96 results about "Lithium atom" patented technology

A polyester composition containing: a) aluminum atoms; and b) alkaline earth atoms or alkali metal atoms or alkali compound residues such as lithium atoms; and c) particles comprising titanium, zirconium, vanadium, niobium, hafnium, tantalum, chromium, tungsten, molybdenum, iron, or nickel atoms or combinations thereof, where the particles improve the reheat rate of the polyester composition. The polyester polymer compositions may also contain phosphorus catalyst deactivators/stabilizers. The polyester compositions and the articles made from the compositions such as bottle preforms and stretch blow molded bottles have improved reheat rate while maintaining low haze, high L*, a b* below 3, and have low levels of acetaldehyde. In the process for making the polyester polymer, the polymer melt is polycondensed in the presence of a) and b), with the particles c) added in a melt phase process or added to the polymer in an injection molding machine or extruder. The polyester polymer composition can be made to high IV from the melt phase while avoiding solid state polymerization.

There is provided a lithium polymer secondary cell in which reduction of the film thickness of a solid electrolyte can be realized. The lithium ion secondary cell consists essentially of a composite electrode as a positive electrode having a positive electrode layer, containing a mercaptide compound and a conductive material, carried on a collector; the hydrogen atom of at least one mercapto group in the mercaptide compound being substituted with a lithium atom; a polyelectrolyte; and a lithium negative electrode.

The invention discloses a composite metal lithium cathode with a lithium-carbon composite interface layer and a preparation method thereof and belongs to the technical field of secondary batteries. The outer surface of the carbon framework material of the composite metal lithium cathode is coated with the lithium-carbon composite interface layer, and the structure of the composite interface layeris a lithium-carbon intercalation structure formed by intercalating metal lithium atoms into the carbon skeleton material layer. The forming method comprises the following steps: pressing lithium metal into pores of the carbon framework material in a pressurizing mode, and forming a lithium-carbon composite interface layer, which is conductive and stable to lithium, on the surface of the carbon framework material after activation for a certain time due to the adsorption or intercalation effect. The preparation method is simple and feasible, and the generated lithium-carbon composite interfacelayer is very uniform in distribution and thickness in the carbon framework material. The interface layer can effectively improve the volume expansion problem of the lithium metal cathode in the circulation process and prolong the cycle life of the batteries.

To provide a non-aqueous electrolyte solution for secondary batteries, which has a long term flame retardancy and which is excellent in cycle properties particularly under high voltage conditions and in high rate charge/discharge properties, and a secondary battery using such a non-aqueous electrolyte solution for secondary batteries. A non-aqueous electrolyte solution for secondary batteries, comprising a lithium salt and a solvent for dissolving the electrolyte salt, which comprises a specific hydrofluoroether, a specific ether compound and a specific carbonate compound, wherein the ratio (N₀/N_Li) of the total number of moles (N₀) of etheric oxygen atoms derived from the above ether compound to the total number of moles (N_Li) of lithium atoms derived from the lithium salt, contained in the solvent for dissolving the electrolyte salt, is more than 1 and at most 6; and a secondary battery using such a non-aqueous electrolyte solution for secondary batteries.

A hydrogen storage structure includes a plurality of graphene sheets arranged to form a stack with a plurality of spacers between adjacent graphene sheets in the stack. In one embodiment, the spacers are arranged to provide a distance ranging between 5 Å and 20 Å between adjacent graphene sheets. In one embodiment, the spacers are formed as graphene spheres having a diameter that ranges from 5 Å to 15 Å. In another embodiment, the spacers are formed as graphene single-walled nanontubes having a length that ranges from 5 Å to 20 Å. In a further embodiment, the spacers are formed as graphene sheets having a thickness that ranges from 5 Å to 20 Å. In one embodiment, the plurality of graphene sheets is doped with lithium. In one embodiment, the lithium doping concentration is a ratio of one lithium atom per three carbon atoms.

The invention relates to a preparation method of positive active material hollow spherical lithium manganate of a lithium ion battery, and belongs to the technical field of a chemical battery. The method comprises the steps of uniformly mixing a manganese sulfate aqueous solution with a potassium persulfate aqueous solution, adding concentrated sulfuric acid, carrying out hydrothermal reaction, then centrifuging the mixed solution, taking out solid phase, and washing and drying the solid phase to obtain spinous hollow manganese dioxide spheres; mixing soluble lithium salt and the spinous hollow manganese dioxide spheres to obtain a mixture I, ultrasonically processing, drying and burning the mixture I to obtain hollow spherical lithium manganate. The prepared spherical lithium manganate belongs to a spinel type, the diameter of the spherical lithium manganate is 0.5 to 5 micrometers, the degree of crystallinity is good, the spherical lithium manganate is mainly formed by clustering and assembling spinous nanowires, a large clearance is formed between two adjacent nanowires, a porous structure is formed inside the spherical lithium manganate, the lithium atom density is reasonable, the activity is low, the chemical stability is high, adequate contact when the lithium salt is dissolved and the lithium manganate is synthesized in the later period can be facilitated, the insertion and separation of lithium ions can be facilitated, and the electrochemical cycling reversibility and stability of the lithium ion battery can be effectively improved.

The invention relates to a preparation method of a spherical lithium metatitanate solid tritium fertile material, which belongs to the technical field of nuclear fusion. The method comprises the following steps: preparing titanium dioxide balls, mixing an aqueous solution of soluble lithium salt and titanium dioxide balls for performing ultrasonic treatment, then reacting, centrifuging after completing the reaction, taking a solid phase for washing, and drying and calcining to obtain spherical lithium metatitanate. The preparation method has the advantages that a reactant ethanol can be recovered and repeatedly used, the preparation cost is low, the equipment requirement is simple, and the preparation period is short. The prepared spherical lithium metatitanate belongs to a monoclinic crystal type, the diameter is 200nm to 400nm, structure is uniform, the crystallization degree is good, a pore structure is formed in the inner part, the prepared spherical lithium metatitanate has reasonable lithium atom concentration, low activity and high chemical stability, and has good compatibility with a combination material, and the spherical lithium metatitanate has good thermal stress and fission strength due to complex geometry spherical morphology.

The invention relates to a low-chromium cast iron grinding ball and a casting method thereof. The low-chromium cast iron grinding ball contains carbon, silicon, manganese, chromium, nickel, molybdenum, copper, boron, lithium, sodium, rare-earth elements and essential impurity elements. The casting method comprises the following steps: preparing raw materials and an evaporative mold according to requirements, adding a simple substance sodium into the evaporative mold, and casting molten metal into the evaporative mold; and after the casting is cooled to 300-520 DEG C, taking out the casting, and carrying water quenching to finish the casting. The small-atom lithium and sodium are added, so that the sodium atoms and lithium atoms are diffused and filled in clearances of eutectic carbides or pores in the crystalline phase in the cast iron under high-temperature conditions, thereby greatly lowering the number of internal defects; and the boron powder and rare-earth elements can increase the quantity of the eutectic structures and enhance the dispersivity, so that the lithium atoms and sodium atoms can be filled and distributed in the whole structure, thereby enhancing the overall performance.

The invention provides a preparation method of lithium difluoro(oxalato)borate (Li[B(C2O4)F2], LiDFOB). The method effectively recycles the by-product LiBF4, and avoids the waste of lithium atoms while improving the yield. The method utilizes the solubility difference of materials to directly filter out the by-product, and is simple in operation. The crude product is subjected to crystallization directly to obtain high purity LiDFOB, thus avoiding the product loss brought about by repeated recrystallization. The method has the advantages of cheap and easily available materials, simple reactionsteps and mild reaction conditions, and is suitable for large-scale industrial production.