Provided are a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing a cathode including the cathode active material, in which the cathode active material includes nickel-based lithium metal oxide containing single-crystal particles, and a particle size of the single-crystal particles is about 1 μm to about 8 μm, and a particle size distribution of the single-crystal particles expressed by (D90-D10)/D50 is 1.4 or less.

A positive electrode active material for an all-solid-state lithium-ion battery composed of particles containing crystals of a lithium metal composite oxide, wherein the lithium metal composite oxide has a layered structure and contains at least Li and a transition metal, and the positive electrode active material for an all-solid-state lithium-ion battery satisfies all Formulae (1) to (3).

A powder with particulates of a lithium ion-conducting material has a conductivity of at least 10.sup.−5 S/cm. The powder has an inorganic carbon content (Total Inorganic Carbon Content (TIC)) of less than 0.4 wt % and/or an organic carbon content (Total Organic Carbon Content (TOC)) of less than 0.1 wt %. The particulates have a d50 particle size in a range from 0.05 μm to 10 μm. The particulates have a particle size distribution log (d90/d10) of less than 4.

A lithium secondary battery which includes an electrode assembly in which a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate are wound in one direction, a battery can in which the electrode assembly is accommodated, and a sealing body which seals an open end of the battery can. The positive electrode plate includes positive electrode active material comprising single particles, quasi-single particles, or a combination thereof, and the positive electrode active material has D.sub.min of 1.0 μm or more.

A positive electrode active material precursor for a lithium secondary battery containing at least Ni, in which S/D.sub.50 that is a ratio of a BET specific surface area S to a 50% cumulative volume particle size D.sub.50 is 2×10 to 20×10.sup.6 m/g, and, in powder X-ray diffraction measurement using a CuKα ray, A/B that is a ratio of an integrated intensity A of a diffraction peak within a range of 2θ=37.5±1° to an integrated intensity B of a diffraction peak within a range of 2θ=62.8±1° is more than 0.80 and 1.33 or less.

Provided is a piezoelectric material filler including alkali niobate compound particles having a ratio (K/(Na+K)) of the number of moles of potassium to the total number of moles of sodium and potassium of 0.460 to 0.495 in terms of atoms and a ratio ((Li+Na+K)/Nb) of the total number of moles of alkali metal elements to the number of moles of niobium of 0.995 to 1.005 in terms of atoms. The present invention can provide a piezoelectric material filler having excellent piezoelectric properties, and a composite piezoelectric material including the piezoelectric material filler and a polymer matrix.

Described herein are low or no-cobalt materials useful as electrode active materials in a cathode for lithium or lithium-ion batteries. For example, compositions of matter are described herein, such as electrode active materials that can be incorporated into an electrode, such as a cathode. The disclosed electrode active materials exhibit high specific energy and voltage, and can also exhibit high rate capability and/or long operational lifetime.

A particle and a composition including a plurality of particles are provided, wherein the particles are platelets exhibiting a planar geometry which is circular or which is made up of a number (x) of planar (y)-sided polygon(s), wherein x is from 1 to 20 and y is at least 3 wherein if x is greater than 1 then said planar (y)-sided polygons are fused along one or more sides thereof, wherein the width (W.sub.P) of the platelets (P) at their widest point is no more than about 250 pm and the thickness of the platelets (P) is in the range of 10 nm to 50 nm.

A method and apparatus for generating nano particles, including but not limited to nano particles of Ceo, at high concentration. The invention uses a solid aerosol disperser in communication with a furnace tube having a vaporization chamber and a dilution chamber. A heating element surrounds the furnace tube. Heat from the heating element heats bulk materials contained within a gas flow in the vaporization chamber to a temperature sufficient to convert the bulk materials to a vapor phase. Vaporized bulk materials are then moved to a dilution chamber, where an inert gas is introduced through a dilution gas port. The flow of the inert gas into the dilution chamber through the dilution gas port is sufficient to eject the bulk material from the exit of the dilution chamber, thereby condensing the bulk material into nano sized particles in a gas flow of sufficient volume to prevent agglomeration of the nano sized particles.

The present invention relates to gold-colored effect pigment including a nonmetallic substrate in platelet form and a coating applied thereto, wherein the coating includes at least one spacer layer. The invention further relates to a process for production of and to the use of the gold-colored effect pigment.