This technology utilizes a polymer network formed by polymerizing and cross-linking a vinyl-functionalized ionic liquid with N-vinylacetamide as a binder for lithium secondary batteries.
Conventional PVdF binders pose significant environmental and health risks and are costly. Furthermore, they suffer from electrode structural instability and low coulombic efficiency over repeated charge-discharge cycles.
This technology mixes an ionic liquid and N-vinylacetamide with an initiator, optionally combined with PVdF, to form a robust cross-linked network within the electrode, thereby enhancing adhesion, high-temperature thermal stability, and coulombic efficiency. It can be applied to electrode coating processes using NCM-based cathode slurries, supporting a transition toward reduced fluorine-based binder usage to lower production costs and improve workplace safety.
This technology precisely controls the 0–3D network structure and shell count of metal-organic frameworks (MOFs) by aminating transition metal nitride precursors before combining them with organic ligands, while adjusting the ratio of organic solvent to deionized water and the type of surfactant used.
Conventional MOFs suffer from low stability against heat, moisture, acids, and bases, as well as poor electrical conductivity, making long-term use difficult. In particular, they exhibit a sharp decline in performance under high current density conditions.
This technology implements an N-dimensional polymer network structure by aminating metal precursor sources, mixing them with organic ligands, and performing reduction treatment. It forms stable shell structures through dimension control based on solvent composition and step-by-step heat treatment temperature control. This allows for application in air-cathode catalysts for metal-air batteries and OER electrodes for water electrolysis, reducing reliance on precious metal catalysts while maintaining long-term bidirectional activity for oxygen reactions.
This invention was developed with support from the Ministry of Science and ICT for the development of a high-energy-density soft materials platform through the design of new organic superionic plastic crystal materials.
This technology manufactures dense, large-area, free-standing solid electrolyte sheets by placing a slurry containing a solid electrolyte and a binder between two release films to create a laminate, which is then compressed and dried.
Conventional methods struggle to control internal voids and face limitations in scaling up due to the constraints of high-temperature pressing processes. Additionally, increasing the binder content often leads to a reduction in ionic conductivity.
This technology forms a laminate by coating slurry between release films and compressing it at 0.1–1000 MPa to increase sheet density, while the release films block external moisture and facilitate easy peeling. As a result, it can be applied to roll-to-roll production of sulfide-based all-solid-state battery electrolyte membranes and large pouch-cell assembly, enabling the stable production of thin, wide electrolyte layers without the need for a support structure.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of manufacturing technology for solid electrolyte membranes with an ionic conductivity of 1 mS/cm or higher and a thickness of 30 μm or less.
This technology facilitates lithium-ion transport and controls the formation of the Solid Electrolyte Interphase (SEI) by depositing highly conductive metal particles on the surface of silicon nanowires at intervals of 10 nm to 1 µm.
When silicon nanowires are used as anode active materials, an SEI layer forms on the surface during high-speed charging and discharging. This has historically limited performance by reducing specific capacity and degrading cycle characteristics.
This technology involves selectively etching a silicon substrate using a metal catalyst to create nanowires, followed by applying conductive metal particles—such as Cu, Al, Zn, Fe, Pb, Ag, or Au—via drop coating or spray aerosol deposition. By spacing these particles, the process lowers electrode resistance and inhibits SEI layer formation. Suitable for high-rate discharge applications like drone and robot batteries or fast-charging smartphone cells, this method provides nanowires with optimized ion channels and electron pathways simply by adjusting particle spacing.
This technology involves activating the surface of carbon nanofibers (CNF) and using electrodeposition to uniformly grow metal oxides, such as Fe2O3 and ZnO, in the form of nanoneedles or nanopillars on both the exterior and interior of the fibers.
Conventional mixing and coating processes require binders and conductive additives, which reduce the mass efficiency of the active material. Furthermore, these methods often lead to the detachment of active materials during pulverization or a decrease in the conductivity of the carbon nanofibers. Alternative methods, such as hydrothermal synthesis, are limited by long processing times and complex procedures.
This technology eliminates the need for binders and conductive additives by using the carbon nanofibers themselves as the electrode. By precisely controlling the quantity, shape, and location of the metal oxides through electrodeposition conditions, the surface area is maximized via a needle or pillar structure. Applicable to lithium-ion battery anodes, supercapacitor electrodes, and electrochemical filters for water treatment, this single electrodeposition process enables the rapid production of high-strength fiber electrodes for both energy storage and filtration purposes.
This technology involves removing randomly attached metal deposits from the surface of silicon nanowires created via Metal-Assisted Chemical Etching (MACE), followed by re-immersion in a diluted strong acid solution to uniformly precipitate metal particles onto the surface.
When silicon nanowires are used as an anode active material, an unstable Solid Electrolyte Interphase (SEI) layer forms on the surface during high-speed charge and discharge cycles. This leads to a simultaneous decline in specific capacity and cycle life.
This technology removes electrodeposited metals after MACE using nitric acid or similar agents, then uses a diluted strong acid solution to uniformly re-precipitate metal particles, such as silver (Ag), onto the nanowire surface. This enhances electrical conductivity and controls the formation of the SEI layer. It can be applied to silicon anodes in electric vehicle batteries requiring fast charging and high-power power tool cells, effectively slowing the reduction of specific capacity even under high-current conditions.
This technology synthesizes a 3D network copolymer with excellent self-healing properties and mechanical strength by using a Diels-Alder reaction to polymerize a polyacrylic acid backbone modified with furfurylamine and bismaleimide side chains to mitigate the volume expansion of silicon anodes.
Silicon anodes have historically faced issues with particle pulverization due to significant volume expansion and contraction during charge and discharge cycles. This leads to loss of electrical contact, unstable SEI layers, and electrode delamination, resulting in a rapid decline in battery life and capacity.
This technology uses a copolymer binder formed by the Diels-Alder reaction between furfurylamine-modified polyacrylic acid (PFM) and a bismaleimide (BMI) cross-linker. It self-heals damage caused by volume changes and maintains strong adhesion between silicon particles and the current collector through strong hydrogen bonding and a 3D network. Applicable to high-capacity silicon-rich anodes and fast-charging mobile batteries, it maintains over 92% coulombic efficiency for 200 cycles and delays electrode delamination.
This technology introduces silyl ether compounds, such as methoxytrimethylsilane, as electrolyte additives. By removing fluoride ions (F-) generated from electrolyte decomposition through a nucleophilic substitution reaction, it suppresses metal dissolution from LMO cathodes and enhances interface stability.
In lithium secondary batteries, electrolyte decomposition during charge and discharge cycles generates fluoride ions (F-). These ions corrode and dissolve transition metals in manganese-based spinel (LMO) cathodes, leading to increased internal resistance and a significant reduction in cycle life.
This technology involves adding methoxytrimethylsilane (MTSi) at a concentration of 0.1 to 1.0 wt%, preferably 0.25 wt%, to the electrolyte. The Si-O functional group reacts with fluoride ions to convert them into fluorosilane and methanol. This suppresses cathode surface cracking and manganese deposition on graphite anodes. It can be applied to cells for electric two-wheelers and hybrid vehicles using low-cost LiMn2O4 cathodes, effectively addressing the inherent lifespan limitations of manganese-based materials with a single additive.
This technology is a process for converting amorphous precursor films formed by atomic layer deposition into a crystalline structure. By covering the film with a barrier sheet containing the same metal components during heat treatment, it prevents the leakage of metals like lithium and the delamination of the substrate.
During the high-temperature heat treatment of amorphous material films, metal components often leak out, leading to degraded battery performance or film delamination from the substrate. Additionally, the formation of natural byproduct layers composed of carbon and oxygen compounds during transfer from the chamber to the furnace has historically increased interface resistance.
This technology involves depositing an amorphous film via an ALD process using metal precursors, then heat-treating it at 600°C or higher while covered with a barrier sheet containing the corresponding metal (e.g., lithium). This prevents compositional changes and delamination while removing natural byproduct layers to facilitate conversion into a crystalline structure. It can be applied to the manufacturing of cathode thin films for thin-film batteries, micro-batteries, and all-solid-state batteries, enabling the production of stoichiometric crystalline thin films with reduced interface resistance.
This technology enhances crystallographic stability by modifying the surface crystal structure of a layered base cathode active material precursor into a second crystal structure with wider interlayer spacing, followed by cation exchange to replace a portion of the first metal with a second metal, thereby removing residual anions and moisture.
Cathode active material precursors produced via conventional co-precipitation often retain internal moisture or anions, leading to the formation of numerous voids during the final synthesis. These voids cause micro-cracks as particles expand and contract during charge-discharge cycles, ultimately limiting battery lifespan.
This technology converts the base precursor into a crystal structure with wider interlayer spacing and performs reflux heat treatment in a cation exchange solution containing a second metal, such as cobalt. This process removes residual internal anions and concentrates the second metal on the particle surface to form a core-shell structure. It can be applied to high-nickel NCM cathode mass production and long-life EV cell development, helping to reduce particle cracking and slow capacity degradation in later cycles.
This invention was developed with support from the Ministry of Science and ICT for research and development on electrode active materials for high-performance lithium secondary batteries through precision control at the nanoscale.
This technology utilizes a novel polyimide, in which two or more organic radical groups are bonded to a diamine component, as an electrode active material. It achieves thermal stability through intra-chain reactions within the polymer and enables the implementation of flexible, film-type electrodes.
Conventional inorganic-based electrodes suffer from low flexibility, making them prone to cracking when bent. Even when organic radical polymers are used, they face limitations such as low heat resistance and difficulty in achieving sufficient electrode capacity.
This technology utilizes a specific polyimide structure with organic radical groups bonded to a pyrrolidine ring and its precursor, soluble poly(amic acid). By creating ultra-thin film electrodes through a solution process followed by thermal imidization, it simultaneously achieves heat resistance and high-density redox reactions. It can be applied to thin-film power sources for flexible displays, smart cards, and skin-attachable sensors, offering the potential to manufacture metal-free, bend-resistant organic electrodes via printing processes.
This technology is a coating composition in which an acrylic rubber compound—consisting of alumina ceramic particles, a rubber binder, a water-soluble dispersant, and a water-soluble wetting agent—is dispersed in a water-based solvent. It ensures the thermal stability of the coating layer and enhances adhesion to the substrate.
Conventional ceramic coating solutions are based on organic solvents, posing significant risks of environmental pollution and worker exposure. They also suffer from poor adhesion between the separator substrate and the ceramic layer, as well as issues with thermal shrinkage and potential meltdown of the separator at high temperatures.
This technology utilizes a water-based coating solution containing an emulsion-polymerized acrylic copolymer rubber binder, a silicone-based acrylate dispersant, an ester-based acrylate wetting agent, and a carboxymethyl cellulose sodium salt viscosity modifier to control the thermal shrinkage of the coating layer to within 0–1%. It can be applied to ceramic coating lines for polyolefin porous separators and the manufacturing of high-safety cells for EVs and ESS, allowing for the production of separators with reduced high-temperature short-circuit risks while eliminating the burden of organic solvent exhaust and recovery systems.
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.
