There is provided a solution containing lithium and at least one of a niobium complex and a titanium complex, excellent in storage stability, and suitable for forming a coating layer capable of improving battery characteristics of an active material, and a related technique, which is the solution containing lithium, at least one of a niobium complex and a titanium complex, and ammonia, wherein an amount of the ammonia in the solution is 0.2 mass % or less.

There is provided a solution containing lithium and at least one of a niobium complex and a titanium complex, excellent in storage stability, and suitable for forming a coating layer capable of improving battery characteristics of an active material, and a related technique, which is the solution containing lithium, at least one of a niobium complex and a titanium complex, and ammonia, wherein an amount of the ammonia in the solution is 0.2 mass % or less.

A manufacturing method of ceramic powder includes: synthesizing barium titanate powder from barium carbonate, titanium dioxide, manganese carbonate, and one of ammonium molybdate and tungsten oxide, wherein: a solid solution amount of the donor element is 0.05 mol or more and 0.3 mol or less; a solid solution amount of the accepter element with respect to the barium titanate is 0.02 mol or more and 0.2 mol or less on a presumption that the amount of the barium titanate is 100 mol and the acceptor element is converted into an oxide; and relationships y≥−0.0003x+1.0106, y≤−0.0002x+1.0114, 4≤x≤25 and y≤1.0099 are satisfied when a specific surface area of the ceramic powder is “x” and an axial ratio c/a of the ceramic powder is “y”.

A precursor solution of a negative electrode active material according to the present disclosure contains at least one kind of organic solvent, a lithium compound that exhibits solubility in the organic solvent, and a titanium compound that exhibits solubility in the organic solvent. The lithium compound is preferably a lithium metal salt compound. The titanium compound is preferably a titanium alkoxide.

The invention provides a method for preparing lithium-containing particles suitable for use in an electrode of a battery, the method including forming a mixture comprising titanium dioxide precursor particles and an aqueous solution of a lithium compound; and heating the mixture at elevated temperature in a sealed pressure vessel in order to form lithium-inserted titanium dioxide particles, wherein at least one particle size characteristic selected from average primary particle size, particle size distribution, average intra-particle pore size, average inter-particle pore size, pore size distribution, and particle shape of the titanium dioxide particles is substantially unchanged by said heating step. The invention further includes a battery including a first electrode, a second electrode, and a separator including an electrolyte between the first and second electrodes, wherein one of the first and second electrodes comprises lithium-inserted titanium dioxide particles or lithium titanate spinel particles made according to the invention.

The present invention relates to a material of the formula SnTiO.sub.3 having a crystal structure comprised of layers, wherein the layers comprise Sn(II) ions, Ti(IV) ions and edge-sharing O.sub.6-octahedra, the edge-sharing O.sub.6-octahedra form a sub-layer, the Ti(IV) ions are located within ⅔ of the edge-sharing O.sub.6-octahedra, thus forming edge-sharing TiO.sub.6-octahedra, the edge-sharing TiO.sub.6-octahedra form a honeycomb structure within the sub-layer, the honeycomb structure comprising hexagons with Ti(IV)-vacancies within the hexagons, the Sn(II) ions are located above and below the Ti(IV)-vacancies with respect to the sub-layer, the Ti(IV) ions are optionally substituted with M, M is one or more elements selected from Group 4 and Group 14 elements, and the crystal structure satisfies at least one of the following features (i) and (ii): (i) the Sn(II) ions have a tetrahedral coordination sphere involving three O ions of the layer and the electron lone pair of the Sn(II) ions which is situated at an apical position relative to the three O ions of the layer, (ii) the layers are stacked so that each layer is translated relative to each adjacent layer by a stacking vector S1 or a stacking vector S2, the centers of adjacent hexagons form a parallelogram with a side having a length x and side having a length y, the stacking vector S1 is a combined translation along the side having the length x by ⅔ x and along the side having a lengthy by ⅓ y, the stacking vector S2 is a combined translation along the side having the length x by ⅓ x and along the side having a lengthy by ⅔ y, and the crystal structure comprises layers translated relative to adjacent layers by the stacking vector S1 and layers translated relative to adjacent layers by the stacking vector S2. The present invention is further directed to a material of the formula SnTiO.sub.3 having a tetragonal perovskite-type crystal structure, a method for the preparation of SnTiO.sub.3, a device comprising a ferroelectric material and a use of the material of the formula SnTiO.sub.3 in a ferroelectric element.

A negative electrode active material including lithium titanium oxide particles, wherein the lithium titanium oxide particles have a Na content of 50 ppm-300 ppm, a K content of 500 ppm-2400 ppm and a crystallite size of 100-200 nm, and a lithium secondary battery including the same.

The invention discloses a preparation method of an anode material for lithium-ion batteries, comprising: dispersing tetrabutyl titanate in glycerol solvent and adding hexadecyl trimethyl ammonium bromide solution, adding tetramethylammonium hydroxide to adjust Ph; then adding ammonium fluoride solution, heating at 150-200° C. for 1˜6h, the product was centrifuged, washed, and dried in vacuum to obtain titanium/nitrogen/fluorine-doped porous titanium dioxide; preparing the titanium/nitrogen/fluorine-doped porous titanium dioxide organic solution, and then adding lithium salt solution, then adding graphite, mixing uniformly, and spray drying to obtain porous lithium titanate-coated graphite composites; taking porous lithium titanate-coated graphite composites and ammonium fluoride, placing them in a tube furnace, heating them under the protection of argon, and then heating them up to carbonization. The invention can improve the first-time efficiency of graphite composites and their power performance.

A method of manufacturing a mixed metal oxide powder is provided. The method includes steps of mixing two or more metal precursors in a solvent to form a dispersion of the metal precursors in the solvent; drying the dispersion to obtain a dried mixed metal precursor powder; jet milling the dried mixed metal precursor powder to obtain particles having a size distribution in a range of 0.2-20 micrometers; and exposing the particles to a hydrocarbon flame or oxygen plasma to provide the mixed metal oxide powder. Mixed metal oxide powders produced by the disclosed methods are also provided.

Provided is a potassium titanate powder that can avoid safety and health concerns and concurrently, during use in a friction material, can give excellent frictional properties. A potassium titanate powder is a powder formed of bar-like potassium titanate particles having an average length of 30 μm or more, an average breadth of 10 μm or more, and an average aspect ratio of 1.5 or more, wherein the bar-like potassium titanate particles are represented by a composition formula K.sub.2Ti.sub.nO.sub.2n+1 (where n=5.5 to 6.5).