7 results about "Lithium molybdate" patented technology

The invention discloses a high-initial-efficiency fast-charge graphite composite material and a preparation method thereof, the composite material is of a core-shell structure, the core is graphite, and the shell is lithium sulfonate / lithium molybdate and an amorphous carbon coating layer thereof; the mass ratio of the shell is 5-15 wt% according to the mass ratio of the composite material being 100%. The preparation method comprises the following steps: adding a molybdenum compound into a solvent to prepare a solution, adding graphite oxide, an inorganic lithium salt and a carbon nanotube conductive solution, reacting for 2-12 hours at the temperature of 50-120 DEG C, filtering, carbonizing filter residues to obtain a lithium molybdate conductive agent coated graphite material, and depositing a lithium sulfonate derivative on the surface of the lithium molybdate conductive agent coated graphite material by an atomization method to obtain the lithium molybdate conductive agent coated graphite material. The electron and ion conductivity of the material can be improved, and the rate and the first efficiency of the material can be improved.

The invention provides a high-temperature-resistant far infrared radiation ceramic coating, a ceramic coating and a preparation method, and relates to the technical field of surface engineering. The high-temperature-resistant far infrared radiation ceramic coating disclosed by the invention is prepared from the following raw materials in parts by weight: 12 to 22 parts of lutetium pyrotantalate; 10 to 16 parts of hafnium boride; 8-14 parts of nitrogen aluminum titanium; 9 to 15 parts of gadolinium zirconate; 4 to 7 parts of molybdenum disilicide; 2 to 5 parts of samarium hexaboride; 6 to 11 parts of pyrochlore type zirconium tungstate; 1 to 2.5 parts of a sintering aid; 0.5 to 1.5 parts of carbon nano onion; 3 to 6 parts of bismuth vanadate; 5 to 9 parts of phosphotungstic acid; and 1-3 parts of lithium molybdate. According to the high-temperature-resistant far infrared radiation ceramic coating disclosed by the invention, various rare earth compounds and refractory metal compounds are introduced to form a unique multi-phase composite system, and all the components generate a synergistic effect in an optimized interval, so that the thermal stability, thermal shock resistance and mechanical strength of the coating are remarkably improved; and finally, long-acting protection under extreme working conditions of high temperature, corrosion and abrasion of the water cooling wall of the boiler is realized.

The application discloses a kind of porous graphite, preparation method and application of silicon-carbon composite material, belong to battery material technical field.The preparation method is: metal, petroleum coke and its dopant are mixed uniformly, pre-carbonization, graphitization, obtain graphite material, then it is etched to pore by plasma technology, then activation, obtain porous graphite;Finally by silane cleavage method, pass in silane mixed gas and carry out nanometer silicon deposition, passivation, then the obtained material is added to the solution of lithium molybdate and lithium sulfonate and coated, spray drying, obtain double lithium compound coated silicon-carbon composite material.The obtained material utilizes the characteristics that porous graphite itself electronic conductivity is high, and the outer layer coated double lithium salt structure improves ionic conductivity and its first efficiency, and plays the synergistic effect between the two, reduces expansion, improves cycle performance.

A preparation method of a chelated lithium molybdate lubricant additive includes: adding kaolin and HDTMS into deionized water, performing magnetic stirring and ultrasonic treatment, then stirring to perform a reaction, and after the reaction is finished, filtering, washing and drying a reaction product to obtain alkylated kaolin; adding the alkylated kaolin and APTMS into deionized water, performing magnetic stirring and ultrasonic treatment, then stirring to perform a reaction, and after the reaction is finished, centrifuging, washing and drying a reaction product to obtain amino / alkylated kaolin; adding the amino / alkylated kaolin into a chelated lithium molybdate ionic liquid, stirring for a reaction, and after the reaction is finished, filtering, washing and drying a reaction product to obtain the chelated lithium molybdate lubricant additive. The prepared lubricant additive has good dispersibility in base oil, and performs well in friction reduction and anti-wear.

The application discloses a lithium molybdate-chromate monocrystal, a preparation method thereof and an optical filter, and belongs to the technical field of optical materials. x Mo 1‑x O4, wherein 0.005<=x<=0.5, the lithium molybdate-chromate monocrystal is of a trigonal system, a space group is R, is of a cut-off absorption below a wavelength of 500 nm, has a high transmittance from above 500 nm to an infrared wave band, and has a room-temperature thermal conductivity of 4 W.m ‑1 ·K ‑1 -1.K-1, and is suitable for manufacturing a 500 nm long-wave-pass optical filter with high stability and high reliability. The application introduces appropriate hexavalent chromium (Cr 6+ ) into a lithium molybdate matrix, and can move an absorption edge and form a required long-wave-pass characteristic by adjusting the content of hexavalent chromium; meanwhile, the high thermal conductivity and mechanical stability of the oxide crystal make it more suitable for high-power transmission and optical application in a harsh environment, and solve the problems of the existing thin film and polymer optical filter in thermal stability and high-power bearing.

A high capacity anode material comprising pre-lithiated α-MoO3 nanostructures is provided. A lithium sulfur full cell, battery, or pouch cell comprising the anode material and methods of fabricating the same are also provided.

The method for preparing adjustable-size lithium molybdate powder by reactive ball milling uses Li2MoO4 as the chemical formula, with a purity ≥99.5% and a particle size satisfying 0.1μm≤D50≤50μm. The powder is white and comprises six steps and conditions: batching, ball milling, sieving and drying, annealing, and pulverizing. This method offers advantages such as precise control of powder particle size, significantly reduced preparation time, simplified preparation process, and improved product yield.