Lithium Nickel Manganese Oxide Cathodes for EV Batteries

Positive electrode material for lithium-ion batteries with reduced transition metal elution compared to conventional lithium manganese oxides. The material is a lithium-excessive lithium manganese oxide with a unique composition and structure. It contains a solid solution or composite of phases with different crystal structures. The material is formed as core-shell particles with a concentration gradient of transition metals from the core to shell. The shell region has higher concentration of transition metals with lower elution probability compared to the core. This suppresses transition metal elution. Additionally, a barrier layer on the particle surface further reduces transition metal elution. This composition and structure prevents transition metal contamination of the electrolyte and cathode during cycling, improving battery lifespan and stability.

Source

High-nickel ternary lithium-ion battery cathode material with improved structural stability, cycling performance, and energy density at elevated temperatures. The material is made by a controlled ion exchange and anion doping process. The ion exchange involves dispersing the precursor in a cation exchange solution, filtering, and low-temperature heat treatment to form spinel/layered mixed phases. Anion doping fills holes and stabilizes the surface structure. This reduces cracking, side reactions, and SOC increase compared to high-temperature sintering.

Source

Cathode material for lithium-ion batteries with improved high temperature stability and cycle life compared to conventional high energy density cathode materials. The cathode has lithium nickel compound particles with a porous structure and distributed erythium oxide particles within the pores. The porous structure reduces agglomeration, improves dispersion, and surface area. The erythium oxide particles enhance cycle stability and thermal stability due to their chemical resistance and buffering effect on stress. Adding metal oxides like aluminum trioxide and zinc oxide in the shell further improves cycle stability and energy density.

Source

Composite cathode material, electrode system, and lithium-ion battery to improve the cycle life and capacity of lithium-ion batteries for electric vehicles. The composite cathode material contains a ternary material like NMC, lithium iron manganese phosphate (LMFP), and lithium manganate (LMO) along with a small amount of lithium supplement material. This helps mitigate cation mixing and improve cycle performance compared to just using NMC. The electrode system has the composite cathode on a positive electrode with a lithium-replenishing coating, and a negative electrode with graphite and silicon oxide. The lithium-replenishing coating helps compensate for lithium loss during cycling.

Source

Positive electrode material, sheet, and battery for lithium-ion batteries with improved safety and cycle life. The positive electrode material is a lithium-nickel composite oxide with specific nickel and lithium mol ratios of (0.5-0.96):1. The material has controlled thermal decomposition temperatures during charging and discharging to prevent thermal runaway. The sheet and battery using this material have better cycle stability and reduced risk of thermal events compared to conventional lithium-nickel oxides.

Source

A lithium-rich manganese-based cathode material for lithium-ion batteries with improved performance and stability compared to conventional lithium-rich manganese cathodes. The new cathode material has a core-shell structure with a spinel phase lithium-nickel-manganese oxide core surrounded by a layered lithium-rich manganese oxide shell. This configuration stabilizes the crystal structure, prevents internal lithium ion polarization, and reduces gas generation during cycling compared to layered lithium-rich manganese cathodes. The core-shell structure also improves rate performance.

Source

High-capacity lithium battery cathode material with improved stability and lifespan. The material is an overlithiated lithium transition metal oxide containing phases complexed together. It has a layered crystal structure with some lithium ions substituted into the transition metal layer. Doping the material with certain metal cations like Al, Mg, Ga, Ti, V, Zn, Cu, Cr, V, Sr, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, and In improves stability and reduces capacity fade. The dopant content is 0.1-10 mol%. The overlithiated lithium transition metal oxide can contain up to 20 mol% of the overlithiated phase to balance capacity and stability.

Source

Coating a lithium nickel manganate cathode material for lithium-ion batteries with a nano-scale inorganic solid electrolyte like LiAlSiO4 to improve its high voltage and high temperature performance. The coating amount is 0.2-1% of the lithium nickel manganate mass. The coated cathode material has better cycling stability and capacity retention compared to uncoated lithium nickel manganate at high voltages and temperatures.

Source

Doped lithium battery cathode material with improved cycling performance and energy density at high temperatures. The material is a composite of 92-96% ternary lithium nickel manganese oxide (NMC) and 4-8% of a dopant mixture containing iron sulfide, manganese sulfide, and titanium disulfide. This doped NMC cathode material shows lower electrode polarization and better cycling stability at elevated temperatures compared to plain NMC cathodes.

Source

A coating method to improve the cycling stability of lithium-ion battery cathode material lithium nickel manganese oxide (LiNi0.5Mn1.5O4). The coating involves treating the LiNi0.5Mn1.5O4 powder with an aqueous solution containing a polymer like polyacrylic acid (PAA) or polyvinyl alcohol (PVA) followed by drying. The coating prevents Jahn-Teller distortion, manganese ion disproportionation, and electrolyte dissolution during cycling, resulting in improved cycling stability.

Source

Lithium secondary battery with improved performance at low and high temperatures. The battery uses a cathode active material composed of a lithium nickel-manganese-cobalt composite oxide coated with a layer containing Al and W. The coating improves output and lifetime characteristics at ordinary, low, and high temperatures compared to uncoated cathode materials. The composite oxide has a specific formula with nickel, manganese, cobalt, lithium, and optional dopants.

Source

Cathode active material for lithium secondary batteries with improved capacity and thermal stability compared to traditional cathode materials. The material is a nickel-rich oxide composition with specific dopant ratios. The composition is represented by the formula LiNixCoyMnzAlbMgcO2, where 0 < z < 0.025, 0.001 < b < 0.02, 0 < c < 0.02, b > c, x + y + z + b + c = 0.96 < a < 1.04. The dopants are Al and Mg, in addition to the usual Ni, Co, and Mn. This composition provides higher capacity and better thermal stability compared to similar oxides without the Al and Mg dopants.

Source

Positive electrode material for lithium-ion batteries with improved thermal stability and conductivity. The material is a lithium nickel manganese oxide with dissolved niobium in the primary particles. The niobium coating reduces conductivity while the dissolved niobium in the primary particles improves thermal stability. The niobium is added during a mixing step after crystallization of the nickel-manganese hydroxide particles. Firing converts the hydroxide to oxide. This allows controlling niobium distribution in the particles.

Source

High-voltage, high-energy density lithium-ion batteries with advanced cathode materials that improve cycling life, volumetric energy density, and rate capability compared to conventional lithium-ion batteries. The cathode active material is a stabilized lithium transition metal oxide with composition xLi2MO3 · (1-x) LiCOyM' (ly)02, where M is a transition metal like Co or Mn, and M' is a transition metal like Ni. The stabilization prevents capacity fade and degradation during cycling. The battery cells have anodes and cathodes with current collectors, with the stabilized lithium oxide cathode material providing the improved performance.

Source

Positive electrode active substance for lithium-ion batteries that improves cycle life and reduces capacity fade in large-format batteries like those used in electric vehicles. The active substance is a lithium-nickel-manganese-cobalt oxide with a specific true density range of 4.40 to 4.80 g/cm3. This density range prevents excessive expansion and contraction of the active material during charging and discharging that can cause cracking and capacity loss in large format batteries. The density range can be achieved by adjusting the metal composition and impurity doping levels in the active material.

Source

Lithium battery material system with optimized components for improved performance. The system includes a high-capacity positive electrode material (LiNi0.5-0.8Co0.2-0.5Mn0.1-0.3Al0.1-0.5) like LiNi0.8Co0.2Mn0.1Al0.1O2, a high-capacity negative electrode material like artificial graphite or hard carbon with ≥335 mAh/g specific discharge capacity, a thin separator like A12O3-modified polyolefin with thickness <30 µm, low-temperature electrolyte like LiPF6 organic solution, graphene-coated aluminum and thin copper current collectors, and a graphene-coated aluminum positive electrode sheet made by coating the slurry onto the fo

Source

Lithium ion secondary battery with improved cycle life at high temperatures using a specific composition of lithium nickel composite oxide in the positive electrode. The composition is LiNixCoyMnzO2 with x = 0.75-0.85, y = 0.05-0.15, and z = 0.10-0.20. This provides better capacity retention over charge/discharge cycles compared to conventional lithium nickel oxide compositions. The battery also uses specific ratios of graphite and non-graphitized carbon in the negative electrode. The graphite:non-graphitized carbon mass ratio is 80:20 to 95:5, with 85:15 being most preferred.

Source

Cathode active material for high-voltage lithium-ion batteries that exhibits high potential and improved high-temperature life. The material is a spinel oxide with a composition of LiaNixMnyMzO4-5Fδ, where M is one or more elements like Ti, Ge, Mg, Co, Fe, Cu, and Al. The formula constraints a, x, y, z, and δ to specific ranges. This composition substitutes transition metals for manganese and fluorine into the spinel structure to stabilize high potential and suppress degradation. It improves the high-voltage stability and cycle life of lithium-ion batteries operating at voltages above 4.5 V.

Source

A high cycle life lithium-ion battery positive electrode material that can withstand high charging voltages without degradation. The material is a lithium composite oxide with high thermal conductivity. It contains a specific lithium oxide formula and also adds compounds like AlN, BN, or Si3N4 to further boost thermal conductivity. This prevents excessive heat buildup during charging, improving cycle life compared to conventional high voltage cathodes.

Source

Lithium secondary battery with improved cycle life and safety by using a cathode active material with a mixture of spinel lithium manganese oxide and lithium-nickel-cobalt-manganese oxide, where at least one oxide has an average particle size over 15 microns. This larger particle size prevents manganese ion generation and electrolyte contamination during high current charging and discharging, improving cycle life and safety compared to smaller particle size cathode materials.

Source

High-temperature stable cathode material for lithium-ion batteries that maintains capacity and performance at elevated temperatures. The cathode material is a spinel oxide with composition Mn2+xMn3+yNi2+zAl2+2-x-y-zCoxFe2+-2-x-y-zO4 (where x, y, z, and Co are adjustable doping levels). The material is prepared by mixing metal precursors, leaching to form a complex, sintering, and surface coating. The doping and complex formation reduce Mn3+ content and improve crystal lattice stability. The coating enhances electrolyte compatibility. This provides high-temperature cathode material for lithium-ion batteries with improved capacity, cycle life, and electrochemical stability at elevated temperatures.

Source

Cathode material for lithium-ion batteries with improved high temperature stability, cycle life, and gas generation resistance. The material is a lithium nickel-manganese-cobalt oxide (LiNi1-x-yMxyCozO2) with a unique surface coating. The surface is coated with a mixture of an ionic conductive solid compound and conductive carbon. This coating improves high temperature stability compared to uncoated oxide materials. The coating also prevents gas generation during charging by reducing impurities. The coating ratio of the solid compound to carbon can be adjusted.

Source

Positive electrode material for lithium-ion batteries that has improved thermal stability compared to conventional lithium nickel cobalt oxide (NCO) cathode materials. The material is a composite of NCO, aluminum-substituted NCO (Al-NCO), and lithium nickel manganese cobalt oxide (NMC). This composite cathode can be used in non-aqueous electrolyte lithium-ion batteries. The composite cathode has better thermal stability compared to NCO alone due to the Al-NCO and NMC components. This allows higher charging temperatures without degradation, enabling improved battery performance and safety.

Source

High-power, long-life lithium-ion battery cathode with improved safety and lifespan for electric vehicles. The cathode active material is a mixture of two lithium oxides: a spinel lithium manganese oxide with some oxygen substituted by other anions, and a lithium nickel-cobalt-manganese oxide. The spinel substitution improves stability and lifespan, while the nickel-cobalt-manganese oxide enhances safety and capacity. Together they provide a balanced set of properties for EV batteries.

Source

Improved lithium-nickel-based cathode materials for high energy density lithium-ion batteries that have better safety and stability compared to conventional lithium-nickel-oxide cathodes. The improved cathode contains nickel-rich lithium nickel oxide (LNO) particles with a unique physical contact between the LNO surface and lithium nickel manganese oxide (LNMO) particles. This contact helps prevent gas generation, swelling, and impurity accumulation issues that degrade battery performance and safety.

Source

High-power lithium secondary battery with improved safety and cycle life for electric vehicles. The battery uses a unique positive electrode active material made by mixing two lithium oxide composites: spinel-structured lithium manganese-metal oxide and layered-structured lithium nickel-manganese-cobalt oxide. The specific composition of the metal elements in each oxide is important for battery safety and cycle performance. This mixed active material provides superior safety, capacity retention, and cycle life compared to using just one of the oxides.

Source

Non-aqueous electrolyte secondary battery with improved safety, energy density, and float life characteristics for large-size applications. The battery uses a positive electrode with three types of cathode materials: a manganese-based spinel oxide, a nickel-cobalt-manganese layered oxide, and a lithium-nickel-cobalt layered oxide. The compositions of these materials are optimized to balance safety, energy density, and float life.

Source

Positive electrode material for lithium ion batteries that enables higher capacity, improved cycling stability, and lower resistance compared to conventional lithium cobalt oxide cathodes. The material is lithium nickel manganese oxide where a portion of the lithium layer is substituted with alkali or alkaline earth metals like sodium or magnesium. This substitution prevents structural changes during charging/discharging that can distort the crystal structure and increase resistance. It also allows lowering the valence of manganese to maintain conductivity while substituting oxygen with nitrogen or phosphorus to compensate for charge balance.

Source

A lithium-ion battery with improved charge/discharge efficiency and capacity using a specific composition of lithium nickel manganese oxide in the positive electrode. The lithium nickel manganese composite oxide has a formula Li[Li]xNiyMnzO2-a where 0 < x < 0.4, 0.12 < y < 0.5, 0.3 < z < 0.62, 0a < 0.5, and x, y, z satisfy certain relationships. Adding metal elements with valences of 4-6 further improves efficiency. This composition provides better initial charge/discharge efficiency and discharge capacity compared to conventional lithium nickel manganese oxides.

Source

Lithium secondary battery with improved cycle life and power density for electric vehicles. The battery has a cathode containing a layered lithium-nickel-manganese-cobalt oxide compound, plus a layered lithium-manganese oxide distributed within it. This distribution suppresses volume changes of the cathode active material during charging/discharging, preventing capacity fade and crystal structure destabilization. The specific conditions for the layered oxides composition and distribution are provided to achieve optimal performance.

Source

A high-power lithium-ion battery with improved cycle life and safety for electric vehicles. The battery uses a mixed positive electrode active material composed of a spinel lithium manganese oxide with substituted metals and lithium nickel cobalt manganese oxide. The spinel lithium manganese oxide with substituted metals improves safety by reducing manganese dissolution compared to pure lithium manganese spinel. The lithium nickel cobalt manganese oxide further enhances safety and cycle life. Mixing the two oxides in specific ratios provides optimal balance of safety, capacity, and cycle life for lithium-ion batteries.

Source

A high power lithium secondary battery with improved life characteristics and stability even after repeated charging and discharging with a large current. The battery uses a positive electrode containing a mixture of two cathode active materials: a lithium manganese spinel oxide and a lithium nickel cobalt manganese composite oxide. The spinel oxide has an average particle size of 15 microns or larger. This improves battery life by reducing electrolyte decomposition and manganese dissolution compared to smaller particle sizes. The mixture of oxides provides better safety and life compared to using just one oxide.

Source

Rechargeable lithium battery with improved power characteristics over a wide charge range. The battery uses a specific composition of lithium-containing transition metal oxide in the positive electrode active material. The oxide has a crystal structure belonging to the R3m space group. It contains nickel and manganese with lithium as the first lithium-containing transition metal. This composition enables the battery to demonstrate high power homogeneity across a wide charge depth, making it suitable for applications like electric vehicles.

Source

High reliability and long life lithium-ion batteries for electric vehicles that overcome the limitations of conventional lithium-ion batteries. The batteries use a composite positive electrode active material made from a mixture of lithium manganese oxide (LiMn2O4) and lithium nickel cobalt manganese oxide (LiNixMnyCozO2) in specific weight ratios. The composite increases capacity per battery weight compared to pure LiMn2O4. The composite has average primary particle size of 1-2um and secondary particle size of 8-15um. This allows higher load discharge efficiency and capacity retention compared to pure LiMn2O4. The composite composition ranges from 90% LiMn2O4 to 70% LiMn2O4 with 10-30% LiNixM

Source

Improving the cycle life of lithium ion batteries for applications like electric vehicles by combining two specific types of positive electrode materials. The first material is a lithium nickel composite oxide with high surface area (2 m2/g or more). The second material is a lithium manganese composite oxide with lower surface area (less than 2 m2/g). Using these specific surface area ranges for the nickel and manganese oxides in combination provides better capacity retention compared to just using one material.

Source