This technology improves electrode structural stability and enhances electrochemical performance and cycle life in high-voltage environments by forming a fluoride coating layer (AlaNibFc) with a specific composition containing aluminum (Al) and nickel (Ni) on the surface of lithium secondary battery composite oxide cathode active materials.
While lithium-cobalt, nickel, and manganese-based cathode active materials allow for high capacity, they suffer from structural instability at high voltages. They also face limitations such as capacity degradation and shortened cycle life due to side reactions with the electrolyte.
This technology involves coating composite oxide particles with 0.1–10 wt% of an AlaNibFc fluoride that satisfies 0.15≤a≤1.05, 0.05≤b≤0.35, 2≤a/b≤4, and c=3(a+b). The process consists of dispersing the active material in an aqueous solution of Al and Ni compounds, adding an aqueous fluorine compound solution, stirring at 70–100°C, and heat-treating at 400–600°C. Applicable to cathodes for flagship mobile devices and high-energy electric vehicle cells that utilize 4.5V-class high-voltage charging, it provides design headroom that prevents surface degradation from accumulating even when the upper charging voltage limit is increased.
This technology involves synthesizing fine, spherical Li-V-O based metal oxide anode active materials with an orthorhombic crystal structure through the spray pyrolysis of a precursor solution containing lithium and vanadium compounds.
Conventional graphite-based anode materials suffer from low density, which reduces energy density per unit volume and causes side reactions with organic electrolytes. Metal oxides produced via standard wet synthesis methods also have limitations in improving charge-discharge capacity and cycle performance due to large particle size and low uniformity.
This technology involves spraying a composition with a Li/V molar ratio of 3.0 or higher using an ultrasonic nebulizer, pyrolyzing it in a high-temperature chamber at 600–900°C for 18–24 hours, and performing additional heat treatment at 300–600°C to obtain orthorhombic spherical particles with an average diameter of 0.1–5㎛. It can be applied as an anode material for small cells in smartphones and laptops, where volume constraints are significant, or for automotive modules that prioritize volumetric energy density. It is advantageous for mass-producing uniform powder through a continuous process, serving as a viable alternative to graphite.
This technology utilizes a Prussian Blue Analogue (PBA) with the chemical formula KxNi[Fe(CN)6]1-y·z(H2O) as an active material for calcium-ion batteries, enabling reversible intercalation and deintercalation of calcium ions.
Existing electrode materials for calcium-ion batteries often suffer from high polarization, leading to low energy efficiency or requiring high-temperature operation. Furthermore, there have been technical limitations in achieving reversible ion insertion and extraction reactions in non-aqueous electrolytes.
This technology uses an active material synthesized through a precipitation reaction between a nickel ion solution and K4[Fe(CN)6], with the crystal structure optimized by adjusting the potassium content (x=0.4 to 1) via electrochemical methods. As a result, calcium ions behave reversibly with low polarization of less than 1V even in room-temperature non-aqueous electrolytes. This allows for application in room-temperature calcium batteries and large-scale renewable energy storage systems, reducing the operational burden associated with high-temperature maintenance equipment.
This technology involves forming an anode active material layer containing photosensitive materials such as TiO2, WO3, or PANI on a transparent conductive substrate. When exposed to light, the photoelectric effect increases conductivity and electron density, facilitating the intercalation of lithium ions and thereby enhancing battery capacity.
Conventional graphite-based anode active materials are limited by a theoretical capacity of approximately 372 mAh/g. While alloy-based anodes using Si or Sn have been explored to overcome this, they suffer from structural degradation and poor cycle performance due to volume expansion.
This technology utilizes a composition consisting of 80–90 wt% photosensitive material, 3–5 wt% conductive agent, and 5–15 wt% binder, applied to a transparent conductive substrate. The photo-charges generated by light energy assist in lithium-ion transport and increase charge-discharge capacity. It can be applied to self-charging power sources integrated with solar energy, transparent display-integrated batteries, and lithium-ion capacitors, enabling a new design approach that leverages external light as auxiliary energy to improve battery performance.
This technology utilizes a nickel-iron-based Prussian blue analogue (KxNi[Fe(CN)6]1-y·z(H2O)) as a cathode or anode active material for aluminum-ion secondary batteries, optimizing the reversible intercalation and deintercalation performance of aluminum ions by controlling the potassium (K) content within the crystal lattice.
Conventional active materials for aluminum-ion batteries, such as graphite, V2O5, TiO2, and Mo6S8, have suffered from low energy density due to the requirement for excessive electrolyte usage. Furthermore, they often react only in specific electrolytes or have unclear operating voltage ranges, making it difficult to achieve stable performance in both aqueous and non-aqueous electrolyte systems.
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This technology improves interfacial stability by adding calcium sulfate (CaSO4) to the surface of NCM cathode materials and performing heat treatment to form an artificial cathode-electrolyte interphase (CEI) layer functionalized with Ca2+ and SO42- ions.
High-nickel NCM cathode materials face issues where unstable Ni4+ generated during charging accelerates electrolyte decomposition. The accumulation of decomposition byproducts on the cathode surface blocks lithium-ion transport, leading to a rapid decline in cycling performance.
This technology involves mixing 0.1–0.5 wt% calcium sulfate with NCM cathode active material and heat-treating it to create a dual-functionalized CEI layer where Ca2+ bonds with oxygen and SO42- bonds with cations, including residual lithium. Applicable to NCM811-based high-energy EV batteries and long-life energy storage cells, it reduces the burden of residual lithium and slows the accumulation of surface byproducts.
This technology utilizes Allyl Phenyl Sulfone (APS), which contains both allyl and sulfone groups, as an additive in lithium-ion battery electrolytes. It forms a stable Cathode-Electrolyte Interphase (CEI) layer on the cathode surface and improves electrode interface stability by scavenging F- ions from the electrolyte.
Ni-rich NCM cathode materials face issues where electrolyte decomposition during charge/discharge cycles generates F- species, leading to transition metal dissolution and surface corrosion. This results in a significant decline in cycle performance under high-temperature conditions.
This technology uses an APS additive at a concentration of 0.1 wt% to less than 0.5 wt% of the total electrolyte weight. The sulfone group acts as an ion conductor and electronic insulator on the cathode surface to suppress electrolyte decomposition, while the allyl group reacts with nucleophilic F- ions to remove them. This approach can be applied to EV cells using high-nickel NCM cathodes and energy storage systems operating at high temperatures, strengthening the CEI layer and reducing capacity loss caused by transition metal dissolution with only a small amount of additive.
This technology utilizes a dual-curing polymer matrix composed of a blend of UV-curable acrylic and thermally curable epoxy polymers to simultaneously optimize the flexibility, ionic conductivity, mechanical stability, and substrate adhesion of polymer electrolytes.
Conventional gel polymer electrolytes have suffered from poor mechanical and environmental stability. Furthermore, adopting polymers with high adhesion often leads to a trade-off where increased rigidity results in reduced ionic conductivity.
This technology involves a dual-curing process using a composition of 25–35 wt% matrix-forming material (containing UV-curable compounds like PEGDA and thermally curable compounds like DGEBA in a 1:1 to 2:1 weight ratio) and 65–75 wt% ionic complex (consisting of alkali salts, plasticizers, and ionic liquids). It is ideal for electrochemical devices requiring strong substrate adhesion, such as flexible batteries, wearable pouch cells, and electrochromic devices, ensuring stable ion transport paths without delamination even under repeated bending.
This technology improves cycle stability and initial capacity by doping lithium nickel oxide (LNO) with hafnium (Hf) to enhance structural stability. It optimizes the hafnium concentration distribution between the particle interior and surface using a choice of precursor, solid-state, or hybrid manufacturing methods.
Lithium nickel oxides have historically suffered from structural instability due to oxygen decomposition and phase transition to a spinel structure during repeated charge-discharge cycles. This leads to rapid capacity degradation and performance loss caused by residual lithium accumulation on the surface.
This technology utilizes a base source of hafnium oxide and lithium hydroxide. The precursor method ensures uniform doping throughout the particle for cycle stability, the solid-state method increases surface doping concentration for higher initial capacity, and the hybrid method achieves both internal penetration and surface doping. Applicable to cobalt-free high-nickel cathodes for EVs and long-range mobility batteries, it reduces reliance on expensive cobalt while effectively minimizing residual lithium.
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 enhances the structural stability of LiMnO2-based cathode active materials by doping them with vanadium (V) at a molar ratio of 1:0.01–0.02 relative to manganese. It also utilizes a two-stage heat treatment process to suppress impurity formation, thereby improving charge-discharge efficiency and capacity.
Conventional LiMnO2-based cathode active materials have suffered from low capacity and degradation during repeated charge-discharge cycles. Furthermore, excessive doping often led to the formation of impurities such as Li3VO4, which hindered performance.
This technology precisely controls the vanadium-to-manganese molar ratio at 0.01–0.02 within the Li1+a(Mn1-bMb)1-aO2 (M=V) composition. By performing continuous heat treatment—a first stage at 400–600°C and a second stage at 450–750°C in an oxygen atmosphere—it increases crystallinity and minimizes impurity formation. Applicable to entry-level electric bicycle batteries aiming to reduce cobalt usage or to high-capacity manganese-based ESS cells, this technology paves the way for producing cathodes with reduced charge-discharge efficiency loss, even when using cost-effective manganese raw materials.
This technology implements a single-phase metal oxide, Li2-xTi1+xO3 (0 < x < 0.1), by precisely adjusting the Li/Ti ratio stoichiometrically. It overcomes the limitations of Li2TiO3, which previously hindered lithium-ion insertion and extraction, to achieve reversible charge-discharge reactions and a stable voltage plateau.
Conventional Li2TiO3-based anode active materials suffered from poor reversible lithium-ion insertion and extraction. This resulted in technical limitations, including the absence of a voltage plateau in charge-discharge curves and low discharge capacity.
This technology involves synthesizing Li2-xTi1+xO3 (ideally 0 < x ≤ 0.033) by mixing lithium and titanium sources and heat-treating them in an oxidizing atmosphere at 600–900°C to control the ratio of lithium to titanium within the crystal. Suitable for anodes in low-temperature, high-safety industrial batteries or smart grid auxiliary power sources where stable operating voltage is critical, it maintains a monoclinic structure while providing a distinct voltage plateau, significantly simplifying cell voltage management.
This technology enhances lithium-ion conductivity by applying a 1–20T magnetic field to a graphite anode active material slurry, adjusted to a viscosity of 2000–3900 cP, to align the layered crystal structure of the graphite in a specific direction.
Increasing electrode loading to boost the capacity of graphite anodes has historically restricted the pathways available for lithium-ion movement, creating a limitation where thicker electrodes suffer from reduced ion conductivity.
This technology optimizes viscosity to 2000–3900 cP by controlling the solvent content (such as NMP) to 5–10 wt% of the total slurry. It then induces c-axis alignment of the graphite crystals within a magnetic field, ensuring both uniform quality and improved ion conductivity. This process can be applied to anode coating for long-range electric vehicle batteries and fast-charging cells that require high-loading thick-film anodes, allowing for electrode designs that increase loading while reducing the risk of lithium plating.
This technology enhances lithium-ion conductivity by applying a magnetic field to a polycrystalline cathode active material slurry, aligning its crystal structure along the c-axis. By adjusting the solvent content to 5–10 wt%, the magnetic alignment efficiency is maximized within a viscosity range of 2500–3600 cP.
Polycrystalline cathode active materials typically exhibit lower lithium-ion conductivity than single-crystal counterparts, and previous attempts to address this have faced limitations in processability and cost. Specifically, improper slurry viscosity often resulted in poor magnetic alignment or compromised uniformity on the electrode surface.
This technology involves controlling the viscosity of a slurry composed of cathode active materials (such as LiNi0.5Mn0.3Co0.2O2), conductive agents, and polar aprotic solvents. By applying a 1–20T magnetic field to align the crystal orientation, the process manages XRD c-plane peaks to achieve a highly oriented cathode with a θRFA of 55.9–57.0 degrees. Applicable to EV batteries using ternary NCM cathodes and high-rate discharge power tool batteries, it offers the practical advantage of quantitatively managing alignment quality using XRD-based relative surface angle metrics.
This technology involves applying a strong magnetic field of 10T to 20T after coating a slurry of olivine-structured cathode active materials, such as lithium iron phosphate (LiFePO4), to force the active material crystals to align along the b-axis, which offers high lithium-ion conductivity.
Polycrystalline cathode active materials have inherent limitations in lithium-ion conductivity, and while single-crystal alternatives have been used to address this, they impose significant cost and efficiency burdens in commercial manufacturing. Consequently, there have been constraints on improving the power output and energy density of active materials.
This technology optimizes slurry conditions with a solvent content of 4–6 wt% and a viscosity of 3,000–3,500 cP. By applying a 10T–20T magnetic field to align crystals along the b-axis and subsequently rolling the material while maintaining this oriented structure, it ensures strong adhesion to the current collector and uniform film quality. This process can be applied to cathode production lines for LFP cells used in electric buses and power tools, as well as fast-charging ESS, enabling the creation of electrodes with shorter ion transport paths without the need for expensive single-crystal materials.
This technology improves interfacial stability by mixing N,N,N,N-tetraethylsulfamide (NTESA) with cathode active materials and applying heat treatment to form an artificial Cathode-Electrolyte Interphase (CEI) layer functionalized with amine and sulfone groups on the cathode surface.
Due to their high nickel content, Ni-rich NCM cathode active materials generate Ni4+ species during charging, which accelerate electrolyte decomposition. This leads to increased interfacial resistance between the electrode and electrolyte, resulting in reduced cycle life.
This technology involves mixing the NTESA additive at 1.0–5.0 wt% relative to the cathode material and heat-treating it at 400°C to modify the surface. The resulting amine/sulfone-functionalized CEI layer scavenges HF and prevents direct contact with the electrolyte, thereby suppressing electrolyte decomposition and transition metal dissolution. It can be applied to the post-processing stage for manufacturers of high-nickel cathodes like NCM811, reducing conversion costs by simply adding a mixing step to existing firing equipment.
