The present invention relates to a process for preparing coated zinc oxide particles by means of flame spray pyrolysis technology, to coated zinc oxide particles, and to a composition comprising said particles. The present invention also relates to specific zinc oxide particles derived from such a process, to the compositions comprising such particles and also to the uses thereof.

The present disclosure provides a cobalt-free lamellar cathode material of a lithium ion battery, a method for preparing the cobalt-free lamellar cathode material, and a lithium ion battery. The cobalt-free lamellar cathode material comprises lamellar nickel lithium manganate of monocrystal morphology and zinc oxide coated onto a surface of the nickel lithium manganate, wherein a general formula of the nickel lithium manganate is LiNi.sub.xMn.sub.1−xO.sub.2, and 0.95. Therefore, manganese ions in nickel lithium manganate can be effectively prevented from being dissolved by an electrolyte of the lithium ion battery by coating the surface of the lamellar nickel lithium manganate of monocrystal morphology with zinc oxide, such that the specific capacity, the first time charge efficiency (first efficiency for short) and the cycle performance of the lithium ion battery can be further effectively improved.

A lithium titanate/titanium niobate core-shell composite material includes a core which comprises lithium titanate; and a shell which is cladded over the core and comprises titanium niobate. A preparation method of lithium titanate/titanium niobate core-shell composite material includes (A) mixing lithium titanate powder and titanium niobate powder; and (B) granulating the mixture produced by step (A) through a spray granulation process to obtain a lithium titanate/titanium niobate composite material with titanium niobate cladding over lithium titanate. The lithium titanate/titanium niobate core-shell composite material and the preparation method thereof can be applied to a battery.

The present invention relates to a composite and a manufacturing method thereof, wherein the composite includes a base powder, an adhesive disposed on the surface of the base powder, and functional particles disposed on the adhesive, wherein the adhesive includes at least one of a fatty primary monoamide and a fatty secondary monoamide.

This positive electrode active material for nonaqueous electrolyte secondary batteries contains a lithium transition metal composite oxide which contains 80% by mole or more of Ni relative to the total number of moles of the metal elements excluding Li, and at least one of Mn and Al, wherein: the total amount of Mn and Al is 5% by mole or more relative to the total number of moles of the metal elements excluding Li; and with respect to a filtrate of a suspension, which has been prepared by adding 250 mg of the positive electrode active material to 10 mL of a 17.5 mass% aqueous solution of hydrochloric acid, dissolving the positive electrode active material therein by 2-hour heating at 90° C., and subsequently diluting the solution to 50 mL, the elution amount of S in the filtrate as determined by inductively coupled plasma mass spectrometry is 0.002 mmol or more.

A method of producing core/shell semiconductor nanoparticles, the method comprising a shell formation step of adding a solution of group VI element precursor while adding a solution of zinc branched chain carboxylate to a core particle-dispersed solution to allow the zinc branched chain carboxylate to react with the group VI element precursor in presence of the core particles for forming a shell containing zinc and the group VI element on surfaces of the core particles. The present invention can provide a simple semiconductor nanoparticle production method of producing core/shell semiconductor nanoparticles with excellent optical properties when two or more types of the shell precursors are used to produce the core/shell semiconductor nanoparticles.

The method of preparing a positive electrode capable of reducing the usage amount of a rinsing solution, and minimizing the surface degradation of a positive electrode active material is provided. A method of preparing a positive electrode active material includes: (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a rinsing solution and performing rinsing and drying, wherein the rinsing solution includes one or more additive of LiOH, NaOH, or KOH, the additive is included in an amount of 3,000 ppm to 18,000 ppm relative to the lithium transition metal oxide in the rinsing solution, and the rinsing solution has a pH of 12 or more.

The positive electrode active material of the present disclosure includes a complex oxide represented by a formula (1): LiNi.sub.xMe.sub.1-xO.sub.2 as a main component and contains water generated during heating at 300° C. in Karl Fischer titration in an amount of 317.5 ppm by mass or less. Here, x satisfies 0.5 ≤ x ≤ 1, and Me is at least one element selected from the group consisting of Mn, Co, and Al.

A positive active material precursor for a rechargeable lithium battery, a method for preparing a positive active material using the same, and a positive active material for a rechargeable lithium battery are provided. The positive active material precursor for a rechargeable lithium battery has a form of a core-shell particle including a core and a shell around the core, where the core includes a nickel-manganese-based composite hydroxide containing nickel and manganese, the shell includes a nickel-manganese-based composite hydroxide containing nickel, manganese, and a pillar element, and the pillar element includes at least one selected from Al, Mo, Ti, W, and Zr.

The present invention relates to a process for preparing oxide particles, in particular metal oxide particles, coated with silicon oxide by means of flame spray pyrolysis technology, to oxide particles, in particular metal oxide particles, coated with silicon oxide, and to a composition comprising said particles. The present invention also relates to specific oxide particles, in particular metal oxide particles, coated with silicon oxide derived from such a process, to the compositions comprising such particles and also to the uses thereof.