The present application discloses a positive electrode active material including a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60%-90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group R 3m; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200° C. or more, and an integral area of the main exothermic peak is 100 J/g or less.

The present disclosure relates to methodologies, systems and apparatus for generating lithium ion battery materials. Starting materials are combined to form a homogeneous precursor solution including lithium, and a droplet maker is used to generate droplets of the precursor solution having controlled size. These droplets are introduced into a microwave generated plasma, where micron or sub-micron scale lithium-containing particles are formed. These lithium-containing particles are collected and formed into a slurry to form lithium ion battery materials.

The present invention provides a method of preparing a positive electrode active material precursor for a lithium secondary battery, a method of preparing a positive electrode active material for a lithium secondary battery in which the positive electrode active material precursor prepared by using the above method is used, and a positive electrode for a lithium secondary battery and a lithium secondary battery which include the positive electrode active material.

A positive electrode active material for a lithium secondary battery and a method for preparing the same is disclosed herein. In some embodiments, a method comprises heating a mixed solution to combust the mixed solution into a powder, wherein the mixed solution includes a first fuel, a second fuel, a metal raw material, and water, and heat treating the powder wherein the first fuel is least one first fuel selected from the group consisting of urea, glycine, carbohydrazide, oxalyldihydrazide, and hexamethylenetetramine, the second fuel is at least one second fuel selected from the group consisting of citric acid, oxalic acid, sucrose, glucose, and acetylacetone, and the metal raw material includes a lithium raw material, a nickel raw material, a cobalt raw material, and a manganese raw material.

A method of producing a composite product is provided. The method includes providing a fluidized bed of metal oxide particles in a fluidized bed reactor, providing a catalyst or catalyst precursor in the fluidized bed reactor, providing a carbon source in the fluidized bed reactor for growing carbon nanotubes, growing carbon nanotubes in a carbon nanotube growth zone of the fluidized bed reactor, and collecting a composite product comprising metal oxide particles and carbon nanotubes.

A rechargeable lithium ion battery including: a positive electrode including coated particles, wherein each particle includes a core and a coating disposed thereon, wherein the core consists of Li, M, and O, and the coating includes Li, M, O, and AI2O3; wherein: M is (Ni.sub.z(Ni.sub.1/2Mn.sub.1/2).sub.yCo.sub.x).sub.1−kA.sub.k; 0.15≤z≤0.50; 0.17≤x≤0.30; 0.35≤y≤0.75; 0<k<0.1; x+y+z=1; and A includes Al and optionally at least one additional metal dopant selected from Mg, Zr, W, Ti, Cr, V, Nb, B, and Ca, and combinations thereof; and wherein the Li and M are present in the core in a molar ratio of Li to M of at least 0.95 and no greater than 1.10; a negative electrode; and a nonaqueous liquid electrolyte including: a lithium salt; a nonaqueous solvent; and an additive mixture including: prop-1-ene-1,3-sultone; at least one compound selected from tris(trimethylsilyl)phosphite, tris(trimethylsilyl)phosphate, tri-allyl phosphate, and combinations thereof; and at least one compound selected from methylene methanedisulfonate, 1,3,2-dioxathiolane-2,2-dioxide, and combinations thereof.

Embodiments related to cation-disordered lithium metal oxide compounds, their methods of manufacture, and use are described. In one embodiment, a cation-disordered lithium metal oxide includes Li.sub.aM.sub.bM′.sub.cO.sub.2 with a greater than 1. M includes at least one redox-active species with a first oxidation state n and an oxidation state n′ greater than n, and M is chosen such that a lithium-M oxide having a formula LiMO.sub.2 forms a cation-disordered rocksalt structure. M′ includes at least one charge-compensating species that has an oxidation state y that is greater than n.

The present invention relates to a method of preparing a positive electrode active material for a lithium secondary battery and the positive electrode active material for the lithium secondary battery prepared thereby, and more specifically, to a method of preparing a positive electrode active material for a lithium secondary battery, the method comprising doping or coating the positive electrode active material for the lithium secondary battery with a predetermined metal oxide, and the positive electrode active material for the lithium secondary battery which is prepared thereby and has a reduced amount of residual lithium.

An active material has: a core portion made of an active material base material; and a coating portion located on a surface of the core portion. The coating portion contains an element A comprising at least one selected from the group consisting of titanium (Ti), zirconium (Zr), tantalum (Ta), niobium (Nb), and aluminum (Al). The active material has two or more inflection point in a first-order derivative obtained with respect to a peak attributed to the element A, the first-order derivative being obtained based on a constituent element average intensity profile measured for the coating portion with use of an energy dispersive X-ray spectrometer.

A non-aqueous electrolyte secondary battery disclosed herein includes a positive electrode containing a positive electrode active material, a negative electrode, and a non-aqueous electrolyte, and the positive electrode active material includes a positive electrode active material particle containing a lithium transition metal compound, and a coating portion coating at least a part of a surface of the positive electrode active material particle. The coating portion contains a lithium ionic conductor containing lithium, a phosphoric acid group, and at least one element of lanthanum (La) and cerium (Ce).