51results about "Boron oxides" patented technology

The purpose of the present invention is to provide: an enhanced electrolyte for power storage devices in which electrical resistance is reduced and it is possible to maintain high capacity even afterrepeated charging and discharging; and a power storage device. Provided is an electrolyte for power storage devices that is characterized by containing a lithium-containing complex compound represented by formula (1), formula (2), formula (3), formula (4), or formula (5) indicated below. Formula (1): (Li)m(A)n(UFx)y. Formula (2): (Li)m(Si)n(O)q(UFx)y (in formulas (1) and (2), A is O, S, P, or N, Uis a boron atom or a phosphorus atom, m and n each independently represent a number between 1 and 6 inclusive, q is a number between 1 and 12 inclusive, x is 3 or 5, and y is a number between 1 and 6inclusive). Formula (3): (Li)m(O)n(B)p(OWFq)x (in the formula, W is a boron atom or a phosphorus atom, m, p, and x each independently represent a number between 1 and 15 inclusive, n is a number between 0 and 15 inclusive, and q is 3 or 5). Formula (4): (Li)m(B)p(O)n(OR)y(OWFq)x (in the formula, W is a boron atom or a phosphorus atom, n is a number between 0 and 15 inclusive, p, m, x, and y eachindependently represent a number between 1 and 12 inclusive, q is 3 or 5, R is hydrogen, an alkyl group, an alkenyl group, an aryl group, a carbonyl group, a sulfonyl group, or a silyl group, and these groups may have a fluorine atom, an oxygen atom, and other substituent groups). Formula (5): (Li)m(O)n(B)p(OOC-(A)z-COO)y(OWFq)x (in the formula, W is a boron atom or a phosphorus atom, A is a grouphaving six carbon atoms and may be an alkylene group, an alkenylene group, an alkynylene group, a phenylene group, or an alkylene group having an oxygen atom or a sulfur atom in the main chain thereof, m, p, x, and y each independently represent a number between 1 and 20 inclusive, n is a number between 0 and 20 inclusive, n is a number between 0 and 15 inclusive, z is 0 or 1, and q is 3 or 5).

A process for preparing a mesoporous metal oxide, i.e., transition metal oxide, Lanthanide metal oxide, a post-transition metal oxide and metalloid oxide. The process comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to form the mesoporous metal oxide. A mesoporous metal oxide prepared by the above process. A method of controlling nano-sized wall crystallinity and mesoporosity in mesoporous metal oxides. The method comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to control nano-sized wall crystallinity and mesoporosity in the mesoporous metal oxides. Mesoporous metal oxides and a method of tuning structural properties of mesoporous metal oxides.

A hybrid porous material including at least a first and a second porous material portion which are chemically bonded to each other and are each a different type of material.

There are provided an yttrium oxide composition having particle size of 25 nm or less, a method of preparing the same and a method of forming an yttrium oxide layer using the same. The yttrium oxide composition is prepared by dissolving an yttrium salt into a solvent to prepare an yttrium salt solution, and adding a basic compound to the yttrium salt solution to adjust a pH value to a range of 3.7 to 7. The yttrium oxide composition can form an yttrium oxide layer having improved properties since the composition has particle size of 25 nm or less and uniform particle distribution.

The present invention provides a Li3V2(PO4)3-based positive active material for a lithium secondary battery, which has high discharge capacity and excellent storage performance, particularly high-temperature storage performance; and a lithium secondary battery made using the positive active material. The positive active material for a lithium secondary battery has general formula Li3V2(PO4)3−x(BO3)x (0<x≦2−2). It is preferable that x be 2−7≦x≦2−3. Also provided are a positive electrode for a lithium secondary battery containing the positive active material; and a lithium secondary battery including the positive electrode.

Disclosed are: a Li3V2(PO4)3-type positive electrode active material for a lithium secondary battery, which has high discharge capacity and excellent storage performance, particularly excellent storage performance at higher temperatures; and a lithium secondary battery utilizing the positive electrode active material. Specifically disclosed are: a positive electrode active material for a lithium secondary battery, which is characterized by being represented by general formula Li3V2(PO4)3-x(BO3)x (wherein x is more than 0 and not more than 2-2, preferably falls within the range from 2-7 to 2-3 inclusive); a positive electrode for a lithium secondary battery, which comprises the positive electrode active material; and a lithium secondary battery equipped with the positive electrode.

A process for preparing a mesoporous metal oxide, i.e., transition metal oxide. Lanthanide metal oxide, a post-transition metal oxide and metalloid oxide. The process comprises providing an acidic mixture comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the acidic mixture at a temperature and for a period of time sufficient to form the mesoporous metal oxide. A mesoporous metal oxide prepared by the above process. A method of controlling nano-sized wall crystallinity and mesoporosity in mesoporous metal oxides. The method comprises providing an acidic mixture comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the acidic mixture at a temperature and for a period of time sufficient to control nano-sized wall crystallinity and mesoporosity in the mesoporous metal oxides. Mesoporous metal oxides and a method of tuning structural properties of mesoporous metal oxides.

The invention provides a boron suboxide composite material comprising boron suboxide and a secondary phase, wherein the secondary phase contains a metal selected from the group of gold, silver and copper and alloys based on or containing one or more of these metals. Moreover, the metal or alloy is present in the material in an amount of less than about 20 volume %, and preferably less than about 6 volume %.

The present invention is generally directed to a novel, economic synthesis of oxide ceramic composites. Methods of the present invention, referred to as carbon combustion synthesis of oxides (CCSO), are a modification of self-propagating high-temperature synthesis (SHS) methods in which the heat needed for the synthesis is generated by combustion of carbon in oxygen rather than that of a pure metal. This enables a more economic production of the ceramic material and minimizes the presence of intermediate metal oxides in the product. The reactant mixture generally comprises at least one oxide precursor (e.g., a metal or non metal oxide, or super oxide, or nitride, or carbonate, or chloride, or oxalate, or halides) as a reactant, but no pure metal. Pure carbon in the form of graphite or soot is added to the reactant mixture to generate the desired heat (upon ignition). The mixture is placed in a reactor and exposed to gaseous oxygen. The high-temperature exothermic reaction between the carbon and oxygen generates a self-sustaining reaction in the form of a propagating temperature wave that causes a reaction among the reactants. The reaction proceeds rapidly following ignition, and the final product comprises simple and / or complex oxides of elements present in the oxide precursor(s). CCSO also enables synthesis of oxides that cannot be produced by conventional SHS, such as when the pure metal is pyrophoric (such as Li or La) or such as when it melts at room temperature (e.g., Ga) or such as the combustion heat of the metal is relatively low.

A method for preparing a boron fertilizer, including: (1) heating boric acid to a temperature of 180-200° C., maintaining the temperature for 20-30 min for dehydration of the boric acid to yield pyroboric acid; and (2) cooling down the pyroboric acid to a temperature of 40-60° C., crushing, and screening to yield a powdered, weakly acidic, high-content boron fertilizer. The method is energy-saving, environmentally friendly, and low in cost. The resulting boron fertilizer is weakly acidic, fast in dissolution rate, and has excellent in compounding performance

The invention relates to Al2O3-B2O3-SiO2 composite sol, a core-shell structure activated carbon fiber and a preparation method thereof, belongs to the technical field of activated carbon fibers, and solves the technical problem of low intrinsic strength of activated carbon fibers in the prior art. The preparation method of the core-shell structure activated carbon fiber comprises the following steps: 1, carrying out surface modification on a regenerated cellulose fiber by utilizing maleic anhydride to obtain modified regenerated cellulose fiber; 2, carrying out surface modification treatment on the modified regenerated cellulose fiber by using Al2O3-B2O3-SiO2 composite sol, and further carrying out gel curing on the obtained modification layer; and 3, carbonizing and activating the modified regenerated cellulose fiber to obtain the core-shell structure activated carbon fiber with a Al2O3-B2O3-SiO2 composite oxide modification layer. The core-shell structure activated carbon fiber provided by the invention can greatly improve the strength, flexibility and weavability of a product.