40results about "Impregnation manufacturing" patented technology

A manufacturing device of a fiber-type electrode includes: a bath including a coagulant; a transport portion including a supply roll provided outside the bath, a take-up roll provided inside the bath to be immersed in the coagulant, and a winding roll provided outside the bath, and configured to transport a fiber-type substrate; and a nozzle between the supply roll and the take-up roll. The nozzle includes a guide pipe that provides a moving passage of the fiber-type substrate, an inner main body around the guide pipe and that provides a central axis space in which an active material solution is supplied, and an outer main body around the inner main body and that provides a peripheral space in which a polymer solution is supplied.

An electrode assembly, a method for manufacturing the electrode assembly, and a rechargeable lithium battery including the electrode assembly are provided. The electrode assembly includes electrodes and a coating on the electrodes. The coating includes nanofibers, and the nanofibers include polymers and compounds, the polymers including polyamic acid, polyimide, or combinations thereof.

An active material, a solid electrolyte, and a solvent are hard-kneaded to prepare a first electrode material. A dispersion promotion component is added to the first electrode material to prepare a second electrode material. Slurry containing the second electrode material is prepared. An electrode is produced by applying the slurry to a surface of a base material. A composite body is formed by the solid electrolyte adhering to a surface of the active material. The dispersion promotion component promotes dispersion of the solid electrolyte in the solvent.

An electrode assembly includes an electrode, and a coating layer on the electrode. The coating layer includes nanofibers, and the nanofibers include a polymer including polyamic acid, polyimide, or a combination thereof, and a compound.

A method of doping a battery cathode includes preparing a coating with a complex including a metal-based molecular precursor, applying the coating to a battery cathode, and calcining the coating applied to the battery cathode at a calcination temperature of at least 300° C.

The present invention relates to a lithium-ion battery (LiB) having a binder-free anode comprising an active material and about 1-5% by weight of single wall carbon nanotubes (SWCNT) as a conductive additive, wherein the SWCNT has an inorganic impurity content of less than 10% by weight. The LiB of the present invention having a binder-free anode, provides higher capacity than a LiB having an anode that contains a polymeric binder.

A method of manufacturing a component for an energy storage or energy conversion device includes providing a sheet having a plurality of thickness-wise openings, forming a slurry including particles of a ceramic material, depositing the slurry on the sheet having the plurality of thickness-wise openings, and sintering the slurry at a sintering temperature greater than 300°C and less than or equal to 900°C.

This invention belongs to the field of nanocomposite functional material preparation technology, and discloses an alkali metal anode modified with an artificial SEI layer based on in-situ self-assembly of COF, its preparation method, and its application. This alkali metal anode can effectively and efficiently suppress dendrite growth, has a high Young's modulus, and the assembled battery exhibits strong cycle stability, good alkali metal ion migration rate, and good interfacial properties. The preparation method of this invention is simple; a COF layer is synthesized in-situ on the alkali metal surface through the self-deposition assembly of a COF precursor. This COF layer has a rich porous structure, which can uniformly induce alkali metal ion deposition and suppress dendrite growth. This overcomes the problem in existing alkali metal batteries where lithium dendrites easily form on the negative electrode, thus affecting battery performance.

The application discloses a metal lithium negative electrode and a preparation method for improving lithium metal deposition behavior, and the lithium metal deposition behavior can be improved by adding lithiumophilic sites in the through hole of an organic polymer film and under the film; different polymers are mixed and coated on the surface of the metal lithium negative electrode, one of the polymers is removed, the polymer coating on the surface of the metal lithium is in a through hole porous state, and then a lithiumophilic substance is coated and embedded into the pore channel of the polymer coating, so that the purpose of adding the lithiumophilic sites under the film is achieved. The application has the beneficial effects that: through the preparation method, lithium metal can be induced to uniformly nucleate and grow, the lithium metal deposition direction can be changed, the ionic conductivity of the composite protective film can be improved, the generation of lithium dendrites can be inhibited, and the side reaction caused by the direct contact between the negative electrode and the electrolyte can be reduced.

The present application relates to the technical field of deformed battery energy storage devices, and relates to a preparation method of an impact-resistant compression battery electrode with a negative Poisson's ratio structure, in which lithium ion battery electrode active materials, a conductive agent, a binder and a solvent are mixed in a certain mass ratio to prepare electrode ink, the ink is injected into a mold with a negative Poisson's ratio structure made by a 3D printer, and directional freezing is performed on a copper plate immersed in liquid nitrogen.After post-processing such as freeze-drying, a multi-scale electrode with a directional pore structure on a microscale and a macroscopic negative Poisson's ratio structure is finally obtained.The multi-scale biomimetic structure electrode has excellent compressibility and can achieve 50% compression.The electrode also has high specific capacity, good cycle stability and rate performance.The method for preparing a deformed electrode by directional freezing assisted by a mold has low cost, simple operation, wide application range and great application potential.

Embodiments of the present application provide an electrode sheet, a preparation method therefor, a battery cell, a battery, and an electric device, which belong to the technical field of batteries. The electrode sheet includes a current collector, an active material layer, a first insulating layer, and a second insulating layer. The current collector includes a main body portion and a tab, the tab extends from a first end of the main body portion, and the first end is an end of the main body portion in a first direction. The main body portion includes a coated region and a transition region, and the transition region is disposed between the coated region and the tab. The active material layer is disposed on a surface of the coated region. The first insulting layer is disposed on an end face of the main body portion at the first end. At least part of the second insulating layer is disposed on a surface of the transition region, the second insulating layer includes a thermoplastic polymer, volumetric particle size distribution Dv50 of the thermoplastic polymer is 6 µm to 10 µm, and a maximum particle size Dmax of the thermoplastic polymer is 90 µm to 110 µm. The technical solution in the present application is conducive to improving the reliability of the battery cell.

A pouch-type battery manufacturing method includes mounting an electrode assembly in a case, the electrode assembly including a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode. Room for gas is formed on opposite sides of the electrode assembly in the case, and the electrode assembly is impregnated with an electrolyte.

Embodiments of the present application provide an electrode sheet and a preparation method therefor, a battery cell, a battery, and an electric device, relating to the technical field of batteries. The electrode sheet includes a current collector, an active material layer, a first insulating layer, and a second insulating layer, where the current collector includes a body portion and a tab extending from a first end of the body portion, and the first end is an end of the body portion in a first direction; the body portion includes a coated region and a transition region provided between the coated region and the tab; the active material layer is provided on a surface of the coated region; the first insulating layer is provided on an end surface of the body portion at the first end; at least part of the second insulating layer is provided on a surface of the transition region; the second insulating layer includes a first thermoplastic polymer and a second thermoplastic polymer, the first thermoplastic polymer has a volume particle size distribution DV50 of 1 µm to 5 µm, and the second thermoplastic polymer has a volume particle size distribution DV50 of 20 µm to 50 µm. The technical solution of the present application facilitates the improvement of the reliability of the battery cell.

The present invention relates to a battery cell (1) comprising at least one positive electrode (2), at least one negative electrode (3), and at least one separator (4), wherein the positive and negative electrodes (2) comprise a positive porous solid electrolyte polymer foam (5) comprising at least one lithium salt and a positive electrode material (6) disposed within the pores (7) of the positive electrode foam (5), and the negative electrode (3) comprises a negative porous solid electrolyte polymer foam (8) comprising at least one lithium salt and a negative electrode material (9) disposed within the pores (10) of the negative electrode foam (8).

The present application provides a positive electrode plate, a method for preparing the same, and a battery. The positive electrode plate includes a positive current collector, a first positive electrode active coating layer, and a second positive electrode active coating layer. In the first positive electrode active coating layer, a mass ratio of a first lithium manganese iron phosphate active material to a nickel-cobalt-manganese ternary active material is (80-90):(8-15). The second positive electrode active coating layer includes a second lithium manganese iron phosphate active material. An areal density ρ1 of the first positive electrode active coating layer and an areal density ρ2 of the second positive electrode active coating layer satisfy: ρ1 ≥ 240 g / m2, ρ2 ≥ 240 g / m2, and |ρ1 - ρ2| ≤ 5 g / m2.

A manufacturing method of an electrode plate of a rechargeable battery includes mixing a slurry while leaving bubbles in the slurry, coating the slurry containing the bubbles on a substrate, magnetizing the slurry coated on the substrate, and generating an active material layer on the substrate by drying the slurry.

The present invention relates to an apparatus (100; 100) for coating a carrier substrate (006) with a powdered material (004). * ) and at least one first application mechanism (101; 101') comprising a first roller (102; 102') and a second roller (103; 103'), the first roller (102; 102') and the second roller (103; 103') forming a first roller nip (104; 104') serving for film formation in a nip between their peripheral surfaces, through which a powdery material (004) can be conveyed, whereby a first dry film (003) is formed; and a roller (103'; 106) which, together with the second roller (103) or with a further roller indirectly or directly following the second roller (103) downstream in the direction of material flow relative to the second roller (103), forms a second nip (107), through which a substrate path is provided, through which a carrier substrate web (106) to be coated can be guided during operation, and on a first side of the carrier substrate web (106) a dry film (106) formed in the first nip (104) can be provided. * According to the invention, in order to adjust the roller gap (104; 107) between two rollers (102; 103; 102'; 103') arranged adjacent to each other and capable of relative movement, at least one tensioning device (141; 165) with a drive means (132; 133) is provided on the side of the frame, by means of which the rollers (102; 103; 102'; 103') can be moved or compressed toward each other in the adjustment direction and can be moved away from each other again or at least can be decompressed again. * ) regarding.

The present technology relates to a method of manufacturing an electrode for a secondary battery. Since an electrode is manufactured using an insulating composition including an aqueous binder dispersed in a non-aqueous solvent, the wet adhesion of an insulating layer can be increased, and the gelation between an electrode slurry and the insulating composition, which is caused by using different types of binders, can also be prevented.

An electrode assembly includes an electrode, and a coating layer on the electrode. The coating layer includes nanofibers, and the nanofibers include a polymer including polyamic acid, polyimide, or a combination thereof, and a compound.

An electrode (positive electrode (100)) includes a current collector layer (positive electrode current collector layer (110)), an active material layer (positive electrode active material layer (120)) that is stacked on and joined to the current collector layer and contains an active material (positive electrode active material (121)), and an end portion insulating layer (130) that extends from the side of an end portion (110b) of the current collector layer to a side portion (120a) of the active material layer (positive electrode active material layer (120)) and is stacked on the current collector layer to be joined to the current collector layer and the active material layer, the end portion insulating layer (130) containing particles (131) and a binder (132). The occupancy percentage of the particles (131) in the end portion insulating layer (130) is at least 55% and at most 99.5%. The occupancy percentage of the particles (131) and the binder (132) in the end portion insulating layer (130) is at least 55.5% and at most 99%. The thickness of the end portion insulating layer (130) along a stacking direction Z is at least 1 / 20 and at most ½ of the thickness of the active material layer (positive electrode active material layer (120)) along the stacking direction Z.

Systems, methods, and other embodiments associated with fluidization of powder within a funnel to facilitate high powder spreading rate and prevent powder bridging, accumulation, and agglomeration. In one embodiment, an apparatus includes a pair of movable surfaces, the pair of movable surfaces extending in the longitudinal direction, the pair of movable surfaces being positioned near an outlet of a funnel, and a gas delivery device positioned adjacent to an exterior surface of a movable surface of the pair of movable surfaces, the pair of movable surfaces are configured to uniformly distribute powder placed in the funnel across a surface of the pair of movable surfaces. The example apparatus may also include configuring the gas delivery device to deliver gas vertically from an outlet of the funnel towards an inlet of the funnel.

The present invention relates to a method and apparatus for assembling battery cells, the method comprising forming electrode layers in a paste state on a conductive carrier, the electrode layers comprising a mixture of an ionically conductive liquid electrolyte, a monomer or polymer mixture and a polymerization or cross-linking initiator for the monomer or polymer mixture, exposing the electrode layers to radiation to initiate their solidification, and then contacting them with a separator layer in a liquid state before their respective solidification is complete, thereby obtaining solid electrolyte battery cells having properties approaching those of liquid electrolyte battery cells.

Disclosed herein relates to a positive electrode for a lithium secondary battery and a manufacturing method thereof, wherein the positive electrode includes an insulating layer and a positive electrode active material layer sequentially on a positive electrode current collector, but has a cross-sectional structure in which the insulating layer is completely covered on the inside of the edge of the positive electrode active material layer. Accordingly, the positive electrode is easy to control the shape of the edge (or end) of the positive electrode active material layer, and the capacity per unit area / per unit weight of the end of the positive electrode active material layer is significantly reduced. Therefore, the positive electrode has the advantage of being applicable to various lithium secondary battery models because it is easy to control the N / P ratio during assembly with the negative electrode.

A manufacturing device of a fiber-type electrode includes: a bath including a coagulant; a transport portion including a supply roll provided outside the bath, a take-up roll provided inside the bath to be immersed in the coagulant, and a winding roll provided outside the bath, and configured to transport a fiber-type substrate; and a nozzle between the supply roll and the take-up roll. The nozzle includes a guide pipe that provides a moving passage of the fiber-type substrate, an inner main body around the guide pipe and that provides a central axis space in which an active material solution is supplied, and an outer main body around the inner main body and that provides a peripheral space in which a polymer solution is supplied.

The present invention discloses a method for preparing battery-grade graphite by using mixed waste of positive and negative electrode materials of a failed lithium-ion battery as a raw material, the method comprising: placing mixed waste of positive and negative electrode materials of a failed lithium-ion battery in a muffle furnace, and performing low-temperature roasting surface modification, which removes adhesive and residual electrolyte from the surfaces of the electrode materials, to obtain a powder; placing the powder in a flotation machine, adding clean water and stirring the slurry, improving a subsequent flotation separation effect of positive and negative electrode materials; on the basis of a difference in hydrophilic and hydrophobic properties of the positive and negative electrode materials, separating the positive electrode material from negative electrode graphite by means of flotation to obtain a foam product (a body rich in negative electrode graphite) and an ore slurry product (a body rich in positive electrode material); and after the foam product has undergone weak acid washing and been filtered and dried, performing repair at a high temperature to obtain a graphite product which has excellent electrochemical properties. By means of performing low-temperature roasting surface modification, flotation separation, weak acid washing and high-temperature graphitization repair on mixed waste of positive and negative electrode materials of a failed lithium-ion battery, the present invention recycles negative electrode graphite in the mixed waste of positive and negative electrode materials.