15 results about "Li element" patented technology

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 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 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 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.

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 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.

A main object of the present disclosure is to provide a method for producing an active material wherein a volume variation due to charge / discharge is reduced. The present disclosure achieves the object by providing a method for producing an active material, the method comprising steps of: a preparing step of preparing a LiSi precursor including a Si element and a Li element, and a void forming step of forming a void by extracting the Li element from the LiSi precursor by using a Li extracting solvent, and the LiSi precursor includes a crystal phase of Li22Si5.

Provided is a coated electrode for use in the welding of a structure in an extremely low-temperature region, said coated electrode being capable of obtaining a weld metal having excellent strength and an amount of lateral bulge equal to or greater than a desired value. Provided is a coated welding rod containing 0.001 to 0.400 mass% of Nb, 0.001 to 0.400 mass% of V, and 0.001 to 0.020 mass% of N, in which the contents of Fe, C, Cr, Ni and the like are defined with respect to the total mass of the welding rod. In addition, the value A1 is more than 0.120 and less than 0.500, and the value A2 is less than 0.10. In addition, A1 = [Nb] W + [V] W, A2 = 1.22 * ([Cr] W + [Mo] W + 0.7 * [Nb] W)-([Ni] W + 35 * [C] W + 20 * [N] W + 0.25 * [Cu] W)-10.0. In this connection, [Element] W is the value represented by mass% of the content of the element in the coated electrode.

This invention provides an ultra-high conductivity copper alloy core solder ball, its preparation method, and its application. The core comprises a core and a solder shell covering the core. The core is a copper alloy formed with copper as the matrix and at least one of silver and tin as strengthening elements. The total amount of the strengthening element added is configured to be below 70% of the room temperature equilibrium solid solubility limit of that element in copper, so that all the strengthening elements exist in the copper face-centered cubic lattice in the form of substitutional solid solution atoms without precipitation. The matrix maintains a single-phase solid solution structure without precipitated second phases. The solder shell is a solder alloy with a melting point lower than that of the core alloy. This invention selects a solid solution strengthening technique, which can achieve superior strength and creep resistance compared to pure copper while maintaining extremely high conductivity.

An austenitic stainless steel sheet contains, on a mass basis, C: 0.04 to 0.11%, Si: 2.0 to 3.5%, Mn: 1.50% or less, Ni: 6.0 to 10.0%, Cr: 12.0 to 15.0%, Mo: 1.3 to 3.2%, Cu: 1.00% or less, N: 0.03 to 0.15%, and O: 0.0050% or less, the balance being Fe and impurities; wherein the austenitic stainless steel sheet has a value of Md30 of −30.0 to 0° C., wherein the value of Md30 is represented by the following equation (1):Md3⁢0=551-462⁢(C+N)-
9.2Si-8.1Mn-29⁢(N⁢i+Cu)-13.7Cr-18.5Mo(1)in which the symbols of the elements each represents a content (% by mass) of each element. The austenitic stainless steel sheet has a metallographic structure having a content of a strain-induced martensite phase of 30% by volume or more, and has a thickness of 0.15 mm or less.