283results about "Electrode extrusion" patented technology

Embodiments described herein relate generally to semi-solid electrodes, and methods of producing the same. In some embodiments, a method of forming a semi-solid electrode can include mixing an active material, a conductive material, and an electrolyte solvent to produce a semi-solid material. The electrolyte solvent is free of electrolyte salt. The method further includes dispensing the semi-solid material onto a current collector and wetting the semi-solid material with an electrolyte solution to form the semi-solid electrode. In some embodiments, the wetting can be via spraying. In some embodiments, the electrolyte salt can have a concentration in the electrolyte solution of at least about 1 M, at least about 2 M, or at least about 3 M. In some embodiments, the solvent can include ethyl methyl carbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), gamma-Butyrolactone (GBL), or any combination thereof.

A dual slot die coater including a lower slot and an upper slot, for extrusion coating of an electrode active material slurry on a surface of a continuously moving current collector. The dual slot die coater includes a lower plate, an intermediate plate positioned on the lower plate and an upper plate positioned on the intermediate plate, the lower slot being formed between the lower plate and the intermediate plate, and the upper slot being formed between the intermediate plate and the upper plate, wherein the lower plate, the intermediate plate and the upper plate have a lower die lip, an intermediate die lip and an upper die lip, each forming an front end with respect to the current collector, respectively, and a thickness of the lower die lip is larger than a thickness of the upper die lip and a thickness of the intermediate die lip.

Embodiments described herein generally relate to semi-solid suspensions, and more particularly to systems and methods for preparing semi-solid suspensions for use as electrodes in electrochemical devices such as, for example batteries. In some embodiments, a method for preparing a semi-solid electrode includes combining a quantity of an active material with a quantity of an electrolyte to form an intermediate material. The intermediate material is then combined with a conductive additive to form an electrode material. The electrode material is mixed to form a suspension having a mixing index of at least about 0.80 and is then formed into a semi-solid electrode.

An apparatus for manufacturing an electrode of a secondary battery, includes: a storage unit to store a slurry; a die coater connected to the storage unit, and to discharge the slurry onto a substrate; a supply unit connected to the storage unit and the die coater, and to supply the slurry from the storage unit to the die coater; a slurry measuring unit to measure a density and a flow rate of the slurry supplied from the supply unit; and a controller to control the supply unit based on the density and the flow rate of the slurry transmitted from the slurry measuring unit.

A method for producing structured electrodes comprises extruding a mixture comprising an active material, a conductive additive, a binder, and a solvent from an extruder to form an active material layer; laminating the active material layer and a current collector; and structuring the active material layer using a structured roller comprising a variety of protrusions forming a variety of features extending into the active material layer.

Systems and methods are provided herein for applying sacrificial material to otherwise uncoated areas of a foil to provide uniform pressure during calendering. For example, one or more portions of a foil may be coated with an active material while other portions of the foil may be coated with an appropriately selected alternate material. After the active material and the alternate material are applied to the foil, the foil may be dried and then calendered. During calendering, the compressive force of the rollers can cause the portion of the foil coated in the active material to stretch a similar amount to the portions of the foil coated in the alternate material. The resulting calendered web has minimal wrinkles due to the similarity of the stretching of the foil coated in the active material and the foil coated in the alternate material.

The battery material production device (200) according to this disclosure has receiving ports (210), spreading parts (220), a joining part (230), and an output port (240). The receiving ports (210) each continuously receive a plurality of different compositions in fluid form. The spreading parts (220) guide each of the injected compositions in the output direction while spreading the compositions in a direction orthogonal to the output direction. The joining part (230) joins the plurality of compositions in layers and guides the product in the output direction. The output port (240) is a slit-shaped opening capable of continuously outputting as an output product the plurality of compositions that have been integrated by spreading and joining.

The present disclosure relates to a composite electrode comprising polymer with carbon particles percolated by gallium or a gallium-indium alloy, and a stretchable battery comprising: a cathode electrode comprising silver oxide and styrene-isoprene block copolymer (Ag2O-SIS) and a cathode current collector; an anode electrode comprising a gallium, carbon, and a polymer and an anode current collector; wherein each of the cathode current collector and the anode current collector comprise: a first current collector of a composite comprising liquid metal eutectic gallium-indium (EGaln), silver (Ag), and styrene-isoprene block copolymer (SIS); and a second current collector a second layer of carbon black (CB) and styrene-isoprene block copolymer (SIS). The disclosure also discloses a method to obtain said composite electrode and said stretchable battery.

Embodiments described herein relate generally to semi-solid electrodes, and methods of producing the same. In some embodiments, a method of forming a semi-solid electrode can include mixing an active material, a conductive material, and an electrolyte solvent to produce a semi-solid material. The electrolyte solvent is free of electrolyte salt. The method further includes dispensing the semi-solid material onto a current collector and wetting the semi-solid material with an electrolyte solution to form the semi-solid electrode. In some embodiments, the wetting can be via spraying. In some embodiments, the electrolyte salt can have a concentration in the electrolyte solution of at least about 1 M, at least about 2 M, or at least about 3 M. In some embodiments, the solvent can include ethyl methyl carbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), gamma-Butyrolactone (GBL), or any combination thereof.

The present invention provides a slot die coater that improves distortion of a die block caused by internal pressure. The slot die coater of the present invention includes an upper plate and a lower plate that are combined with each other to form an outlet, and a shim that is interposed between the lower plate and the upper plate to form a slot that communicates with the outlet, the upper plate having a groove that is parallel to the shim and extends into the upper plate above the slot, and further including a taper block and a pressing bolt that are inserted into the groove to press the shim.

A slot die coater includes an intermediate block, a first block facing one side of the intermediate block, a second block facing an opposite side of the intermediate block, a first spacer between the first block and the intermediate block, the first spacer having a first discharge port, and a second spacer between the second block and the intermediate block, the second spacer having a second discharge port, wherein a pair of first inner surfaces on opposite sides of the first discharge port, respectively, have first protruding lines extending along a lengthwise direction of the first discharge port, each of the first protruding lines having a first height.

Disclosed is a slot die coater that improves die block deformation due to internal pressure. A slot die coater of the present disclosure includes an upper plate and a lower plate assembled with each other to form a discharge port; and a shim interposed between the lower plate and the upper plate to form a slot communicating with the discharge port, wherein the upper plate has a groove recessed into the upper plate parallel with the shim above the slot, and further includes a taper block and a pressure bolt fitted into the groove to press the shim.

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.

A method for producing an alkali metal coated current collector for a battery, wherein the method comprises melting the alkali metal, removing impurities floating on the surface of the molten alkali metal, and applying the purified molten alkali metal to the surface of at least one side of a passing current collector substrate to form a coating on the current collector substrate.A system for manufacturing an alkali metal-coated current collector for a battery comprises at least one extruder, a melting chamber, an inlet extending into the melting chamber, at least one feed roller in the inlet for feeding alkali metal introduced into the inlet into the melting chamber; a heater for melting alkali metal in the melting chamber; an opening in the chamber for removing impurities floating on the molten alkali metal in the melting chamber; an outlet extending from the melting chamber to a discharge opening; a reservoir for receiving molten alkali metal; and at least one drive roller for driving a current collector substrate past the reservoir to receive a coating of molten alkali metal.

The present disclosure relates to an apparatus and a method for manufacturing an electrode of a secondary battery. The apparatus comprises: a storage unit for storing slurry; a mold coater connected to the storage unit and discharging the slurry onto the substrate; a supply unit connected to the storage unit and the mold coating machine and supplying the slurry from the storage unit to the mold coating machine; a slurry measuring unit that measures the density and flow rate of the slurry supplied from the supply unit; and a controller that controls the supply unit on the basis of the density and flow rate of the slurry transmitted from the slurry measurement unit.

A process for producing biscuits (25) of a cathode mixture, which involves introducing into an extruder (42) all the materials (41) required in the cathode mixture, including the secondary electrolyte, all the materials being in particulate form, and operating the extruder (42) while heating the mixture to above the melting point of the secondary electrolyte. The materials required typically comprise a metal powder such as nickel or iron, sodium chloride, and aluminium powder; and the secondary electrolyte is sodium aluminium chloride (NaAlCl4). These materials may all be in powder form. The extruded mixture is used to form biscuits (25). Such biscuits may be used in an electrochemical cell (10).

The application provides a membrane preparation device, a pole piece manufacturing equipment and a membrane preparation method. The membrane preparation device comprises a mixing mechanism, a first feeding mechanism, a second feeding mechanism and an extrusion die. The first feeding mechanism is used for adding a powder mixture containing a powder and a first binder into the mixing mechanism. The second feeding mechanism is used for adding a solution containing a second binder into the mixing mechanism. The mixing mechanism is used for mixing the powder mixture and the solution. The extrusion die is connected to the discharge end of the mixing mechanism and is used for extruding a membrane. When the membrane preparation device is applied to the preparation of an active material layer membrane of a pole piece, the mixing uniformity and the distribution uniformity of the active material mixture can be effectively improved, and the proportion of the active material can be increased. Therefore, the production quality of the pole piece is effectively improved, and the energy density of the battery is effectively improved.

To provide a battery having high energy density and having more stable cycle performance.SOLUTION: In one example, a positive electrode plate includes a positive electrode current collector, and a positive electrode active material layer provided on one side or both sides of the positive electrode current collector. The positive electrode active material layer includes a first active material layer and a second active material layer. The first active material layer is positioned in an intermediate region in a longitudinal direction on a surface of the positive electrode current collector. The second active material layer is positioned on both side edge parts in the longitudinal direction on the surface of the positive electrode current collector or the second active material layer is positioned at a periphery of a surface of the positive electrode current collector. The first active material layer includes a first active material, and the second active material layer includes a second active material. The gram capacity of the first active material is higher than that of the second active material. The positive electrode plate according to the present invention can improve the lithium precipitation problem in a negative electrode plate edge part and a battery including the positive electrode plate has higher energy density and more stable cycle performance.SELECTED DRAWING: Figure 1

A slot die coater according to the present invention is a slot die coater having a slot for ejecting a coating solution, in the direction opposite to gravity, onto the surface of a substrate continuously driven and transferred by a coating roll, the slot die coater comprising a first die block and a second die block which form the slot therebetween, wherein the center of the rotation axis of the coating roll is located closer to the second die block than the upper part of a first die lip forming the front end part of the first die block with respect to the substrate.

An apparatus for manufacturing an electrode of a secondary battery, includes: a storage unit configured to store a slurry; a die coater connected to the storage unit, and to discharge the slurry onto a substrate; a supply unit connected to the storage unit and the die coater, and to supply the slurry from the storage unit to the die coater; a slurry measuring unit to measure a density of the slurry supplied from the supply unit; and a controller to control the supply unit based on the density of the slurry transmitted from the slurry measuring unit.

A negative electrode manufacturing device for a secondary battery includes a dual slot die having an upper block, a middle block, and a lower block, a first slot provided through a gap between the upper and middle blocks and a second slot provided through a gap between the middle and lower blocks. The first and second slots discharge a first negative electrode slurry. The device further includes a coating roll opposite the first and second slots that transfers an electrode sheet coated with the negative electrode slurry discharged from each slot. The upper block, the middle block, and the lower block include an upper lip, a middle lip, and a lower lip forming an outlet at a front end of each block. The upper and lower lips exhibit a magnetism of a same polarity, and the middle and upper lips exhibit a magnetism having an opposite polarity.

Disclosed is an electrode precursor composition suitable for preparing a gel electrode, the composition comprising an organic solvent, an alkali metal salt, an electrically insulating polymer, and a redox-active organic component, where the redox-active organic component is present at a smaller volume fraction than the electrically insulating polymer. The redox active organic component may be present in the electrode precursor composition in an amount of between 1 and 20 vol% based on the total volume of the electrode precursor composition. The redox-active organic component may be present in the electrode precursor composition in an amount of up to 8% by volume based on the total volume of the electrode precursor composition. The redox active organic component may be a redox active polymer.

The present invention relates to the field of electrochemical cells, a mother unit and a method for preparing said cells. The electrochemical cells have a structure comprising at least 2 units. Each unit comprises at least one thermoplastic electronically conductive collector layer, at least one anode layer, at least one electrolyte layer and at least one cathode layer.

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 provides a method of manufacturing an alkali metal coated current collector for a battery, the method comprising melting an alkali metal, removing impurities floating on a surface of the molten alkali metal; the purified molten alkali metal is applied to a surface of at least one side of the passed current collector substrate to form a coating on the current collector substrate. A system for manufacturing an alkali metal coated current collector for a battery pack includes at least one extruder having a melt chamber, an inlet extending to the melt chamber, at least one feed roller in the inlet for feeding alkali metal introduced into the inlet into the melt chamber; a heater for melting the alkali metal in the melt chamber; an opening in the chamber for removing impurities floating on the molten alkali metal in the melt chamber; an outlet extending from the melt chamber to the dispensing opening; a reservoir for receiving molten alkali metal; and at least one drive roller for driving the current collector substrate through the reservoir to receive the coating of molten alkali metal.

The dual-slit die coater according to the present disclosure is a dual-slit die coater including a lower slit and an upper slit, and is configured to extrude and coat an electrode active material slurry onto the surface of a continuously moving current collector through at least one of the lower slit or the upper slit. The dual-slit die coater includes a lower plate, an intermediate plate located on the lower plate, and an upper plate located on the intermediate plate. The lower slit is formed between the lower plate and the intermediate plate, and the upper slit is formed between the intermediate plate and the upper plate. Wherein the lower plate, the intermediate plate, and the upper plate have a lower die lip, an intermediate die lip, and an upper die lip, each of the lower die lip, the intermediate die lip, and the upper die lip forms a front end relative to the current collector, and the thickness of the lower die lip is greater than the thickness of the upper die lip and the thickness of the intermediate die lip.

The present invention relates to a method for manufacturing an electrode comprising a polymer matrix enclosing an electrolyte, the method comprising the steps of: a) preparing a composition comprising components intended to be included in the construction of the electrode; and b) forming an electrode from the composition on a support, the composition being such that the composition prepared in step a) is 0.1 s -1 a composition in paste form having a kinematic viscosity of more than 5000 Pa.s measured at a shear gradient of 0.15 mm and at ambient temperature; - a preparation step consisting of introducing the components intended to be included in the construction of an electrode into a mixer equipped with two co-rotating intermeshing screws rotating in a closed sleeve and mixing the components therein, characterized in that the preparation step is carried out at a temperature below 100°C.

A method and a device are proposed for manufacturing a ribbon electrode, the ribbon electrode being manufactured comprising a ribbon current collector coated on both sides with a layer of electrode material and having on both sides an area extending along one of its longitudinal edges that is not coated with electrode material, in which a ribbon metal foil (100) is coated with the electrode material in a continuous process, a number of parallel strips (120) of electrode material are applied to a first side of the ribbon metal foil (100) and an equal number of parallel strips (110) of electrode material are applied to a second side of the ribbon metal foil (100), so that in a line of sight perpendicular to the ribbon metal foil (100), in each case one strip on the first side (120) overlaps one of the strips on the second side (110) of the ribbon metal foil (100). On both sides between directly adjacent parallel strips of electrode material (110, 120), non-coated strip-like areas (111, 121) remain free of electrode material. The method is characterized in that the parallel strips of electrode material (110, 120) are simultaneously applied to the first and second sides of the ribbon-shaped metal foil (100).

According to one embodiment of the present disclosure, a free-standing film for dry electrode, comprising: a binder, an active material and a conductive material, wherein the free-standing film has a tensile strength of 2000 gf / cm2 or more based on a thickness of 200 µm.

Provided are a coating die head and a coating apparatus for an electrode sheet. The coating die head is provided with a feed inlet (111), a first flow equalizing cavity (11210), flow channels (11220), and a plurality of coating ports (1410); the first flow equalizing cavity (11210) extends in a first direction and is communicated with the feed inlet (111); the plurality of coating ports (1410) are arranged at intervals in the first direction; and the flow channels (11220) are configured to communicate the first flow equalizing cavity (11210) with the plurality of coating ports (1410). In the direction of the coating ports (1410) moving away from the feed inlet (111), the minimum lengths of the flow channels (11220) between the coating ports (1410) among the plurality of coating ports (1410) and the first flow equalizing cavity (11210) show a decreasing trend.