36 results about "Li element" patented technology

The invention relates to the technical field of batteries, in particular to a composite positive electrode material and a preparation method and application thereof. A composite positive electrode material comprises a positive electrode base material, the chemical formula of the positive electrode base material is LimNixCoyMnzQaRdO2, m is larger than or equal to 1 and smaller than or equal to 1.2, and xlt is larger than or equal to 0.5; 1, 0lt; yt; Yt; 0.5, Li comprises a primary Li element and a secondary Li element, Q is a primary doping element, 0 lt; a < = 0.5, R is a secondary doping element, and 0 < d < = 0.5; x + y + z + a + d = 1, and the doping depth h of the secondary doping element meets 0 lt; h is less than or equal to 850nm; and the particle sizes D10, D50 and D90 of the positive electrode base material meet the condition that (D90-D10) / D50 is more than or equal to 0.8 and less than or equal to 1.15. According to the composite positive electrode material, the phenomena of enrichment of doping elements on the surface of a single crystal and non-uniform lithiation in the single crystal can be relieved, so that the capacity and the cycling stability of the positive electrode material are improved.

The invention provides a preparation method of a high-compaction lithium iron phosphate positive electrode material, and the method comprises the following steps: providing a first lithium iron phosphate precursor and a second lithium iron phosphate precursor, the first lithium iron phosphate precursor and the second lithium iron phosphate precursor respectively comprising a Li element, a Fe element, a P element and an O element; the particle size Dv150 of the first lithium iron phosphate precursor is 2.0-3.5 m, and the particle size Dv250 of the second lithium iron phosphate precursor is 0.3-0.6 m; iron sources for preparing the first lithium iron phosphate precursor and the second lithium iron phosphate precursor are different; and mixing and sintering the first lithium iron phosphate precursor and the second lithium iron phosphate precursor, and crushing to obtain the lithium iron phosphate positive electrode material. According to the preparation method, the sintering yield of iron is relatively high, the process cost is saved, and the prepared lithium iron phosphate positive electrode material has relatively high compaction density and relatively high gram volume.

To provide an active metal brazing material which can suppress variation in joining.SOLUTION: An active metal brazing material contains one or two kinds of Ti component particles, CuSn alloy particles and CuIn alloy particles, wherein the Ti component particles are composed of one or more kinds of Ti particles and Ti hydride particles, the CuSn alloy particles are composed of Cu and Sn, when the total of Cu and Sn is 100 pts.mass, Cu is 30 pts.mass or more and 80 pts.mass or less, and Sn is 20 pts.mass or more and 70 pts.mass or less, the CuIn alloy particles are composed of Cu and In, and when the total of Cu and In is 100 pts.mass, Cu is 30 pts.mass or more and 80 pts.mass or less, and In is 20 pts.mass or more and 70 pts.mass or less.SELECTED DRAWING: Figure 1

An all-solid-state battery includes a positive electrode layer, a solid electrolyte layer, and a negative electrode layer. A negative electrode mixture layer of the negative electrode layer contains either one or both of a negative electrode active material and a carbon material, a first phase in contact with at least a part of the negative electrode active material and the carbon material, and a second phase in contact with at least a part of the first phase. The first and second phases contain a Li element and an X element which is at least one halogen element selected from the group consisting of F, Cl, Br, and I. An X element concentration in the first phase is higher than in the solid electrolyte layer. An X element concentration in the second phase is lower than the in the first phase and in the solid electrolyte layer.

A catalytic electrode includes a nickel-based porous base material, and a plurality of catalytic alloy balls of nickel and another metal doped with elements, in which the another metal includes iron, the elements include C, F, and S, and the catalytic alloy balls are dispersed on the surface of the nickel-based porous base material. The catalytic electrode also includes a plurality of metal phosphide particles covering the nickel-based porous base material and the catalytic alloy balls, and the metal phosphide particle includes nickel phosphide, nickel iron phosphide, nickel cobalt phosphide, nickel copper phosphide, or nickel zinc phosphide.

The invention provides a device for selectively capturing and separating lithium ions and a preparation method thereof, a roughened copper net is used as a substrate, mercapto polyoxyethylene azobenzene spirobipyridine is used as a capturing agent, and the capturing agent and the roughened copper net are combined through a Cu-S bond, so that the device for selectively capturing and separating lithium ions is obtained. And forming the Azo-2P-PEGn-SCu device which is supported by the roughened copper mesh and of which the surface is covered with the Azo-2P-PEGn-S fragments. The selective capture type lithium ion separation device provided by the invention has relatively good combination selectivity with the lithium salt, the separation of the lithium element does not depend on any crystallization process, and the separation percentage of the Li element is not less than 87%. The Azo-2P-PEGn-SCu device provided by the invention is regenerated by adopting light irradiation, no three wastes are formed in the regeneration process, and the regenerated Azo-2P-PEGn-SCu device still has relatively good selectivity on the lithium salt.

The present application relates to a positive electrode material, an electrochemical device, and an electronic device. The positive electrode material comprises a lithium transition metal composite oxide, the lithium transition metal composite oxide comprises a Li element, a Na element, and a T element, and the T element comprises at least one of Ni, Co or Mn. An electrode comprising the positive electrode material and a lithium sheet are assembled into a button cell, and when the button cell is charged to 4.5 V at a current of 0.04 C within a voltage range of 2.8 V to 4.5 V, the molar ratio of the Li element to the T element in the lithium transition metal composite oxide is w1 which satisfies w1≤0.2. The positive electrode material of the present application has a relatively low lithium content in a charging state, such that the utilization rate of lithium ions in the material can be greatly increased, improving the energy density of an electrochemical device.

The invention belongs to the technical field of advanced ceramics and energy storage, and particularly discloses Li-Zr double-site co-doped garnet solid electrolyte ceramic as well as a preparation method and application thereof, and the chemical formula of the Li-Zr double-site co-doped garnet solid electrolyte ceramic is Li6 (Al < 0.1 > Ga < 0.1 >) La3Zr1.6 (Nb < 0.2 > Ta < 0.2 >) O12; the Li element is from a lithium source, the Al element is from an aluminum source, the Ga element is from a gallium source, the La element is from a lanthanum source, the Zr element is from a zirconium source, the Nb element is from a niobium source, and the Ta element is from a tantalum source. According to the Li-Zr double-site co-doped garnet solid-state electrolyte ceramic as well as the preparation method and the application thereof, the Li-Zr double-site co-doped garnet solid-state electrolyte ceramic has relatively high ionic conductivity, and the cycling stability and the rate capability of a solid-state battery can be improved.

The invention provides a co-doped mechanoluminescent material and a preparation method thereof, and a force-sensitive response household component and a preparation method thereof, and belongs to the field of mechanoluminescent materials. The chemical formula of the co-doped mechanoluminescent material provided by the invention is Ca < 1-x > Li < x > Zn < 0.98-x > Mn < 0.02 > Nb < x > OS, wherein x is more than 0 and less than or equal to 0.1. According to the co-doped mechanoluminescence material disclosed by the invention, the Li element and the Nb element are introduced into the CaZn0. 98Mn0. 02OS mechanoluminescence material, so that the co-doped mechanoluminescence material with excellent mechanoluminescence performance is formed. Compared with most existing mechanoluminescence materials, the mechanoluminescence intensity of the co-doped mechanoluminescence material is remarkably improved, and the mechanoluminescence threshold value is relatively low. Especially when the doping concentration of Li and Nb is 0.05, compared with non-co-doping, when the external force is applied to be 0.2 N, the improvement multiple can reach 34.6 times.

The invention provides a single-crystal positive electrode material, a preparation method thereof and a lithium ion battery. The single-crystal positive electrode material comprises a positive electrode base material and a tungsten-containing coating layer coating the surface of the positive electrode base material, the tungsten-containing coating layer comprises a water-soluble tungsten-containing material and an acid-soluble tungsten-containing material; the positive electrode base material comprises a nickel-based layered oxide positive electrode material; the single-crystal positive electrode material meets the condition that C1 / C2 is greater than or equal to 80%, C1 is the mass ratio of the W element in the water-soluble tungsten-containing material in the single-crystal positive electrode material, which is tested by an ICP (Inductively Coupled Plasma) water-soluble method, to all metal elements except the Li element, and C2 is the mass ratio of the W element in the acid-soluble tungsten-containing material in the single-crystal positive electrode material, which is tested by an ICP acid-soluble method, to all metal elements except the Li element. Through the tungsten-containing coating layer for regulating and controlling the lithium-tungsten ratio, the structure of the coating layer is stable, the coating effect is excellent, the capacity and the cycle performance under high voltage are improved, and the gas production rate in the cycle process is effectively reduced.

The application discloses a high-strength and high-plasticity Mg-Y-Zn-Si-Li-Al alloy and a preparation method thereof, and relates to the technical field of light alloy processing. 97.5 Y1Zn 0.5 In the Mg 97.5 Y1Zn 0.5 Si1base alloy, the Si element is combined with the Y element to form a YSi hard and brittle phase, which is easy to hinder the elongation of the alloy; the addition of the Li element plays a grain refining role on the one hand, effectively improves the strength of the alloy, and optimizes the second phase form on the other hand, promotes the transformation of the second phase to the nanometer level, provides more slip paths for dislocation movement, and avoids plasticity deterioration; the Al element is further combined with the Y element to form a high-strength Al2Y strengthening phase, which not only reduces the precipitation of the hard and brittle phase, but also stabilizes the organizational structure through the pinning effect at the grain boundary.

Provided is a flux-cored wire for welding of structures in extremely low temperature regions, which is capable of obtaining a weld metal having excellent strength and a transverse bulging amount of a desired value or more. The flux-cored wire is defined in terms of the contents of Fe, C, Cr, Ni, etc. in the total mass of the wire, and contains Nb: 0.001 to 0.15 mass%, and V: 0.005 to 0.30 mass%. In addition, the value A1 calculated from formula (1) is 0.02 to 0.30, and the value A2 calculated from formula (2) is 10.0 to 12.3. Formula (1): A1 = [Nb] + [V] Formula (2): A2 = 1.31 x (0.98 x [Cr] + [Mo] + 0.7 x [Nb]) - 1.1 x ([Ni] + 35 x [C] + 20 x [N] + 0.25 x [Cu]). Wherein, [element] is a value indicating the content of the element in the flux-cored wire in mass%. W W W W W W W W W W is a value indicating the content of the element in the flux-cored wire in mass%.​​​​​​​​​

The invention belongs to the technical field of soluble magnesium alloy rods, and discloses a soluble magnesium alloy rod with enhanced elongation, and the magnesium alloy rod comprises the following chemical components in percentage by mass: 1.5%-14.5% of Gd element, 0.5%-4.0% of Y element, 0.1%-2.5% of Zn element, 0.2%-0.5% of Zr element, 0.01%-0.5% of Li element, 0.01%-0.6% of Ni element, 0.01%-0.5% of Ga element, 0.01%-0.5% of In element, 0.1%-2.0% of Cu element and the balance of Mg element. In component design, various elements are scientifically proportioned, the proportion of Gd to Y and the proportion of Zn to Zr are just right, specific elements are added to form a composite structure, the ductility is improved, the dissolution rate and strength are balanced by means of the Cu element, in the performance aspect, dissolution is accelerated at the high temperature of 200 DEG C, the dissolution rate is increased by 10%-15% compared with the room temperature, the degradation period can be shortened, a dissolved product is fine and uniform, and the degradation rate is high. The biocompatibility and environmental friendliness are excellent, the application field is wide, and degradable medical instruments are covered.

The invention discloses a Mg-Y-Zn-Si-Li-Al alloy with a high product of strength and elongation and a preparation method of the Mg-Y-Zn-Si-Li-Al alloy, and relates to the technical field of light alloy processing. According to the Mg-Y-Zn-Si-Li-Al alloy with the high product of strength and elongation and the preparation method of the Mg-Y-Zn-Si-Li-Al alloy, in the Mg97.5 Y1Zn0. 5Si1 basic alloy, the Si element and the Y element are combined to form a YSi hard and brittle phase, and the phase serves as a stress concentration point and is prone to hindering improvement of the elongation of the alloy; the Li element is added, on one hand, the grain refinement effect is achieved, the alloy strength is effectively improved, on the other hand, the form of a second phase is optimized, the second phase is promoted to be converted to the nanoscale, more slippage paths are provided for dislocation motion, and plasticity deterioration is avoided; the Al element is further combined with the Y element to form a high-strength Al2Y strengthening phase, precipitation of hard and brittle phases is reduced, and the structure is stabilized through the pinning effect at the grain boundary.

α-Sialon phosphor particles containing Eu, wherein at least one slit is formed on a surface of the α-sialon phosphor particle, wherein the distance from the surface of the α-sialon phosphor particle to the bottom of the slot is equal to or greater than 200 nm and equal to or less than 1500 nm in at least one cross-section of the slot, wherein the α-sialon phosphor particle is formed from an α-sialon phosphor containing an Eu element, represented by the general formula: (M1 x , M2y,Eu z ) (Si 12-(m+n) Al m+n )(O n N 16-n ) (assuming that M1 is a monovalent Li element and M2 is a divalent Ca element), and in the general formula x = 0, 0 < y < 2.0, 0 < z ≤ 0.5, 0 < x + y, 0.3 ≤ x + y + z ≤ 2.0, 0 < m ≤ 4.0 and 0 < n ≤ 3.0 are satisfied, and wherein the α-sialon phosphor particle is produced by a process comprising: Mixing of raw materials containing an element that forms a Eu-containing α-sialon phosphor particle; Heating a mixture of the raw materials to obtain an α-sialon phosphor; Pulverizing the α-sialon phosphor obtained by heating to obtain the α-sialon phosphor particle; and Subjecting the α-sialon phosphor particle obtained by pulverization to an acid treatment to form the slit on the surface of the α-sialon phosphor particle, wherein the acid treatment is carried out by stirring the α-sialon phosphor particle obtained by pulverization in an aqueous acid solution at a stirring speed of 400 rpm or more, wherein the aqueous acid solution is an aqueous hydrofluoric acid solution or an aqueous mixed acid solution obtained by mixing hydrofluoric acid and nitric acid, and where the stock solution concentration of the aqueous acid solution is equal to or higher than 0.7% and equal to or lower than 100%.

The application discloses a lithium-rich high-nickel porous positive electrode material and a preparation method and application thereof. The positive electrode material is composed of Li, Ni, M, M', M'' and O elements. The molar ratio of the Ni element to the Li element is above 0.64. The ratio of the total molar number of the Ni, M, M' and M'' elements to the molar number of the Li element is n, and 0.7 < n < 1. M is selected from at least one of the 3rd to 6th period metal elements. M' is selected from at least one of the 2nd to 5th period metal elements. M'' is selected from at least one of metal or non-metal elements, and is different from M and M'. In the X-ray diffraction spectrum of the positive electrode material under CuKa radiation, at least one characteristic peak appears at 20° to 35°. The positive electrode material has a pore structure, and the pore structure includes closed pores and open pores. The battery prepared by using the positive electrode material has a 0.1C reversible specific capacity of above 249 mAh / g.

The embodiment of the invention discloses a high-pressure gas switch arc plasma particle component prediction method, system, medium and equipment, and the method comprises the steps: constructing a thermochemical database, and storing the thermodynamic parameters of SF6, air, fluorocarbon and dissociation / ionization decomposition products thereof, and metal steam; the method comprises the following steps: performing atomic-scale decomposition on a detected arc extinguishing medium to identify basic elements, extracting metal vapor, neutral particles containing the elements and charged ions generated by ionization of the neutral particles in combination with a database, and forming a candidate particle list; constructing a reaction equation library (reactants and products are from candidate lists) on the basis of mass conservation, and determining dominant reaction paths under different temperatures and pressures; determining particle number density distribution during balance according to the dominant path, constructing a neural network model taking temperature pressure as input and number density as output, defining a loss function and completing training; and finally, inputting the current arc temperature pressure to quickly obtain the corresponding population density distribution so as to provide support for the optimization of the arc extinguishing performance of the high-voltage switch.

The invention belongs to the technical field of batteries, and discloses a preparation method of a solid electrolyte material, which comprises the following steps: mixing a lanthanum source and a zirconium source, and calcining at 500-900 DEG C to obtain a lithium-deficient phase; the lithium-deficient phase and the lithium-containing phase are mixed and sintered at the temperature of 850-1100 DEG C, the solid electrolyte material is obtained, and the lithium-containing phase comprises the Li element. The solid electrolyte material prepared by the invention has the advantages of few impure phases and high ionic conductivity, and the cycle performance of the battery containing the solid electrolyte material can be improved.

This glass material is formed from silica glass and includes a Group 14 element. The glass material includes an element X that encompasses tin and / or lead, as tetravalent ions X4+ and divalent ions X2+.

According to one embodiment, the present invention provides a method for producing an Sn-containing sulfide solid electrolyte, the method comprising: a step for preparing a raw material mixture containing Li element, Sn element, P element, and S element; and a step for obtaining a Sn-containing sulfide solid electrolyte by subjecting the starting material mixture to a mechanical polishing treatment, in which heat treatment is not performed after the mechanical polishing treatment.

The present invention is to solve the problem that the movement state of the second atomic ion at the time of application of the target voltage and the movement state of the second atomic ion due to diffusion can be detected with high accuracy. To solve the above problem, the ion movement measuring device has a test body and a detection device. The test body has a first electrode and a second electrode, and an electrolyte disposed between the first electrode and the second electrode. The first electrode and the second electrode have layers of the same element as each other, and are at the same potential as each other in a state where no voltage is applied to the test body from the outside. At least the aforementioned first electrode contains a first atom and a second atom of the element with the highest natural abundance ratio in the element at a higher abundance ratio than the natural abundance ratio of the isotopes. The detection device detects ions of the first atom and the second atom released from the electrolyte.

Provided is a phosphor having superior light-emitting properties. A phosphor composition includes: a nitride phosphor that contains, in a composition thereof, an element M that is at least one selected from the group consisting of rare earth elements except cerium, silicon, nitrogen, and cerium; and an oxyfluoride. In the phosphor composition, a content of the oxyfluoride relative to the phosphor composition is 1.5% by mass or higher and 10% by mass or lower according to an X-ray diffraction reference intensity ratio method.

The invention discloses a refining method for remarkably modifying eutectic Si by effectively reducing the use amount of Sr. Belongs to the technical field of aluminum-silicon alloy preparation. According to the method, the Al-Li intermediate alloy is added and reacts with the impurity P in the melt to generate Li3P, and slag phase separation is performed through rotary injection, so that the purpose of removing the impurity P is achieved, the melt is purer and more compact in structure, the content of residual Li in the melt is extremely low, and new elements cannot be introduced to change the casting performance, the mechanical performance and the use performance of the alloy; after the impurity phase is removed, by reducing the adding amount of Sr, the defects of looseness and air holes of an alloy structure caused by hydrogen absorption are effectively reduced, eutectic Si is remarkably modified, different from a traditional superposition element (such as La and Ti), a performance improvement method is found, the adding amount of Sr is sharply reduced by introducing a trace Li element, the cost is reduced, and meanwhile, the purity and the mechanical property of a melt are synchronously improved; and the practicability and economical efficiency of casting the aluminum-silicon alloy are comprehensively improved.

A fluoride phosphor containing: manganese; fluorine; an element M including at least one selected from the group consisting of Group 4 elements, Group 13 elements, and Group 14 elements; and at least one selected from the group consisting of an alkali metal and an ammonium ion. When the total number of moles of the alkali metal and the ammonium ion is 2, the number of moles of the manganese is greater than 0 and less than 0.2, the total number of moles of the element M is greater than 0.8 and less than 1, and the number of moles of the fluorine is greater than 5 and less than 7. The fluoride phosphor has a particle diameter ratio (Da / Dm) that is 0.85 or greater, where Da is a mean particle diameter measured by a FSSS method, and Dm is a volume median diameter measured by a laser diffraction particle size distribution measurement method.

A fluoride phosphor containing: manganese; fluorine; an element M including at least one selected from the group consisting of Group 4 elements, Group 13 elements, and Group 14 elements; and at least one selected from the group consisting of an alkali metal and an ammonium ion. When the total number of moles of the alkali metal and the ammonium ion is 2, the number of moles of the manganese is greater than 0 and less than 0.2, the total number of moles of the element M is greater than 0.8 and less than 1, and the number of moles of the fluorine is greater than 5 and less than 7. The fluoride phosphor has a particle diameter ratio (Da / Dm) that is 0.85 or greater, where Da is a mean particle diameter measured by a FSSS method, and Dm is a volume median diameter measured by a laser diffraction particle size distribution measurement method.

The present application relates to a positive electrode material, an electrochemical device, and an electronic device, the positive electrode material comprising a lithium transition metal composite oxide, the lithium transition metal composite oxide comprising an element Li, an element Na, and an element T, the element T comprising at least one of Ni, Co, or Mn; an electrode comprising the positive electrode material and a lithium sheet are assembled into a button cell, when the button cell is charged to 4.5 V at a current of 0.04 C within a voltage range of 2.8 V to 4.5 V, the molar ratio of Li element to T element in the lithium transition metal composite oxide is w1, and w1 is smaller than or equal to 0.2. The positive electrode material disclosed by the invention has relatively low lithium content in a charging state, so that the utilization rate of lithium ions in the material can be greatly improved, and the energy density of an electrochemical device is improved.

The present invention belongs to the field of environmental protection, and in particular to a separation and enrichment method of a lithium-aluminum electrolyte. First, the ratio of the auxiliary agent is adjusted according to the electrolyte composition so that the molecular molar ratio of alkali metal fluoride to aluminum fluoride is 8-20; then oxygen is evenly introduced into the insulation tank filled with the electrolyte through a conduit, and the temperature is kept at 900-1000 ° C to remove most of the carbon elements, while converting most of the Li elements in the electrolyte into liquid lithium fluoride; then the temperature is lowered to 880-990 ° C to separate lithium fluoride from other electrolytes; then a mechanical device is used to pass most of the LiF melt through the reserved hole of the tank body and put it into a hopper for cooling and storage; finally, the temperature is kept at 890-950 ° C, with a negative pressure of 0-1500 Pa, and the residual LiF is separated from other electrolytes by vacuum distillation. The separated LiF enriched material can be used as an aluminum electrolysis raw material auxiliary agent, or as a lithium extraction raw material, and the remaining electrolyte is returned to the aluminum electrolysis tank for recycling. This invention relies on existing electrolytic aluminum processes, which have low energy consumption, short process, low cost, and convenient operation, and will not cause secondary pollution, thus facilitating industrial application and promotion.

To provide a method for forming a two-component oxide vapor precursor for a deposition process.SOLUTION: A method comprises: providing a two-component oxide vapor source; heating the two-component oxide vapor source to form element vapor from an element component included therein; and reacting the element vapor with a solid two component oxide member included therein. The two-component oxide vapor source includes: a closed end and open end; a first area positioned adjacent to the closed end including the element component; and a second area positioned between the first area and the open end and including an enclosed aggregation structure including the solid two component oxide member and a space passing vapor.SELECTED DRAWING: None

The application belongs to the field of advanced ceramics and energy storage technology, and specifically discloses a Li-Zr double-site co-doped garnet solid electrolyte ceramic and a preparation method and application thereof. 0.1 Ga 0.1 )La3Zr 1.6 (Nb 0.2 Ta 0.2 )O 12 ; the Li element is derived from a lithium source, the Al element is derived from an aluminum source, the Ga element is derived from a gallium source, the La element is derived from a lanthanum source, the Zr element is derived from a zirconium source, the Nb element is derived from a niobium source, and the Ta element is derived from a tantalum source. The application adopts the above Li-Zr double-site co-doped garnet solid electrolyte ceramic and the preparation method and application thereof. The Li-Zr double-site co-doped garnet solid electrolyte ceramic has high ionic conductivity and can improve the cycle stability and rate performance of a solid-state battery.

To provide a steel bar that exhibits superior surface fatigue strength.SOLUTION: A steel bar having a chemical composition comprising, in mass%: C: 0.30-0.50%, Si: 0.05-0.25%, Mn: 1.50-2.60%, P: 0.030% or less, S: 0.100% or less, Cr: 0.50-0.95%, Mo: 0.02-0.35%, V: 0.02-0.35%, Al: 0.005-1.000%, and N: 0.0250% or less, wherein the contents of Si, Mn, Cr, V, and Al satisfy the following formula (1) (where each element symbol in the formula indicates the content of the corresponding element in mass%), the remainder being Fe and impurities; the metallographic structure contains 30% or more in area fraction of bainite and martensite in total; and the Vickers hardness is from 180 to 300 HV. Formula (1): 24≤(Mn+3Cr+2 V+6Al) / Si.SELECTED DRAWING: None