125results about "Silicon oxides" patented technology

The invention relates to the technical field of lithium battery material production, in particular to a lithium ion battery silicon-oxygen negative electrode material preparation system and method.The lithium ion battery silicon-oxygen negative electrode material preparation system comprises a transversely-arranged furnace body, the furnace body is internally provided with a preheating area and a high-temperature area, and the lithium ion battery silicon-oxygen negative electrode material preparation system further comprises a two-way conveying part, a driving assembly and a gas guide assembly; the driving assembly is arranged on the furnace body and connected with the two-way conveying piece. Through the arrangement of the two-way conveying part, the driving assembly and the air guide assembly, carrier particles can be preheated before entering a high-temperature area, and the situation that tiny cracks are generated due to the fact that thermal stress on the surfaces of the carrier particles is too large due to sudden temperature difference when the carrier particles enter the high-temperature area is avoided; and meanwhile, the carrier particles can be continuously subjected to'climbing-sliding-re-climbing 'movement in the rotating process of the two-way conveying part, so that full contact between the carrier particles and the reaction gas is ensured, and dual guarantee on the endurance performance of the lithium battery is realized.

An electrode for a lithium metal battery according to an embodiment of the present invention comprises a lithium metal storage layer containing silicon oxide particles. The silicon oxide particles have a porous structure, and the molar ratio of oxygen to silicon contained in the silicon oxide particles is 1.5 or more and less than 2.0. A lithium metal battery according to an embodiment of the present invention includes an electrode for a lithium metal battery according to the above embodiment.

The present application relates to the technical field of copper clad laminates, and discloses a copper clad laminate, a resin composition for the copper clad laminate, and spherical silicon and a preparation method therefor. The spherical silicon of the present application is composed of spherical silicon dioxide and zinc molybdate particles dispersedly grown on the surface of the spherical silicon dioxide in situ and has a diameter of less than 10 microns and a D50 of 0.6-6 microns. The content of zinc molybdate per unit area on the surface of the spherical silicon dioxide is 0.03-1 g / m2, and the size of the zinc molybdate particles is less than or equal to 400 nm. The preparation method comprises: enabling spherical silicon dioxide to come into contact with / be mixed with a soluble molybdate and a zinc salt in an aqueous reaction system; and reacting the soluble molybdate with the zinc salt in situ on the surface of the spherical silicon dioxide, so as to form spherical silicon chemically coated with zinc molybdate particles. In the present application, by directly synthesizing the zinc molybdate in situ on the surface of the spherical silicon dioxide by means of a hydrothermal method, the structural morphology of the obtained spherical silicon and the size of the zinc molybdate particles can be effectively controlled, thereby ensuring that the wear of a drill bit during the drilling of the copper clad laminate is effectively mitigated.

A rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes a rhombohedral zinc orthosilicate (Zn2SiO4) phase, a cubic zinc ferrite (ZnFe2O4) phase, and a hexagonal silicon dioxide (SiO2) phase. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material exhibits a morphology including spherical microscale particles with an average diameter ranging from 0.8 micrometer (μm) to 1.8 μm and irregular nanoscale aggregates with an average diameter ranging from 50 nanometer (nm) to 110 nm. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material has an adsorption capacity for basic fuchsin dye of greater than or equal to 140 milligrams per gram (mg / g). Furthermore, a method for producing the rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes calcination of metal precursors.

The present invention relates to a method of preparing a negative electrode active material for a lithium secondary battery, which includes a first step of forming a silicon dispersion by dispersing silicon-based particles in a solvent; a second step of adding an iron salt and tannic acid to the silicon dispersion and stirring to form a reaction layer of the iron salt and the tannic acid on surfaces of the silicon-based particles; a third step of heat treating the reaction layer of the iron salt and the tannic acid to form an amorphous carbon coating layer; and a fourth step of acid treating the amorphous carbon coating layer to form a porous amorphous carbon coating layer, and a negative electrode active material prepared thereby.

To provide: a negative electrode capable of significantly increasing capacity while maintaining battery characteristics; and a method for manufacturing such negative electrode.SOLUTION: A negative electrode includes: a negative electrode current collector having a roughened surface; and a negative electrode active material provided on the negative electrode current collector. The negative electrode active material comprises negative electrode active material particles including a compound of lithium, silicon, and oxygen. The negative electrode active material particles can be represented by SiOxLiy, and a value of x is 0.8 or more and 1.2 or less, and a value of y is 0.5 or more and 3.4 or less. The negative electrode active material has a multilayer structure composed of two or more layers. In Si2p bond energy obtained by X-ray photoelectron spectroscopy analysis of a layer interior in each layer of the negative electrode active material having the multilayer structure, intensity of a peak A acquired in the vicinity of 98 eV and intensity of a peak B acquired in the vicinity of 100.5 eV have a relation (intensity of peak A)≥(intensity of peak B).SELECTED DRAWING: Figure 1

The present invention relates to a negative electrode active material, a negative electrode including the same, a secondary battery including the same and a method for preparing the negative electrode active material.

The present invention relates to the field of negative electrode materials and provides a negative electrode material, a manufacturing method thereof, and a battery. The negative electrode material includes a silicon-based active material and a lithium silicate, and further includes Mg, Al, and P, wherein the mass content of Mg in the negative electrode material is a%, the mass content of Al in the negative electrode material is b%, and the mass content of P in the negative electrode material is c%, and a, b, and c in the negative electrode material satisfy the relationship 0.3≦(a+b) / c≦1.5 and 0.5≦a+b+c≦10. The introduction of Mg, Al, and P into the negative electrode material provided by the present invention is beneficial to the formation of lithium ion transmission channels and can improve the rate performance of the negative electrode material.

Provided are a negative electrode active material which includes negative electrode active material particles which includes a silicon oxide (SiOx, 0<x≤2); and at least one lithium silicate selected from Li2SiO3, Li2Si2O5, and Li4SiO4 in at least a part of the silicon oxide. A signal generated in a region of 200 to 600 cm−1 according to a Raman spectrum is subjected to deconvolution into three peaks, which are set to peak A, peak B, and peak C from lowest to highest of an absolute value of a wavenumber. Also disclosed are a method of preparing the same, and a negative electrode and a lithium secondary battery including the negative electrode active material.

The present application relates to a negative electrode active material, a method for preparing the same, a negative electrode composition, a negative electrode for a lithium secondary battery comprising the negative electrode composition, and a lithium secondary battery comprising the negative electrode. According to the present invention, a crystalline surface is etched by surface-etching a pulverized silicon-based active material itself via an alkaline solution treatment, so that lithium ion mobility can be controlled, and specific surface areas of a 111 plane and a 220 plane in the silicon-based active material can be adjusted in response to a change in etching conditions, thus, the lithium intercalation / deintercalation reaction is uniform, and the stress on the silicon-based active material is reduced.

The invention discloses a grain size controllable negative electrode and a preparation method thereof, and belongs to the technical field of secondary battery materials. The preparation method comprises the following steps: weighing raw materials according to a molar ratio of a lithium source to SiOx of 0.1-0.7, adding 5-10wt% of a carbon source (naphthalene), and uniformly mixing; and heating the mixed material to 600-800 DEG C at the speed of 1-10 DEG C / min in an inert gas atmosphere, and keeping the temperature for 2-10 hours to obtain the negative electrode material. Through in-situ carbon coating, the growth of silicon and lithium metasilicate grains is inhibited by using the high-temperature heat absorption characteristic of naphthalene, and meanwhile, the conductivity can be improved by an amorphous carbon layer formed by naphthalene carbonization; in the prepared negative electrode material, the grain size of silicon is 8-13nm, the grain size of lithium metasilicate is 9-20nm, the proportion of lithium metasilicate in the total lithium silicate is greater than or equal to 94%, and the capacity retention rate can reach 77.1-90.4% after 100 cycles at 0.5 C multiplying power. The preparation method is simple in process and suitable for industrialization, and the cycle performance and the first coulombic efficiency of the silicon-oxygen negative electrode can be remarkably improved.

Provided herein are methods, systems, and kits for generating a self-assembled monolayer of beads adjacent to (e.g., on or across) a substrate. The methods, systems, and kits provided herein may comprise contacting a substrate with a plurality of beads, which may comprise nucleic acid molecules coupled thereto, and providing conditions sufficient for the plurality of beads to self-assemble adjacent to the substrate. Sequencing of the nucleic acid molecules may be performed

The present application relates to a negative electrode active material, a method for producing a negative electrode active material, a negative electrode composition, a negative electrode for a lithium secondary battery including the same, and a lithium secondary battery including the negative electrode.

This invention discloses a low-resistivity silicon suboxide lithium-ion battery anode material and its preparation method. Fluorinated silicon suboxide is mixed with a carbon precursor and a solvent, ground until dry, and the solvent is removed to obtain an intermediate material. The intermediate material is then calcined in a protective gas atmosphere using gradient heating and / or gradient pressurization to obtain the anode material. This invention constructs a fluorine gradient hole structure, which preferentially transforms into a stable LiF-rich solid electrolyte interphase (SEI) film during electrochemical cycling, significantly reducing the lithium-ion diffusion barrier and interfacial charge transfer impedance. The gradient heating and / or pressurization sintering process carbonizes the carbon precursor in situ on the surface of the fluorinated layer, forming a dense and robust coating layer. This coating layer forms a strong interfacial bond through vacancy bonding and mechanical interlocking, buffering volume expansion. The anode material obtained using this invention exhibits excellent electrochemical performance and significantly reduces impedance.

A preparation method and use of a novel pure inorganic solid silicon-based sulfonic acid and / or phosphoric acid catalytic material are disclosed. The surface hydroxyl-rich metasilicic acid is used as the raw material, and by using a sulfonating reagent and / or phosphoric acid, the sulfonic acid group and / or the phosphoric acid group are bonded to the inorganic silicon material by chemical bonding to obtain a pure inorganic solid silicon-based sulfonic acid and / or phosphoric acid catalytic material. The catalytic material can be widely used in many acid-catalyzed organic reactions such as isomerization, esterification, alkylation, hydroamination of olefins, condensation, nitration, etherification, multi-component reactions and oxidation reactions. The inorganic solid silicon-based sulfonic acid and / or phosphoric acid catalytic material of the present invention has the advantages of high acid amount, high activity, good hydrothermal stability, no swelling, simple preparation, low cost, no pollution, no corrosion, easy separation and reusability.

The present invention improves at least one of initial efficiency, battery capacity, and cycle characteristics of a non-aqueous electrolyte secondary battery. A negative electrode active material for a non-aqueous electrolyte secondary battery according to one embodiment of the present invention contains porous composite particles containing silicon and a silicon oxide (SiOx, 0 < x < = 2), in which some or all of pores of the porous composite particles are filled with carbon, and some or all of surfaces of the porous composite particles are coated with carbon.

The present invention relates to a carbon-silicon-silicon / carbon composite comprising: a carbon-silicon composite including silicon disposed inside pores of a porous carbon support; and a silicon / carbon composite matrix disposed on the surface of the carbon-silicon composite, and a manufacturing method therefor. According to the present invention, the overall silicon size can be suppressed to be small, and the formation of Crystal-LixSiy (for example, Li15Si4 or Li3.75Si), which is an intermediate phase affecting the deterioration of battery performance, is suppressed, thereby mitigating the deterioration of battery performance during repeated charge–discharge cycles.

This invention discloses a high-capacity nitrogen-doped porous silicon-oxygen-carbon anode material, its preparation method, and its application. The anode material comprises nitrogen-doped carbon material and biomass porous silicon-oxygen material, with the nitrogen-doped carbon material coating the biomass porous silicon-oxygen material. The nitrogen content in the anode material is ≥13 at%. This invention utilizes the crosslinking of amino acid materials with the Si-OH groups on the surface of the biomass porous silicon-oxygen material. Carbonization promotes the polymerization-cyclization-condensation of the amino acid materials to form a high-content nitrogen-doped carbon material that uniformly coats the biomass porous silicon-oxygen material. By optimizing the surface structure of the biomass porous silicon-oxygen material, the polymerization of amino acid materials or pyrolysis products with the biomass porous silicon-oxygen material is promoted, preparing a nitrogen-doped silicon-oxygen-carbon material rich in pores. By optimizing the lithiophilicity of the biomass porous silicon-oxygen material, the prepared nitrogen-doped biomass porous silicon-oxygen-carbon material exhibits excellent electrochemical performance and cycle stability.

The application belongs to the field of lithium battery manufacturing, and provides a negative electrode material for lithium battery and application thereof, which comprises a graphite negative electrode material, a modified silicon-oxygen negative electrode material, and an active composite material obtained by compounding the two in different proportions. x The mechanical strength of the modified silicon-oxygen negative electrode material (TiO2 / SiO x particles) is significantly improved, the stress caused by volume change of the silicon-based negative electrode material in the charging and discharging process is effectively relieved, the volume expansion of the silicon-based material is effectively inhibited, the structure stability of the negative electrode material in the cycle process is maintained, the interface stability is good, and the cycle stability of the battery is further improved.

The present application relates to a negative electrode active material, a method for preparing the negative electrode active material, a negative electrode composition, a negative electrode for a lithium secondary battery including the same, and a lithium secondary battery including the negative electrode.

The present invention provides a negative electrode active material for a lithium secondary battery, the negative electrode active material for a lithium secondary battery comprising silicon oxide (SiO x ,0

One embodiment of the present invention provides an anode active material for a secondary battery, the anode active material comprising silicon-based composite particles in which a plurality of silicon particles, amorphous carbon, and lithium silicate are aggregated, wherein the silicon-based composite particles have a concentration ratio of lithium silicate at a surface portion to lithium silicate at a central portion of greater than 1, and the lithium silicate has a weight ratio (L1 / L2) of Li2Si2O5(L1) to Li2SiO3(L2) of 0.1 or more.

The present application relates to a negative electrode active material, a method for preparing a negative electrode active material, a negative electrode composition, a negative electrode comprising same for a lithium secondary battery, and a lithium secondary battery comprising the negative electrode, the negative electrode active material comprising a silicon-based active material, which is a mixture of silicon-based particles and a binder, wherein the silicon-based particles have a grain size of 100 nm or less, the particle size (D50) of the silicon-based active material is 1 to 20 µm, and the binder is contained in a content of 1 to 15 parts by weight relative to 100 parts by weight of the silicon-based active material.

The present invention relates to an anode active material comprising silicon-based oxide particles, the silicon-based oxide particles containing Li, and a first coating layer and a second coating layer provided on the surfaces of the silicon-based oxide particles, the first coating layer and the second coating layer being carbon layers, and either no irreversible substance formed by silicon-based oxide and Li is contained between the first coating layer and the second coating layer, or LiOH and Li2CO3 are contained in an amount of less than 1 wt % each, based on 100 wt % of the total anode active material, anodes comprising the same, secondary batteries comprising the anodes, and methods for producing the anode active material.

An electrode material for a lithium ion secondary battery and a method for forming the same, the electrode material including composite particles, each composite particle including: primary particles including thermally disassociated silicon oxide; and a sheath provided on a surface of the primary particles. The sheath includes a turbostratic carbon having a Raman spectrum with: a D band having a peak intensity (I D ) at a wave number between 1330 cm ‑1 and 1360 cm ‑1 ; a G band having a peak intensity (I G ) at a wave number between 1530 cm ‑1 and 1600 cm ‑1 ; and a 2D band having a peak intensity (I 2D ) at a wave number between 2650 cm ‑1 and 2750 cm ‑1 , wherein: a ratio of I D / I G is in a range of greater than zero to about 1.0; and a ratio of I 2D / I G is in a range of about 0.4 to about 2.

To provide a method for preparing an improved silicon-based anode material and such a silicon-based anode material.SOLUTION: A method of making a porous reduced silica material comprising forming a precursor fiber comprising silica, and magnesiothermically reducing the precursor fiber to form the porous reduced silica material, wherein the porous reduced silica material has a diameter of 0.1 to 20 microns, a surface area of 5m2 / g to 400m2 / g, and a porosity of 0.001 cm 3 / g to 1.5cm3 / g, and comprises greater than 20 weight percent silicon.SELECTED DRAWING: Figure 1

The present invention relates to an anode active material, a preparation method therefor and a lithium secondary battery comprising same, the anode active material comprising at least one metal-containing particle, wherein the ratio (r2 / r1) of the radius (r1) of the anode active material to the length (r2) of the longest linear line for connecting a center point of the anode active material and a distal end of the center point of the anode active material of the metal-containing particle positioned at the farthest distance is 0.8-0.95.

The present application relates to an anode material, and an electrochemical device and an electronic device including the anode material. The anode material includes a silicon composite substrate. In the X-ray diffraction pattern of the anode material, the highest intensity at 2θ within the range of 28.0° to 29.0° is I2, and the highest intensity at 20 within the range of 20.5° to 21.5° is I1, wherein 0<I2 / I1≤1. The anode material of the present application has good cycle performance, and the battery prepared with the anode material has better rate performance and a lower swelling rate.