The present invention provides a method for the manufacture of transition metal oxide fine particles, the method comprising the steps of: heating a strong-alkaline aqueous solution while stirring same; adding to and dissolving in the heated strong-alkaline aqueous solution a transition metal oxide; adding a strong-acid aqueous solution to the strong alkaline aqueous solution in which the transition metal oxide is dissolved, while stirring same, thereby re-dissolving a solid generated at the interface between the strong-alkaline aqueous solution and the strong-acid aqueous solution; adjusting the pH of the mixed aqueous solution resulting from mixing the strong-alkaline aqueous solution and the strong acid aqueous solution, through adjustment of the adding rate and amount of the strong-acid aqueous solution, to precipitate transition metal oxide fine particles; and separating the transition metal oxide fine particles from the mixed aqueous solution and sequentially washing, drying, and thermally treating the separated transition metal oxide fine particles.

Disclosed is a process for the selective removal of copper compounds, and other impurities with respect to molybdenum and rhenium, from concentrates of molybdenite (MoS.sub.2) with a copper content that is higher than 0.5% in dry weight.

Disclosed is a process for the selective removal of copper compounds, and other impurities with respect to molybdenum and rhenium, from concentrates of molybdenite (MoS.sub.2) with a copper content that is higher than 0.5% in dry weight.

The present invention provides a method for preparing an anode active material for a nonaqueous lithium secondary battery, comprising the steps of: preparing a carbon-based material; forming a precursor coating layer comprising Me and A (wherein A is O or S) on the surface of the carbon-based material; supplying a P precursor to the precursor coating layer of the carbon-based material; and converting at least a part of the precursor coating layer into a compound represented by Me.sub.x1P.sub.y1 (wherein x1>0 and y1>0) by the reaction of the precursor coating layer and the P precursor, thereby forming a phosphide coating layer, wherein Me is at least one type of the same metal element selected from among Mo, Ni, Fe, Co, Ti, V, Cr, Nb and Mn.

The present invention provides a method for preparing an anode active material for a nonaqueous lithium secondary battery, comprising the steps of: preparing a carbon-based material; forming a precursor coating layer comprising Me and A (wherein A is O or S) on the surface of the carbon-based material; supplying a P precursor to the precursor coating layer of the carbon-based material; and converting at least a part of the precursor coating layer into a compound represented by Me.sub.x1P.sub.y1 (wherein x1>0 and y1>0) by the reaction of the precursor coating layer and the P precursor, thereby forming a phosphide coating layer, wherein Me is at least one type of the same metal element selected from among Mo, Ni, Fe, Co, Ti, V, Cr, Nb and Mn.

A method of preparing remediated MoO.sub.3 from naturally-occurring molybdenum, or molybdenum that is enriched in one, the other or both of Mo-98 and Mo-100 isotopes from a particulate rhenium-containing MoO.sub.3 matrix that contains one, the other or both of those isotopes is disclosed as is the product remediated MoO.sub.3 that contains less than about 1000 ppt rhenium. In accordance with the invention, particulate rhenium-containing MoO.sub.3 matrix is heated in the presence of an oxygen-containing gaseous stream to a temperature of greater than about 300° C. and less than about 800° C. The temperature and oxidative sparging are maintained for a time sufficient to assure that rhenium has been oxidized to rhenium(VII), diffuses to form the dimer (Re.sub.2O.sub.7), and is then vaporizingly removed as Re.sub.2O.sub.7, while retaining the remediated MoO.sub.3.

A method of preparing remediated MoO.sub.3 from naturally-occurring molybdenum, or molybdenum that is enriched in one, the other or both of Mo-98 and Mo-100 isotopes from a particulate rhenium-containing MoO.sub.3 matrix that contains one, the other or both of those isotopes is disclosed as is the product remediated MoO.sub.3 that contains less than about 1000 ppt rhenium. In accordance with the invention, particulate rhenium-containing MoO.sub.3 matrix is heated in the presence of an oxygen-containing gaseous stream to a temperature of greater than about 300° C. and less than about 800° C. The temperature and oxidative sparging are maintained for a time sufficient to assure that rhenium has been oxidized to rhenium(VII), diffuses to form the dimer (Re.sub.2O.sub.7), and is then vaporizingly removed as Re.sub.2O.sub.7, while retaining the remediated MoO.sub.3.

A method of making an atomic layer nanoribbon that includes forming a double atomic layer ribbon having a first monolayer and a second monolayer on a surface of the first monolayer, wherein the first monolayer and the second monolayer each contains a transition metal dichalcogenide material, oxidizing at least a portion of the first monolayer to provide an oxidized portion, and removing the oxidized portion to provide an atomic layer nanoribbon of the transition metal dichalcogenide material. Also provided are double atomic layer ribbons, double atomic layer nanoribbons, and single atomic layer nanoribbons prepared according to the method.

An intermediate temperature solid oxide fuel cell (IT-SOFC) includes an anode layer, an electrolyte adjacent to the anode layer, and a cathode layer adjacent to the electrolyte and including a material of formula (I) or (II): Sr.sub.2OsO.sub.4 (I) or Ba.sub.2MO.sub.4 (II), where M is a transition metal or post-transition metal.

An intermediate temperature solid oxide fuel cell (IT-SOFC) includes an anode layer, an electrolyte adjacent to the anode layer, and a cathode layer adjacent to the electrolyte and including a material of formula (I) or (II): Sr.sub.2OsO.sub.4 (I) or Ba.sub.2MO.sub.4 (II), where M is a transition metal or post-transition metal.