95 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 lithium-site doped and metal oxide-coated lithium ion battery positive electrode material and a preparation method thereof. The lithium ion battery positive electrode material has the chemical formula of Li(m-x)MexMaNbCcO2.yTO2, wherein Me refers to doped alkali metal or an alkaline-earth metal element; TiO2 refers to the coated metal oxide. The lithium-site doped and metal oxide coated lithium ion battery positive electrode material has the advantages that the coating metal oxide can be used for preventing the large-area contact of the lithium ion battery positive electrode material and electrolyte, and inhibiting the reaction between the battery positive electrode material with the high reaction property and electrolyte, so that the cyclic stability of the battery material can be improved greatly; the laminar structure of the lithium ion battery positive electrode material can be perfected by adopting coating, so that the electrochemical performance is also improved; partial lithium atoms in the battery positive electrode material can be replaced with alkali metal or alkaline-earth metal ions by adopting doping, so that a metal oxide layer is strutted, embedding and de-embedding of the lithium ion are facilitated, the high-current discharge performance of the material is improved, and the use of the rare element lithium is reduced.

The invention provides a battery separator comprising a porous resin film and a crosslinked polymer supported thereon and having iminodiacetic acid groups in side chains of the polymer chains. The iminodiacetic acid group is preferably represented by the formula

wherein M¹ and M² are each independently a hydrogen atom, a lithium atom, a potassium atom, a sodium atom, or triethylamine. It is preferred that the layer of the crosslinked polymer is substantially nonporous or solid, and ion conductive, and that the crosslinked polymer has in the molecule oxetanyl groups which are capable of cation polymerization.

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.

Being as composite material with a nucleocapsid structure, the disclosed core material is in laminated structure of composite metal oxide granules containing lithium, and carbon layer as shell covers granule. Structural features of the composite metal oxide material are that oxygen atom layer, lithium atom layer, oxygen atom layer, metal layer and oxygen atom layer are arranged alternately in sequence in direction perpendicular to c axis in crystal structure. The composite metal improves surface electron conductance and electric contact so as to raise charging and discharging specific capacity and magnification performance. Features are: high charging and discharging efficiency, improved cycle performances, low cost and no pollution, high energy density of lithium cell of using the composite material as material for positive pole, safety, and applicable to multiform occasion.

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 discloses a preparation method of a layered lithium-enriched manganese-based material Li1.2Ni0.13Co0.13Mn0.54O2, and belongs to the field of lithium ion battery electrode materials. The preparation method is a kilogram-grade engineering chain method, and one reaction kettle can prepare a kilogram-grade lithium-enriched manganese positive electrode material precursor at one time. The method comprises the following steps: taking cheap weak acid sodium salt as a precipitator, adjusting the pH by industrial grade alkaline hydroxide, providing Ni, Co and Mn lithium-intercalated matrixes by a transition metal salt solution and preparing a precursor [Ni0.13Co0.13Mn0.54]CO2 by a coprecipitation method, wherein the ratio of the precursor [Ni0.13Co0.13Mn0.54]CO2 to a lithium source according to the quantity of the substances is that M:Li is equal to 1:(1.2-1.5), M is the sum of the quantity of the substances such as Ni, Co and Mn, and the lithium atoms are 3 to 8 percent excessively; and after performing planetary ball milling and mixing, performing solid-phase reaction at high temperature of 750 to 950 DEG C for 12 to 18 hours to prepare the layered lithium-enriched manganese-based material Li1.2Ni0.13Co0.13Mn0.54O2 with high capacity and long life. The Li1.2Ni0.13Co0.13Mn0.54O2 material prepared by the method can solve the problem that the existing layered lithium-enriched material has low cycle performance.

The invention discloses a preparation method of a lithium iron phosphate-lithium vanadium phosphate flaky composite cathode material. The preparation method comprises the following steps that 1, a vanadium source, an iron source, a phosphorus source, a lithium source and an organic carbon source are dissolved into deionized water according to the molar ratio 2:1:4:4:(3-5) of vanadium atoms to iron atoms to phosphorus atoms to lithium atoms to carbon atoms, a surfactant is added, the pH value is regulated, and stirring is conducted; 2, the mixture is transferred into a high-pressure reaction kettle, protective gas is introduced, reacting is conducted for 10 h to 30 h at the speed of 200 rpm to 1,200 rpm at the temperature of 200 DEG C to 300 DEG C, and after washing, filtering and drying are conducted, grinding is conducted; 3, roasting is conducted in a non-oxidative atmosphere at the temperature of 600 DEG C to 800 DEG C, and then the material is obtained. The lithium iron phosphate-lithium vanadium phosphate flaky composite cathode material synthesized through the method has the excellent electronic conductivity and ionic conductivity and is excellent in electrochemical performance, good and stable in product homogeneity and low in cost.

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.

A lithiated metal phosphate material is doped by a portion of the lithium atoms which are present at the M2 sites of the material. The doped material has the general formula: Li_1+xM_1−x−dD_dPO₄. In the formula, M is a divalent ion of one or more of Fe, Mn, Co and Ni. D is a divalent metal ion which is one or more of Mg, Ca, Zn, and Ti. It is present in an amount represented by the subscript d which has a value ranging from 0 to 0.1. The portion of the lithium which is present at the M2 octahedral sites of the material is represented by the subscript x and is greater than 0 and no more than 0.07. Also disclosed are electrodes which incorporate the material as well as batteries, including lithium ion batteries, which include cathodes fabricated from the doped, lithiated metal phosphate materials.

A non-aqueous electrolyte for an electric current producing electrochemical cell is provided comprising an ionically conductive salt and an additional ionically conducting salt in a non-aqueous medium, the additional ionically conducting salt corresponding to the formula M⁺(Z*(J*)j)⁻, wherein: M is a lithium atom, Z* is an anion group containing two or more Lewis basic sites and comprising less than 50 atoms not including hydrogen atoms, J* independently each occurrence is a Lewis acid coordinated to at least one Lewis basic site of Z*, and optionally two or more such J* groups may be joined together in a moiety having multiple Lewis acidic functionality, and j is an integer from 2 to 12. The addition of these ionically conducting salts to electrolyte solutions containing LiPF₆ (and/or other lithium compounds) improves the stability of the electrolyte solution.

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.

A non-aqueous electrolyte solution for secondary batteries, comprising a lithium salt (total number of moles of lithium atoms: N_Li) and a liquid composition, wherein the liquid composition comprises a specific fluorinated solvent (α) and a cyclic carboxylic acid ester compound (total number of moles: N_A), and may contain a specific compound (β) (total number of moles: N_B), the content of the fluorinated solvent (α) is from 40 to 80 mass %, N_A/N_Li is from 1.5 to 7.0, and (N_A+N_B)/N_Li is from 3 to 7.0; and, a lithium ion secondary battery employing such a non-aqueous electrolyte solution for secondary batteries.

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.