cycles due to swelling, causing the active material to detach and leading to a decline in battery capacity and stability.
This technology involves grinding metal foil using equipment such as a ball mill to create a surface with an average roughness of 2–14㎛. By rubbing a pencil lead over this surface, a physically bonded multi-layer graphene structure is formed, achieving high electrical conductivity and a uniform SEI layer without the need for a binder. It can be applied to educational battery kits, low-cost small secondary batteries, and flexible electrode prototyping, allowing for the rapid production of anodes using simple tools without the need for slurry mixing or drying equipment.
This technology is a doping process that selectively diffuses only boron elements into silicon oxide by placing a dummy substrate coated with a boron compound dopant at a physical distance from silicon oxide powder and performing heat treatment, thereby leaving no boron compound impurities behind.
Silicon oxide-based active materials have historically suffered from low electrical conductivity and poor long-term cycle life. Conventional methods of directly mixing dopants with active materials often leave residual boron compound impurities, which limit the specific capacity of the active material.
By placing a substrate coated with a boron compound, such as borosilicate, at a distance from the silicon oxide powder and heat-treating them at 800–1000°C, this technology enables uniform doping of only boron elements via vapor-phase diffusion, while also inducing silicon crystallization. It can be applied to mass production lines for silicon-based anode materials for electric vehicles and high-capacity IT devices, allowing for the production of anode materials with improved ion diffusion rates and cycle characteristics without the need for a post-doping cleaning process.
This technology forms a self-assembled monolayer (SAM) on the surface of nickel-rich layered oxide cathode active materials via vapor deposition of organic silane compounds, preventing electrolyte penetration into the particles and improving interfacial stability.
Nickel-rich cathode active materials have historically suffered from electrolyte penetration during high-voltage charging, leading to side reactions. This results in gas generation, micro-cracking, and electrode polarization, which limit battery capacity and lifespan.
This technology applies organic silane compounds, such as octyltrichlorosilane (OTS), via vapor deposition to create a 0.1–10 nm thick self-assembled monolayer. The hydrophobic film, anchored by Si-O-Ni covalent bonds, prevents direct contact between the electrolyte and the active material, thereby suppressing particle degradation and micro-cracking. Suitable for long-range EV cells and high-energy drone batteries requiring high-voltage charging, this nanometer-thin film effectively manages both gas expansion and particle cracking.
This technology involves adding trimethoxymethylsilane (TMSi), a silyl ether-based additive, to the electrolyte to form a robust solid electrolyte interphase (SEI) layer containing Si-O-Si, Si-O, and Si-C functional groups on the graphite anode surface during charge/discharge, thereby suppressing continuous electrolyte decomposition.
Conventional batteries using carbonate-based electrolytes and graphite anodes suffer from unstable SEI layers caused by continuous electrolyte decomposition during charge/discharge cycles. This leads to limitations in cycle life and capacity retention.
This technology adds 0.25 wt% to less than 1.0 wt% of TMSi relative to the total electrolyte weight and uses an EC:EMC volume ratio of 1:2 to form a Si-based SEI layer on the graphite anode via electrochemical reduction. It can be applied to power cells for power tools and e-bikes using LMO spinel cathodes and graphite anodes, helping to suppress electrolyte consumption and improve capacity retention over long-term cycling.
This technology produces a TiNbO4 precursor via an ethylene glycol-based secondary alcohol sol-gel method and performs heat treatment in a nitrogen atmosphere. By creating an anode active material with nano-sized particles, internal pores, and carbon atoms distributed on the surface and interior, it reduces lithium-ion diffusion distances and enhances electrical conductivity.
Conventional transition metal oxide anode materials suffer from low lithium-ion conductivity and structural instability during charge-discharge cycles. Their slow electron transfer rates also limit performance during high-speed charging and discharging.
This technology mixes titanium butoxide and niobium ethoxide in a secondary alcohol to control particle size at the nanoscale. A precursor is obtained through a sol-gel reaction using acetone and distilled water as hydrolysis catalysts, followed by heat treatment at temperatures exceeding 550°C in a nitrogen environment to secure a tetragonal rutile crystal structure, residual carbon, and controlled porosity. Applicable to anodes for fast-charging electric buses, equipment for low-temperature environments, and high-output hybrid vehicles, the pore size and carbon content can be custom-designed simply by adjusting the heat treatment temperature.
This invention was developed with support from the Ministry of Education's Nanosensor Research Institute.
This technology involves a primary heat treatment of transition metal hydroxides in an ammonia atmosphere to create nanostructured metal nitride intermediates. These are then mixed with a lithium source and subjected to a secondary heat treatment, which promotes single-crystal formation of grains within the primary particles and reduces internal strain to 0.088, thereby enhancing electrical conductivity and charge-discharge efficiency.
Conventional cathode active materials, such as LiCoO2, have faced issues with structural instability during manufacturing and shortened lifespans due to repeated charge-discharge cycles. In particular, they were limited by non-uniform grains within primary particles and residual strain, which hindered electrical conductivity.
This technology synthesizes nanostructured metal nitride intermediates with a specific surface area more than nine times larger by heat-treating transition metal hydroxide precursors in a 400°C ammonia atmosphere. These are then mixed with a lithium source and calcined in an oxygen atmosphere to produce primary particles with a high single-crystal ratio. Applicable to high-voltage lithium cobalt oxide-based mobile device batteries and mass production processes for nickel-manganese layered cathodes, this method improves particle crystallinity simply by modifying the heat treatment path, without the need for additional doping.
This invention was developed with support from the Ministry of Science and ICT for research on the correlation between the physical properties of atomic-level controlled metal nanoclusters and their photoelectrochemical behavior.
This technology improves electrochemical performance by substituting chromium (Cr) and vanadium (V) into the lithium-manganese oxide (Li2MnO3) structure at specific molar ratios to ensure lattice stability, and by manufacturing precursors through a co-precipitation method.
Conventional layered lithium-manganese oxides suffer from structural instability, leading to degraded cycle performance. Spinel structures also face limitations in capacity compared to lithium-cobalt-based materials.
This technology targets a composition of Li2[Mn1-(x+y)CrxVy]O3 (0<x<0.25, 0<y<0.25). It involves adjusting a chromium-vanadium metal salt solution from pH 9–13 to pH 2–6, mixing it with a manganese salt, and using a reducing agent to co-precipitate the precursor, followed by a two-stage calcination process for crystallization. Suitable for material companies developing high-capacity lithium-rich cathodes or cobalt-free EV batteries, the dual-element substitution stabilizes the lattice, providing a design basis for mitigating the cycle degradation typical of manganese-based materials.
This technology produces high-capacity, high-crystallinity lithium-manganese composite oxides by synthesizing amorphous manganese-transition metal (V or Nb) composite precipitates via a reduction-precipitation method, followed by mixing with lithium compounds and calcining at low temperatures.
Conventional manganese-based cathode active materials, such as LiMnO2, suffer from low structural stability, leading to structural collapse and reduced capacity and efficiency during repeated charge-discharge cycles. Furthermore, they are limited by the formation of impurities during high-temperature calcination.
This technology uses a reducing agent, such as NaBH4, to co-precipitate manganese and a dissimilar metal (V or Nb) into an amorphous phase. This is then mixed with a lithium compound and subjected to a two-stage heat treatment at a relatively low temperature of 300–800°C to obtain a single-phase oxide with the composition Li1+a(Mn1-bMb)1-aO2. It can be applied to mass-production lines for cathode materials where calcination energy costs must be reduced, or to low-cost manganese-based cells for energy storage. Thanks to the atomic-level mixing of the precursor, it is possible to obtain crystals with uniformly distributed dissimilar metals even at low temperatures.
This technology involves coating the surface of a lithium-ion battery cathode active material with an aluminum-doped zinc oxide (AZO) thin film, represented as Al(2/3)xZnxO (x=0.05~0.2), at a thickness of 1–10 nm. This prevents the formation of irreversible lithium secondary phases during charge/discharge cycles and ensures long-term stability.
Conventional oxide-based cathode protective layers often suffer from low electrical conductivity, which can degrade the electrical performance of the cathode. Furthermore, the limited range of materials compatible with atomic layer deposition (ALD) processes has historically made it difficult to achieve optimal cathode performance.
This technology utilizes Al(2/3)xZnxO—zinc oxide doped with aluminum—as a protective layer material. By forming a uniform 1–10 nm thin film via ALD, CVD, or sputtering, it allows for precise control over the physical and electrical properties of the cathode surface. It can be applied to the surface treatment of various commercial cathode materials, including NCM, LCO, LMO, and LFP, serving as a coating solution that minimizes initial capacity loss while significantly improving long-term cycle capacity retention.
This technology utilizes a non-aqueous electrolyte combining lithium salts (LiFSI/LiTFSI) with glyme-based solvents, such as monoglyme or diglyme, in electrochemical thermocells. This approach achieves a higher Seebeck coefficient than aqueous electrolytes and expands the operating temperature range.
Conventional aqueous electrolyte-based thermocells have been limited by low Seebeck coefficients, a narrow operating temperature range of 0–100°C, and relatively high thermal conductivity, which reduces energy conversion efficiency.
This technology uses LiFSI or LiTFSI at a concentration of 0.5–2 M, combined with ethylene glycol dimethyl ether (monoglyme) or diethylene glycol dimethyl ether (diglyme) as a single solvent. This configuration achieves a Seebeck coefficient of 2–3.0 mV/K and an operating range of -50 to 150°C. It can be applied to industrial waste heat recovery, self-powered sensors for polar or space exploration, and wearable body-heat energy harvesters, allowing waste heat to be converted into electricity in environments ranging from sub-zero temperatures to high-heat industrial processes using a single electrolyte.
This technology is a surface modification method that enhances conductivity and suppresses side reactions with the electrolyte by coating the surface of lithium titanium oxide (LTO) anode particles with 1–6 nm nitrogen-doped graphene quantum dots (N-GQDs).
Conventional LTO anode materials have limited high-rate charge/discharge performance due to low intrinsic electronic conductivity and lithium-ion diffusion coefficients. Furthermore, they suffer from swelling issues caused by gas generation resulting from electrolyte decomposition during charge, discharge, and storage.
This technology forms a 1–6 nm thick nitrogen-doped graphene quantum dot coating layer on LTO particles smaller than 1 μm. This structure prevents excessive SEI layer growth, improves the lithium-ion diffusion coefficient, and minimizes reductive decomposition of the electrolyte. It can be applied to ESS for power grid frequency regulation, hybrid buses, and fast-charging industrial batteries that require tens of thousands of cycles, thereby reducing the chronic swelling defects of LTO cells and increasing long-term operational reliability.
This technology enables the manufacturing of electrolyte sheets via slurry casting without high-temperature sintering. By mixing a polymer binder with polar functional groups (PVdF) and an ionic liquid (BMIM-TFSI) in an optimal ratio, it secures ion conduction paths between oxide-based solid electrolyte particles and enhances interfacial adhesion.
Conventional pellet-type solid electrolytes suffer from low mechanical stability, making large-area processing difficult and necessitating high-temperature sintering. Even when converted into sheet form, polymer binders have historically reduced ionic conductivity and increased interfacial resistance with electrodes.
This technology involves mixing an oxide-based solid electrolyte (Li1+x+yAlxTi2-xSiyP3-yO12), an ionic liquid (BMIM-TFSI), and a PVdF binder in a weight ratio of 7:1.5:1.5 to 8:1:1 to form a 60–70㎛ thick sheet. This achieves an ionic conductivity of 1×10^-4 to 2×10^-4 S/cm and a peel strength of 0.4–0.5 N. Suitable for roll-to-roll mass production of all-solid-state batteries and next-gen cells using lithium metal anodes, it provides thin, easy-to-handle electrolyte membranes without sintering furnace equipment.
This technology forms a gel-type polymer electrolyte network by adding 2-(trimethylsilyloxy)ethyl methacrylate (TSEMA) monomer and an AIBN initiator to a lithium secondary battery electrolyte, then inducing in-situ polymerization within the electrode through 45°C aging after cell assembly.
Conventional liquid electrolytes suffer from poor thermal stability and leakage risks. Solid or polymer electrolytes intended to replace them have faced limitations in performance due to low ionic conductivity and poor electrode interface characteristics.
This technology involves mixing a pre-polymer electrolyte (PPE) consisting of a carbonate-based electrolyte, TSEMA monomer, and AIBN initiator, allowing it to diffuse evenly into the cell, and then performing thermal aging at 45°C to create a gel-like ion-conductive network that penetrates deep into the porous electrodes. It can be applied to pouch-type cells using existing liquid electrolyte injection lines or to wearable power sources where leakage prevention is critical, providing a pathway to transition to semi-solid batteries without the burden of equipment changes.
This technology is a composition for separator coating that includes a core-shell structured acrylate copolymer emulsion, where the core consists of an alkyl-group-containing (meth)acrylate and the shell consists of a fluorine-containing (meth)acrylate, designed to suppress moisture adsorption by the separator during aqueous processing.
Conventional aqueous inorganic-coated separators have high moisture affinity, which increases the moisture content inside lithium secondary batteries and degrades battery performance. They also face limitations in heat resistance and adhesion to porous substrates.
This technology introduces fluorine functional groups into the shell of the core-shell copolymer to provide water repellency. By using this in an aqueous coating composition with inorganic fillers, it reduces the moisture affinity of the separator surface while enhancing heat resistance and substrate adhesion. It can be applied to ceramic-coated separators produced via eco-friendly aqueous processes and to high-nickel cell manufacturing, where moisture control is critical, allowing for separators with reduced residual moisture without the use of organic solvents.
This invention was developed with support from the Ministry of Science and ICT for the development of self-reliance and challenging technologies in ICT materials, parts, and equipment.
This technology maximizes the metal capture surface area by coating the surface of acicular inorganic particles within the separator's porous coating layer with amine-based chelating functional groups that coordinate with metal ions, effectively trapping transition metal cations leaching from the cathode.
During high-voltage and high-temperature charging and discharging, transition metal ions such as nickel, manganese, and cobalt leach from the cathode active material and migrate to the anode, where they precipitate. This causes electrode assembly degradation and increased side reactions, limiting battery lifespan.
This technology forms a first coating layer containing chelating functional groups on the surface of acicular inorganic particles like halloysite or alumina. This is then applied with a polymer binder onto one side of a porous substrate, positioning the metal-adsorbing porous coating layer to face the cathode. It can be applied to EV cells using high-nickel, high-voltage cathodes and ESS cells operating in high-temperature environments, extending long-term cycle life by filtering out leached ions before they reach the anode.
This invention was developed with support from the Ministry of Science and ICT for target-specific functional dual-sided separator-based lithium metal batteries.
