A method for separating a metallofullerene M@C.sub.82, comprises steps of: a) adding a Lewis acid to an extract containing the metallofullerene M@C.sub.82 to react therewith, producing a complex precipitate; b) washing the precipitate, followed by dissolving and filtering to obtain a purified metallofullerene M@C.sub.82 extract, wherein M is one or more selected from the group consisting of lanthanide metals Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, and Lu; and the Lewis acid is one or more selected from the group consisting of zinc chloride, nickel chloride, copper chloride, zinc bromide, nickel bromide, and copper bromide.

The invention relates to a method for size-reducing silicon, wherein a mixture containing a suspension containing silicon to be size-reduced and silicon grinding media is set in motion in the grinding space of a grinding media mill. The size-reduced silicon is used as the active material in the anode of a lithium-ion battery.

A method of forming a graphene nanoribbon includes: 1) providing monomeric precursors each including an alkyne moiety and at least one aromatic moiety bonded to the alkyne moiety; 2) polymerizing the monomeric precursors to form a polymer; and 3) converting the polymer to a graphene nanoribbon.

The present invention provides a spherical boron nitride fine powder and the other superior in filling property into resin. The present invention relates to a spherical boron nitride fine powder having the following characteristics (A) to (C): (A) the spherical boron nitride fine particles have any one or more of Si, Ti, Zr, Ce, Al, Mg, Ge, Ga, and V in an amount of 0.1 atm % or more and 3.0 atm % or less in its composition on the surface of 10 nm; (B) the spherical boron nitride fine powder has an average particle diameter of 0.05 m or more and 1 m or less; and (C) the spherical boron nitride fine powder has an average circularity of 0.8 or more.

A fibrous carbon nanostructure dispersion liquid contains a solvent and fibrous carbon nanostructures having at least one absorption peak in a wavenumber region of 500 cm.sup.1 to 600 cm.sup.1 in a light absorption spectrum.

A nanoparticle of a decomposition product of a transition metal aluminum hydride compound, a transition metal borohydride compound, or a transition metal gallium hydride compound. A process of: reacting a transition metal salt with an aluminum hydride compound, a borohydride compound, or a gallium hydride compound to produce one or more of the nanoparticles. The reaction occurs in solution while being sonicated at a temperature at which the metal hydride compound decomposes. A process of: reacting a nanoparticle with a compound containing at least two hydroxyl groups to form a coating having multi-dentate metal-alkoxides.

A nuclear fuel element for use in a nuclear reactor may include a plurality of metal fuel sheaths extending along a longitudinal fuel element axis and spaced apart from each other, the plurality of fuel sheaths comprising a first fuel sheath having an inner surface, an opposing outer surface and a hollow interior configured to receive nuclear fuel material. A carbon coating may be on the inner surface of the first fuel sheath. The carbon coating may include more than 99.0% wt of a carbon material including more than 20% wt of carbon nanotubes and less than about 0.01% wt of organic contaminants.

The invention discloses nano magnesium hydride and an in-situ preparation method thereof, including disposing and stirring magnesium chloride and lithium hydride in an organic solvent under a protection of an inert atmosphere, so as to obtain an organic suspension of a mixture; performing an ultrasonic treatment to the organic suspension, so as to promote a chemical reaction of the mixture. After the reaction is completed, the suspension is filtered; the solid reaction product is washed, centrifuged and dried to remove residual organic matter, so as to obtain nano-magnesium hydride.

A positive electrode active material for a lithium secondary battery having improved high-temperature life and an increase in resistance, and a method for preparing the same are disclosed herein. In some embodiments, a positive electrode active material includes a powder of a positive electrode active material and a lithium boron compound coating layer on the surface of the powder, wherein the lithium boron compound coating layer has a peak intensity ratio of two peaks in the spectrum of Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) that is equal to the peak intensity ratio of the corresponding peaks of LiBO.sub.2 within a range of 50%.

A method of making a mercury based compound, a mercury based compound, and methods of using the mercury based compound and uses of the mercury based compound are disclosed. The mercury-based compound is in powder form and has the general chemical formula: M1.sub.aX.sub.b, where M1 is Hg, MxcMyd or a combination thereof, with Mx being Hg and My being an arbitrary element; wherein X is chloride, bromide, fluoride, iodide, sulphate nitrate or a combination thereof, wherein a, b, c and d are numbers between 0.1 and 10, wherein particles of the powder have a minimum average dimension of width of at least 50 nm and a maximum average dimension of width of at most 20 ?m, and wherein the mercury-based compound is paramagnetic and is present in an excited state.