A lithium metal composite oxide having a layered structure, including at least lithium and an element X, wherein:the element X is at least one element selected from the group consisting of Co, Mn, Fe, Cu, Ti, Mg, Al, W, Mo, Nb, Zn, Sn, Zr, Ga, V, B, Si, S and P; the lithium metal composite oxide contains single particles and satisfies all of requirements (1) to (5):(1): a volume-based 50% cumulative particle size D.sub.50 of the lithium metal composite oxide is 2 μm or more and 10 μm or less; (2): the single particles have, on at least a part of surfaces thereof, adhered fine particles, with the proviso that a maximum particle size of the adhered fine particles is smaller than a particle size of the single particles; (3): the particle size of the single particles is 0.2 to 1.5 times D.sub.50 of the lithium metal composite oxide; (4): a particle size of the adhered fine particles is 0.01 to 0.1 times the D.sub.50 of the lithium metal composite oxide; and (5): an average number of the adhered fine particles adhered per particle of the single particles is 1 or more and 30 or less as measured with respect to a range observable in an image obtained by scanning electron microscope.

Embodiments of the present invention relate to a cathode active material, a method for manufacturing the same, and a lithium secondary battery including the same.

According to an embodiment, a cathode active material can be provided, the cathode active material comprising: a lithium metal oxide including a core and a shell disposed on a surface of the core; and a coating layer disposed on a surface of the lithium metal oxide, wherein a c value that satisfies Equation 1 and is in a range of 0.3 to 0.7, and the core and the shell have a layered crystalline structure.

c=b/a  [Equation 1]

(in Equation 1, a is a peak at 530 to 533 eV and b is a peak at 528 to 531 eV in an XPS spectrum of the coating layer)

The present invention relates to a carbonaceous material having a silicon element content of less than 200 ppm, a powder conductivity of 10.0 to 22.0 S/cm, a total amount of surface functional groups of 0.22 to 0.36 meq/g, and a pore volume of 0.10 to 0.20 cm.sup.3/g in terms of pores having a pore size of not less than 4 nm as measured by a BJH method.

Coated zirconia fine particle containing a zirconia fine particle and a coating layer coating the surface of the fine particle. The coating layer includes one or more metal elements selected from Mg, Ca, Al and rare-earth elements, and the coated zirconia fine particle has an average particle size of 3 to 100 nm and a specific surface area of 20 to 500 m.sup.2/g.

An impregnation liquid is provided, which includes (A) phenolic resin, (B) diazonaphthoquinone-based compound or a derivative thereof, (C) ionic compound, and (D) organic solvent. The weight of (A) phenolic resin and the weight of (B) diazonaphthoquinone-based compound or a derivative thereof have a ratio of 0.2:0.8 to 0.9:0.1, and the weight of (C) ionic compound and the total weight of (A) phenolic resin and (B) diazonaphthoquinone-based compound or a derivative thereof have a ratio of 0.2:1 to 1.4:1. The impregnation liquid can be used to form an activated carbon layer to wrap and to be directly in contact with the surface of a mesh.

A production method is provided in which submicronic particles containing silicon are incorporated into a matrix, wherein, during the incorporation of the particles, the particles are in a compacted state with a bulk density of more than 0.10 grams per cubic centimeter, and the compacted particles have a specific surface area at least 70% of that of the particles considered separately without contact between each other.

A precipitated silica characterised by the presence of specific acid sites on its surface and a process for its manufacture.

The present invention refers to a mineral matter powder preparation by wet process without acrylic additive or other grinding aid additives and to the use of said mineral matter after an optional hydrophobic treatment. Said mineral material having superior dispersing properties.

A precipitated silica suitable for thermal insulation applications and a process for its manufacture.

The present disclosure provides a cathode material and a method for preparing the cathode material, a cathode, a lithium ion battery and a vehicle. The cathode material comprises a matrix particle, wherein the matrix particle is a monocrystal particle comprising nickel lithium manganate and nickel cobalt lithium manganate. A position in the matrix particle close to a surface layer is provided with a buffer layer. A content of at least one of elements Ni, Co and Mn in the buffer layer is lower than contents thereof in other positions of the matrix particle. The cathode material has at least one of advantages of relatively high specific capacity, cycling stability, better safety performance and the like, and the buffer layer can alleviate erosion by an electrolyte and inhibit separation of active oxygen.