62 results about "Lithium zirconate" patented technology

The invention provides a titanium composite, which comprises lithium-titanium composite oxide and a lithium compound, wherein the lithium compound comprises the lithium-titanium compound oxide; and the lithium compound is at least one of lithium zirconate, lithium vanadate, lithium metasilicate, lithium metamanganate, lithium carbonate, lithium phosphate, lithium aluminate, lithium hydrogenphosphate, lithium hydroxide, lithium chlorate, lithium sulfate, lithium molybdate, lithium chloride, lithium borate, lithium citrate, lithium tartrate, lithium acetate and lithium oxalate. The composite can realize the high-rate and quick charge and discharge of a battery, improve the recycling performance and high temperature storage performance of materials and in particular improve the equality safety of batteries using high-performance titanium materials. The invention also provides a preparation method for the material, which is simple, easy to operate, high in yield and suitable for massive production. The composite of the invention has a wide application range, can be used alone or in combination with other electrode active materials as a cathode active material of various lithium ion batteries or an electrode material of capacitors.

Disclosed is a positive electrode active material for a nonaqueous electrolyte secondary battery having at least a lithium-transition metal composite oxide of a layer structure, in which an existence ratio of at least one selected from the group consisting of elements which may become tetravalent and magnesium is 20% or more on a surface of the lithium-transition metal composite oxide. By use of this positive electrode active material, a nonaqueous electrolyte secondary battery having excellent battery characteristics, specifically, having excellent high rate characteristics, cycle characteristics, low-temperature characteristics, thermal stability, and the like, under the even more harsh environment for use can be realized.

The invention discloses a preparation method of a fast ion conductor and conducting polymer dual-modified ternary cathode material for a lithium-ion battery. According to the material, a ternary cathode material for a lithium-ion battery is taken as a core, a fast ion conductor is taken as a first coating layer, a conducting polymer is taken as a second coating layer and the fast ion conductor isany one of lithium vanadate, lithium metaaluminate and lithium zirconate. The fast ion conductor and the ternary cathode material are firstly mixed evenly and ground; the ternary cathode material is coated with the fast ion conductor by using a high-temperature solid state method; the conducting polymer and the ternary cathode material coated with the fast ion conductor are mixed evenly and milled; and the ternary cathode material coated with the fast ion conductor is coated with the conducting polymer to finally obtain the fast ion conductor and conducting polymer dual-modified ternary cathode material for the lithium-ion battery. The fast ion conductor is combined with the conducting polymer to modify the ternary cathode material, so that the ternary cathode material has excellent cycleperformance and good rate capability.

The invention relates to a solid electrolyte and a preparation method thereof. The solid electrolyte is formed by monoclinic phase lithium zirconate crystal admixed with M element, and the monoclinic phase lithium zirconate crystal admixed with the M element is that M ions are admixed to lithium niobate crystal and the composition of the chemical formula is Li6+yZr2-xMxO7, wherein X is equal to 0.01-0.4, and M is a positive divalent metal element or a positive trivalent metal element; when M is the positive divalent metal element positive, and Y is equal to 2x; and when the M is the positive trivalent metal element, and y is equal to x. The method comprises steps for preparing the monoclinic phase lithium zirconate crystal admixed with the M element by adopting a high-temperature solid-phase method and dry-pressure sintering, and has the advantages of high production efficiency and high yield and purity; the safety problem of a lithium-ion battery is solved thoroughly because of no use of any liquid organic solvent; and the prepared solid electrolyte has high ionic conductivity, excellent electrochemical stability, and a very wide application prospect.

The invention discloses a method for preparing zirconium hydride, and relates to the technology field of metal smelting. The method includes mixing zirconium material containing zirconia, calcium zirconate or lithium zirconate with the magnesium metal under a calcium or lithium-contained condition; placing into a sealed container, introducing hydrogen and heating to carry out the hydrogenation toconvert the zirconium in the reaction material into the zirconium hydride; and removing impurities by using acid to obtain the zirconium hydride. Compared with the prior art, the method has the advantages of greatly reduced comprehensive energy consumption, and process cost reduced by more than 20%, and is applicable for industrial production.