Process for preparing alumina gel in a single precipitation step consisting of dissolving an aluminium precursor, aluminium chloride, in water, at a temperature of 10° C. to 90° C. such that the pH of the solution is from 0.5 to 5, for a period of 2 to 60 minutes, then adjusting the pH to 7.5 to 9.5 by adding a basic precursor, sodium hydroxide, to the solution obtained to obtain a suspension, at a temperature of 5° C. to 35° C., and for 5 minutes to 5 hours, followed by a filtration step, said process not comprising any washing steps. Also, novel alumina gel having a high dispersibility index, in particular a dispersibility index of more than 80%, a crystallite dimension of 0.5 to 10 nm, a chlorine content of 0.001% to 2% by weight and a sodium content of 0.001% to 2% by weight, the percentages by weight being expressed with respect to the total weight of the alumina gel.

Disclosed are a multi-wall carbon nanotube (MWCNT) formed using arc discharge and a method for manufacturing the same. The carbon source of the anode and boron that is the doping source, are evaporated through arc discharge and then deposited on the surface of the cathode to form MWCNTs, and boron is evenly distributed in the multi-walls of the MWCNTs. Therefore, the outer diameter of the MWCNT is reduced, high thermal stability is secured, and the effect of improving the field emission characteristics can be obtained.

The present invention provides pitch-based ultrafine carbon fibers containing nitrogen atoms, wherein the average fiber diameter is more than 100 nm but not more than 900 nm; the content of the nitrogen atoms as determined by X-ray photoelectron spectroscopy (XPS) is 1.00% by atom or less; and the true density is from 1.95 to 2.20 g/cm.sup.3.

Disclosed herein are embodiments of doped and undoped spherical or spheroidal lithium lanthanum zirconium oxide (LLZO) powder products, and methods of production using microwave plasma processing, which can be incorporated into solid state lithium ion batteries. Advantageously, embodiments of the disclosed LLZO powder display a high quality, high purity stoichiometry, small particle size, narrow size distribution, spherical morphology, and customizable crystalline structure.

A laminated body includes: a porous base material containing a polyolefin-based resin as a main component; and a porous layer which is disposed on at least one surface of the porous base material and which contains a polyvinylidene fluoride-based resin, the laminated body being arranged so that: a diminution rate of diethyl carbonate dropped on the porous base material is 15 sec/mg to 21 sec/mg; a spot diameter of the diethyl carbonate 10 seconds after the diethyl carbonate was dropped on the porous base material is not less than 20 mm; and the polyvinylidene fluoride-based resin containing crystal form α in an amount of not less than 36 mol % with respect to 100 mol % of a total amount of the crystal form α and crystal form β contained in the polyvinylidene fluoride-based resin. A nonaqueous electrolyte secondary battery separator made of the laminated body is not easily curled.

A manufacturing method of a sulfide solid electrolyte, includes: heat-treating a starting material containing a lithium element, a sulfur element, and a phosphorous element to obtain an intermediate; and heating and melting the intermediate in an atmosphere of a gas comprising a sulfur element. In the heat treatment, the starting material may be heated at a temperature in a range of 250° C. to 500° C.

A titanium oxide powder of the present invention contains a polyhedral-shaped titanium oxide particles, in which each particle of the polyhedral-shaped titanium oxide particles has eight or more faces and an average primary particle diameter is 300 nm or higher and 1000 nm or lower, and a crystallinity is 0.95 or higher.

Described is a composite material composed of an atomically thin (single layer) amorphous carbon disposed on top of a substrate (metal, glass, oxides) and methods of growing and differentiating stem cells.

Described is a fuel cell comprising an electrode catalyst assembly, and a two-dimensional (2D) amorphous carbon, wherein the 2D amorphous carbon has a crystallinity (C)≤0.8.

A tool with a through hole includes a base and a diamond component held by the base, and when the length of the diamond component along a center line of the through hole is denoted as L1 and the maximum value of a diameter of a circle having the same area as a region surrounded by an outer edge of the diamond component in a cross section having the center line as a normal line is denoted as M1, the ratio L1/M1 between L1 and M1 is 0.8 or more.