126results about "Electrode melt handling" patented technology

The invention discloses a method for preparing a lithium-copper composite negative electrode by utilizing lithium slag and application, and the preparation method of the negative electrode comprises the following steps: adding the lithium slag with certain concentration after removing impurities such as Ca < 2 + >, Mg < 2 + > and Fe < 3 + > through acid treatment into metal lithium in a molten state, and fully stirring until the reaction is complete; and coating the molten metal lithium obtained after the reaction on a current collector to obtain the modified lithium metal negative electrode plate. The prepared lithium-copper composite negative electrode has a lithium-loving 3D frame structure, volume expansion in the circulation process can be inhibited, lithium oxide, lithium aluminum alloy and lithium silicon alloy existing on the 3D frame structure can serve as lithium-loving sites for uniform lithium ion deposition, lithium dendrite growth is inhibited, and long-term stable circulation of the lithium metal negative electrode is promoted.

The invention provides a fast-charging type solid-state lithium battery alloy negative electrode material, a preparation method and a solid-state lithium battery, and relates to the technical field of lithium batteries. The alloy negative electrode material comprises the following element components in percentage by mass: 30-38% of indium In, 30-35% of tin Sn, 28-35% of bismuth Bi and 0-1.5% of doping elements, crystal phases formed by the alloy negative electrode material of the fast-charging type solid-state lithium battery at least comprise two crystal phases, namely InSn4 and InBi. The alloy negative electrode material has relatively high surface capacity, lithium ion conductivity and lithium ion diffusion coefficient, lithium dendrites do not grow on a negative electrode when a solid-state lithium battery assembled by the alloy negative electrode material is charged and discharged under high current density, and the battery is high in energy density and long in cycle life.

The invention belongs to the technical field of lithium metal battery negative electrode materials, and discloses a preparation method of a hollow carbon-based composite lithium negative electrode flexibly applicable to an in-situ polymerization system. The preparation method specifically comprises the following steps: (1) calcining a high polymer precursor to obtain a hollow carbon material; (2) dropwise adding alkali liquor into a metal salt solution, controlling the pH value to be 10-13, and after dispersion is completed, putting the hollow carbon material and dispersion liquid into a polytetrafluoroethylene reaction kettle together for hydrothermal reaction to obtain a negative electrode substrate; and (3) pouring molten lithium into the dried lithium negative electrode substrate to obtain the hollow carbon-based composite lithium metal negative electrode. And finally assembling the prepared composite lithium metal negative electrode in a self-polymerized gel electrolyte system battery to obtain the quasi-solid-state modified lithium metal battery. According to the hollow carbon-based composite lithium negative electrode, the lithium storage space of the three-dimensional substrate is fully utilized, and the deposition behavior of lithium ions is further improved. And meanwhile, by matching with the scene of a self-polymerization system, the electrolyte can fully infiltrate an electrode like a liquid electrolyte so as to smoothly carry out a reaction, and can stabilize the mechanical strength of an interface and prevent penetration of lithium dendrites, so that the overall cycle life and safety performance of the battery are greatly improved.

The embodiment of the invention provides a silicon-based negative electrode material and a preparation method thereof, a negative electrode plate and an all-solid-state battery. The silicon-based negative electrode material comprises spherical porous silicon and metal indium, and the metal indium completely fills pores of the spherical porous silicon and coats the surface of the spherical porous silicon to form a continuous coating layer. The technical problems that the internal structure of the battery is damaged and the interface contact fails due to serious volume expansion or shrinkage of the silicon-based negative electrode material in the charging and discharging process, so that the cycle performance of the all-solid-state battery is poor, and the interface contact can be maintained by high voltage are solved.

A system for applying material is provided. The system includes a die and a flow guide. The die includes an opening and a cavity in communication with the opening. The die is configured to extrude material in a primary application direction through the opening. The flow guide is disposed within the cavity and configured to shape a flow of material extruded by the die. The flow guide includes a flow narrowing portion and a flow shaping portion. The flow narrowing portion extends in a width direction perpendicular to the primary application direction to block material flow in the primary application direction. The flow shaping portion extends downstream from the flow narrowing portion in the primary application direction. The width of the flow shaping portion is less than or decreases from the width of the flow narrowing portion.

The invention relates to a method for producing a pre-product for a battery cell, to a method for producing a battery cell, to a method for producing a battery, and to a battery cell. In a method for producing a pre-product (1) for a battery cell (2), Li and Na are mechanically mixed with one another in the solid state. In this way, a three-dimensional lattice structure can be produced which allows particularly low impedance and thus particularly good electrical transfer.

This invention discloses a ternary transition metal intermetallic electronic compound and its applications. The molecular formula of the transition metal intermetallic electronic compound is A4BC; wherein transition metal A is Ti, Zr, or Hf; transition metal B is Mn, Fe, Co, or Ni; and transition metal C is Fe, Co, Ni, or Mo; the transition metal intermetallic electronic compound has a three-dimensional crystal structure. This invention provides an A4BC-type ternary transition metal intermetallic electronic compound with a spatial structure. Furthermore, the interstitial spaces of this electronic compound contain high-energy interstitial electrons that can migrate between adsorbed metal layers, stabilizing the positively charged metal ion layers together. Simultaneously, these high-energy interstitial positions of the electrons also facilitate the intercalation of metal ions, thereby enhancing the absorption of metal ions and increasing storage capacity.

The present invention relates to a method for manufacturing a homogenized mixture composed of carbon, sulfur, and PTFE, characterized in that sulfur is liquefied, and then the liquid sulfur is milled together with carbon for the first time, such that the liquid sulfur is absorbed by the pores of the carbon particles and forms a preferably powdery composite with the carbon particles, then PTFE is added, and subsequently the mixture of the composite and PTFE is milled for the second time and thereby homogenized.

The invention relates to an electrode active material, an electrode mixture, an electrode layer, a battery, and methods for manufacturing the same. The main purpose of the present invention is to provide an electrode active material having little change in volume due to charge and discharge. The present disclosure solves the above-mentioned problem by providing an electrode active material having a silicon inclusion compound type II crystal phase, the electrode active material having voids inside primary particles, and the void amount P1 of voids having a pore diameter of 5 nm or less being 0.015 cc / g to 0.05 cc / g (inclusive).

The application discloses a kind of cobalt-cobalt disulfide heterojunction embedded nitrogen-sulfur co-doped carbon nanocage positive electrode material preparation and application in lithium-sulfur battery, belong to lithium-sulfur battery positive electrode sulfur host preparation field;Among them, lithium-sulfur battery positive electrode material includes Co / CoS2@NSC nanocage and sublimed sulfur;Lithium-sulfur battery is assembled to lithium-sulfur battery positive electrode material using the application, and the electrochemical performance of each aspect is significantly improved, and the preparation process of the lithium-sulfur battery positive electrode material is simple, and battery assembling process is simple, and cost can be reduced.

This invention provides a composite lithium metal anode structure, its preparation method, and its application. The composite lithium metal anode structure is sheet-like, comprising interconnected photocurable regions and composite lithium metal regions. The photocurable regions are made of a lithiophilic framework material and a photocurable material; the composite lithium metal regions are made of a lithiophilic framework material and lithium metal. The composite lithium metal anode structure provided by this invention effectively suppresses lithium dendrite growth, improves battery cycle stability, enhances battery safety, and reduces manufacturing costs, thus facilitating large-scale application.

The invention provides a process for producing an anode for a lithium battery. The process comprises providing a current collector, depositing a layer of protective material on a surface of the current collector, depositing a layer of a lithiophilic material on a surface of the protected current collector, and depositing a layer of lithium material in molten form on the layer of lithiophilic material, the lithiophilic material thus reacting with the molten lithium material to form a layer of active anode material. The current collector and / or at least one other layer of the anode may comprise a continuous 3D structure. The protective material deposited on the current collector forms a barrier between the current collector and the lithium in the active anode material, the formation of cracks in the current collector thus being avoided.

The invention belongs to the field of battery materials, and particularly relates to an alkali metal battery and a double-gradient 3D carbon current collector, an alkali metal negative electrode, a preparation method and application thereof, the double-gradient 3D carbon current collector comprises a conductive substrate, a first carbon layer compounded on the conductive substrate, and a second carbon layer compounded on the surface of the first carbon layer, the material in the first carbon layer is microporous carbon a in which metal M sulfide is dispersed and distributed; the material in the second carbon layer is a carbon material b with a graded through hole structure, graded through holes comprise mesopores, macropores and super-macropores, and through hole structures exist among the holes. According to the double-gradient 3D carbon current collector prepared by the preparation method disclosed by the invention, the surface layer of the double-gradient 3D carbon current collector is provided with a continuous through macroporous / super-macroporous structure, so that an expressway is provided for electrolyte infiltration and ion transmission, and a battery has excellent high-rate performance. Under high current density, ions can be rapidly supplemented into the electrode, and dramatic polarization increase and rapid growth of dendritic crystals caused by ion deficiency are avoided.

A method for manufacturing an electrode includes feeding an electrode mixture to a first conveyor belt. The electrode mixture includes an electrode active material, conductive carbon, and a polymer binder. The first conveyor belt moves the electrode mixture film in a first belt movement direction. The method further includes conveying the electrode mixture film from the first conveyor belt to a second conveyor belt. The second conveyor moves the electrode mixture film in a second longitudinal direction. The first belt movement direction is at an oblique angle with respect to the second longitudinal direction. And the side rollers on the second conveyor belt fold the electrode mixture film at a certain angle under the support of the pair of guide rollers. The method includes hot pressing the electrode mixture film using at least one hot roller to fiberize the PTFE binder in the second tape movement direction.

The present invention discloses a composite lithium metal anode, a preparation method thereof, and a lithium metal battery. The preparation method of the composite lithium metal anode comprises the following steps: providing a three-dimensional porous carbon-based substrate and a zinc salt solution; adding a nitrogen source and the three-dimensional porous carbon-based substrate to the zinc salt solution at a first preset temperature; soaking the three-dimensional porous carbon-based substrate for a first preset time, removing the substrate, drying it, and then annealing it to obtain a nitrogen-doped zinc oxide-loaded three-dimensional porous carbon-based substrate; and immersing the nitrogen-doped zinc oxide-loaded three-dimensional porous carbon-based substrate in molten metallic lithium to obtain the composite lithium metal anode. The composite lithium metal anode prepared by the present invention can reduce the significant volume change during lithium deposition and dissolution, inhibit the growth of lithium dendrites, and improve the cycle life of the battery.

The present invention discloses a neodymium-doped nickel oxide hollow metal oxide and its preparation method and application. The material is a hollow nano-microsphere composed of neodymium-doped nickel oxide metal oxide nanoparticles, wherein the molar ratio of nickel to neodymium is (20-100):1. The method of the present invention synthesizes a neodymium-doped nickel oxide (Nd‑dop NiO) composite material with a nano-microsphere morphology composed of hollow metal oxide nanoparticles by improving the sol-gel method, comprising the steps of dissolution, solidification, and carbonization, so that the obtained material is a nano-microsphere composed of hollow nanoparticles, which has a large number of adsorption active sites and a large specific surface area, and can better anchor polysulfides in the positive electrode, serving as a sulfur species encapsulation skeleton and providing a conductive framework; at the same time, it has good catalytic activity, which is conducive to accelerating the conversion of polysulfides and enhancing reaction kinetics. The material of the present invention slows down the shuttle effect of polysulfides through the dual effects of adsorption and catalysis, thereby improving the utilization rate and cycle stability of sulfur.

The present disclosure provides a crucible assembly for producing a cathode active material. The crucible assembly includes a first crucible having an open top and an internal space and a second crucible disposed below the first crucible and having an incision groove with an open area at an upper portion of each sidewall.

The present application relates to the technical field of battery, and particularly relates to a high-entropy lithium alloy material, a preparation method, a negative electrode material and a battery. The preparation method provided by the present application grinds metal raw materials of lithium, aluminum, magnesium, tin and zinc into mixed powder; provides a lithium compensation agent, heats the mixed powder to a melting temperature under a protective gas atmosphere, and then adds the lithium compensation agent to form a melt, cools the melt based on a rapid quenching process to obtain a porous composite structure thin strip; places the cooled porous composite structure thin strip in an oxygen-containing gas atmosphere, and the zinc atoms, magnesium atoms and aluminum atoms on the surface of the porous composite structure thin strip respectively react with oxygen and form a passivation layer on the surface of the porous composite structure thin strip; performs fluorination treatment on the side of the passivation layer away from the porous composite structure thin strip to form a protective layer; and performs annealing treatment on the porous composite structure thin strip after the fluorination treatment to obtain a high-entropy lithium alloy material. The problem of insufficient volume expansion inhibition of the high-entropy lithium alloy structure as a negative electrode material is solved.

The application relates to a preparation method and application of a single-crystal metal zinc negative electrode. A polycrystal metal zinc foil with a purity of 98 wt% or more is subjected to melting recrystallization under vacuum or in an inert atmosphere and arranged between two pieces of inert heat-conducting materials to obtain a Zn(002) single-crystal zinc foil with the most densely packed surface. The prepared metal zinc negative electrode has strong corrosion resistance in an electrolyte, high deposition / dissolution reversibility, obviously inhibited side reactions on an electrolyte / negative electrode interface compared with polycrystal or other single-crystal surfaces, can effectively relieve the formation of corrosion bubbles and passivation layers on the negative electrode surface, and improves the cycle stability; meanwhile, the single-crystal zinc plays a role of an epitaxial template within a certain deposition capacity range, guides the conformal deposition behavior of zinc, realizes dendrite-free growth, and prolongs the cycle life of a battery.

An electrochemical cell includes a casing that: includes a lower first element in the form of a vessel, the internal surface of which is at least partially covered by a layer of conductive material so as to form the current collector of the first electrode with a first polarity; includes an upper second element in the form of a cover for closing the vessel; houses a three-dimensional electrode structure with a first electric polarity; houses a three-dimensional electrode structure with a second electric polarity opposite to the first electric polarity; and contains an electrolyte as an ionic conductive medium. The three-dimensional electrode structure with the second electric polarity includes a series of electrodes with a second polarity, each of which is an elongated body with a vertical orientation.

A new cell architecture and manufacturing method is provided that makes solid-state batteries flexible and allows them to be rolled or folded into stacked configurations. [Solution] An electrochemical device is provided that includes a cathode, an anode, and a solid electrolyte disposed between the cathode and the anode, wherein at least one of the cathode and the anode includes an array (15) of segments (11) embedded within a structural matrix, the segments including a lithium host material.

A negative electrode active material includes a silicon-based active material having a crystal grain size of about 300 nm or less. The silicon-based active material has a value of about 2.00 or less as defined by Equation 1 below. The silicon-based active material includes SiOx (x=0) and at least one selected from SiOx (0<x<2), and includes about 70 parts by weight or more of the SiOx (x=0) based on 100 parts by weight of the silicon-based active material. D90−D10 / D50 In Equation 1, D90, D10, and D50 represent diameters of particles corresponding to 90%, 10%, and 50% by volume in a size distribution, respectively.

The invention relates to a preparation method of an elastic eutectic alloy negative electrode, the elastic eutectic alloy negative electrode is prepared by compounding lithium metal and an elastic eutectic alloy, the elastic eutectic alloy is prepared from a component I and a component II, the component I is one or two of metal Mg, Al, Zn, Ga, Ag, In, Sn, Sb and Bi and nonmetal Si, the component II is one or two of metal Ca, Ti, Cr, Mn, Fe, Ni, Cu, Ge, Zr, Nb, Mo and Au, and the component II is one or two of metal Ca, Ti, Cr, Mn, Fe, Ni, Cu, Ge, Zr, Nb, Mo and Au. The types of metals in the components of the elastic eutectic alloy are not more than three. The invention also relates to the elastic eutectic alloy negative electrode prepared by the preparation method and application of the elastic eutectic alloy negative electrode in a bipolar solid-state battery. The elastic eutectic alloy negative electrode can effectively reduce the nucleation potential barrier of lithium metal, induce uniform deposition of lithium and buffer mechanical contact stress, so that volume expansion in the charging and discharging process is relieved, and assembly layering induced by pulverization and volume fluctuation is inhibited.

The application belongs to the technical field of lithium ion batteries, and specifically discloses a preparation method of a double-layer structure nanometer silicon-based negative electrode and a sulfide full solid-state battery, which comprises the following steps: (1) high-temperature melting of nanometerized silicon powder and metal lithium at a certain ratio to prepare a lithium silicon alloy; (2) coating the prepared lithium silicon alloy on a current collector; (3) mixing nanometerized silicon powder and a binder, and covering the mixture on the surface of the coated lithium silicon alloy by using a dry method or a wet method process to obtain a double-layer structure full active silicon-based negative electrode; and (4) assembling the dry positive electrode, an electrolyte film and the double-layer structure nanometer silicon-based negative electrode into a soft package battery. Compared with a pure silicon negative electrode, the double-layer structure nanometer silicon-based negative electrode prepared by the application has higher electronic conductivity, higher specific capacity and better cycle stability, and the preparation process is simple, and the double-layer structure nanometer silicon-based negative electrode can be applied to a soft package battery based on a sulfide electrolyte film, and is suitable for practical application and large-scale production.

The invention provides a hypoeutectic alloy negative electrode material, a preparation method and application of the hypoeutectic alloy negative electrode material in a solid-state lithium battery, and relates to the technical field of solid-state lithium batteries. The hypoeutectic alloy negative electrode material comprises tin and bismuth elements, wherein the mass ratio of the tin to the bismuth is (60-70): (30-40); wherein in the hypoeutectic alloy negative electrode material, tin and bismuth are respectively staggered with each other in a 100-500nm wire-rod-shaped structure, and meanwhile, a part of bismuth is distributed in a tin matrix in a solid solution form. The alloy negative electrode has ultrahigh lithium ion conductivity and lithium ion diffusion coefficient, can be used for preparing a solid-state lithium battery, can perform charge-discharge cycle under low N / P ratio and ultrahigh current density, does not have lithium dendrite growth, ensures that the solid-state battery shows high safety, high energy density, high rate performance and ultra-long cycle stability at the same time, and has a wide application prospect. And the defects in the prior art are overcome.

A method includes providing a current collector including a metal, and forming a lithium layer on at least one side of the current collector. This includes immersing the current collector in a bath of molten lithium, and controlling the thickness of the lithium layer at least in part by at least one of setting a linear velocity through the bath or a residence time of the current collector within the bath. Subsequently, the method provides a current collector having a lithium layer to form a lithium metal anode for a battery cell.

An immobilized chalcogen system or body includes a mixture or combination of chalcogen and carbon. The carbon can be in the form of a carbon skeleton. The chalcogen can include oxygen, sulfur, selenium, or tellurium, or a combination of any two or more of oxygen, sulfur, selenium, and tellurium. The activation energy for chalcogen to escape the immobilized chalcogen system or body is ≥96 kJ / mole.

The invention relates to the technical field of battery manufacturing, in particular to a battery electrode manufacturing method which comprises the following steps: step 1, preparing raw materials; 2, performing hot melting treatment on the prepared raw materials to realize preparation of liquid raw materials; thirdly, the liquid raw material is subjected to mold machining treatment, and machining of the metal cylinder is completed; fourthly, the metal cylinder is cut, and machining of a plurality of metal wafers is completed; 5, the multiple metal wafers are placed on a groove extrusion device to be subjected to extrusion treatment, manufacturing of the battery electrodes is completed, and the electrode plates can be automatically machined through the method.

The invention belongs to the technical field of lithium ion batteries, and particularly provides a multi-element synergistically doped nano-silicon negative electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, melting silicon and a doping element A at a high temperature, cooling, and crushing into nanoparticles to obtain silicon-based solid solution alloy powder; s2, uniformly dispersing the silicon-based solid solution alloy powder in a high-temperature organic solvent under the assistance of a surfactant to obtain dispersion liquid; and S3, adding a doping element B into the dispersion liquid, heating to realize multi-element atomic-scale doping, filtering, and washing to obtain the multi-element synergistically doped nano-silicon negative electrode material. According to the preparation method, atomic-scale uniform doping (not simple compounding of two phases) of multiple elements to silicon is realized through the eutectic alloy medium, and the silicon-based negative electrode material with excellent comprehensive performance is obtained through specific doping sequence design (the element which is in solid solution with the silicon is introduced firstly, and then the element which forms the eutectic alloy with the element is introduced).