3681results about "Electrode collector coating" patented technology

The invention provides a pole piece and a manufacturing method thereof, a rolling system and a secondary battery, and the manufacturing method of the pole piece comprises the following steps: coating slurry on a current collector and drying to obtain a dried pole piece; the difference between the thickness of the dried pole piece and the preset thickness after rolling is used as the total rolling reduction; the dried pole piece is subjected to continuous multi-stage rolling, adjacent two-stage rolling is carried out, the percentage of the rolling reduction of the previous-stage rolling in the total rolling reduction is larger than or equal to the percentage of the rolling reduction of the next-stage rolling in the total rolling reduction, and the sum of the rolling reduction of all stages of rolling is equal to the total rolling reduction; in the multi-stage rolling, the rolling reduction of each stage of rolling is gradually reduced on the whole; and the multi-stage rolling is cold pressing. According to the manufacturing method of the pole piece, the multi-stage rolling mode is adopted, the rolling reduction decreasing and roller gap adjusting mode is adopted, the diameter, roughness and hardness of the roller body are combined to adapt to different rolling reduction, and finally the consistency of stress release and the pole piece is achieved.

The present invention relates to a method of manufacturing an electrode of an all-in-one battery comprising the steps of mixing an electrode active material, a solid electrolyte and a first binder with a first solvent to prepare a primary slurry; drying the primary slurry to prepare a mixture powder; mixing the mixture powder, a conductive agent, and a second binder with a second solvent to prepare a secondary slurry; and coating the secondary slurry on a current collector.

The invention discloses a novel lithium battery pole piece coating machine, which belongs to the technical field of coating machines, and comprises a coating machine body, and an unwinding device, a scratch monitoring device, a tensioning device, a sectional rolling assembly, a cutter assembly, a continuous rolling assembly, a coating assembly and a winding device which are sequentially arranged in the winding direction of a pole piece from front to back, the scratch monitoring device comprises a supporting rod fixed to the coating machine body, the length direction of the supporting rod is consistent with the width direction of the pole piece, and a plurality of linear array cameras are evenly arranged on the lower side of the supporting rod in the length direction at intervals; the sectional type rolling assembly comprises a main motor, an output shaft and a pressing roller, the output shaft comprises multiple sections of supporting shafts which are sequentially connected in the axial direction, and the two ends of each supporting shaft are connected with a first hinge joint and a second hinge joint correspondingly. According to the lithium battery pole piece coating device, protrusions and recesses on the surface of the lithium battery pole piece can be treated in time, and the uniformity of the subsequent pole piece during coating is improved.

A method for manufacturing an anode electrode includes rolling a first aluminum foil layer; annealing the first aluminum foil layer to create a first annealed aluminum foil layer; mechanically bonding a first lithium metal foil layer between an anode current collector and the first annealed aluminum foil layer; and aging the anode electrode to prelithiate the first annealed aluminum foil layer.

A solid-state battery, preferably a pouch cell, includes a cathode including cathode active material comprising Li ions, graphene, and optionally a binder; an electrolyte; and an anode, preferably a lithium anode, wherein said electrolyte is positioned in between said cathode and said anode.

The utility model provides a battery negative pole piece and battery, battery negative pole piece includes current collector and active layer, active layer is coated on current collector at least one side surface, on the active layer is equipped with a plurality of groove structure along the length direction of current collector, groove structure extends along the width direction of current collector, and the groove structure is equipped with the groove structure. The active layer is divided into a plurality of areas by the plurality of groove structures along the length direction of the current collector, and each area is provided with a plurality of hole structures. According to the battery negative plate, the hole structures and the groove structures which are sequentially and alternately arranged in the length direction of the current collector are adopted, the liquid injection time of the battery is shortened, meanwhile, the liquid retention amount of electrolyte is increased, the wettability of the electrode is improved, the cycle life is prolonged, the service life of the battery is prolonged, and the performance stability of the battery is improved; and the problem that the battery performance is influenced due to poor wettability of the battery negative plate in the prior art is solved.

A method for manufacturing an electrode for a secondary cell, comprising the steps of: providing an electrode substrate comprising an electrically conducting material; forming an active layer on the electrode substrate, wherein the active layer comprises a plurality of carbonaccous particles; exposing the active layer to a magnetic field configured to orient a majority of the particles along a normal of the substrate; and exposing the active layer to laser pulses or mechanical rollers to form a plurality of passages in the active layer, thereby facilitating ionic transport towards the substrate.

The present disclosure relates to a lithium-ion battery component and methods for manufacturing the lithium-ion battery component. The battery component, in some examples, includes a current collector, a porous deposit of first active material and first binder on the current collector, and a solvent-free electrode layer of second active material and second binder laminated with the porous deposit to at least partially occupy the pores of the porous deposit.

The invention provides a mixed negative electrode material. The mixed negative electrode material comprises a silicon carbon material and a graphitized material, the silicon-carbon material takes porous carbon as a matrix, and a silicon layer and an ordered layered carbon layer are sequentially deposited on the surface of the porous carbon matrix; the compaction density of the mixed negative electrode material is 1.0-2.0 g / cm < 3 > and the conductivity is 0.80-118 S / cm under the pressure of more than or equal to 5 Mpa; the ratio of the mass ratio of the graphitized material to the mass ratio of the silicon-carbon material is greater than or equal to 1.6 and less than or equal to 8.5, and the particle size Dv10 of the mixed negative electrode material is 1.1-5.2 mu m; dv50 is 5.3 [mu] m to 16 [mu] m; dv90 is from 16 [mu] m to 35 [mu] m; the porosity of the mixed negative electrode material is 0.005%-0.1%; the specific surface area is 1.2-3.2 m < 2 > / g, and the surface of the negative electrode is provided with a cutting area. The problems that the negative electrode interface stability is reduced, the impedance is increased, the lithium ion conducting capacity is low, and the battery cycle performance is poor are solved.

The present invention discloses a method for producing a positive electrode current collector coated with an adhesion promotion layer, the method including: (S1) preparing an aqueous slurry in which a hydrocarbon-based water-soluble binder polymer is dissolved and polyvinylidene fluoride-based polymer particles and a first conductive material are dispersed; and (S2) coating at least one surface of a metal current collector with the aqueous slurry, and heat-treating the aqueous slurry at a temperature higher than the melting point of the polyvinylidene fluoride-based polymer particles, and drying the coated surface to form an adhesion promotion layer.

A dual-slot die coater including a first slot and a second slot for discharging a coating solution in a direction opposite to gravity, a first die block vertically installed on a rear portion of an upper surface of a base, a second die block arranged on a front surface of the first die block to form the first slot between the second die block and the first die block, and a third die block arranged on a front surface of the second die block to form the second slot between the third die block and the second die block, and further includes an alignment block provided between a front portion of the upper surface of the base and a lower surface of the second die block and fastened and coupled to the lower surface of the second die block and a lower surface of the first die block by bolts.

A system and methods for manufacturing a dry electrode for an energy storage device are disclosed. The system includes a first dry electrode material delivery system configured to deliver a dry electrode material, a first calendering roll, a second calendering roll, and a controller. The second calendering roll is configured to form a first nip between the first calendering roll and the second calendering roll. The first nip is configured to receive the dry electrode material from the first dry electrode material delivery system, and form a dry electrode film from the dry electrode material. The controller is configured to control a rotational velocity of the second calendering roll to be greater than a rotational velocity of the first calendering roll. The method may include providing a multi-roll calender system comprising a first calender roll, a second calender roll; rotating the first calendering roll at a first rotational velocity; rotating the second calendering roll at a second rotational velocity; providing a first dry electrode material to a first nip between the first calendering roll and the second calendering roll to form a dry electrode film. The second rotational velocity may be greater than the first rotational velocity.

The invention provides a positive pole piece, a solid-state battery and a preparation method of the positive pole piece, and belongs to the technical field of secondary batteries, and the positive pole piece comprises a positive current collector and a positive active material layer. Wherein the positive electrode active material layer is arranged on the positive electrode current collector, the interface layer is arranged on the positive electrode active material layer, the interface layer comprises a first polymer, and the first polymer comprises polyether sulfonate. According to the positive pole piece provided by the invention, the polymer interface layer formed by cross-linking polyether sulfonate is arranged on the surface of the positive active material layer, so that the interface contact and ion transmission efficiency between the positive pole piece and the solid electrolyte membrane are effectively improved based on good ionic conductivity, chemical stability and mechanical flexibility of the interface layer; the interface impedance between the positive pole piece and the solid electrolyte membrane is reduced, and the side reaction of a contact interface is inhibited, so that the rate capability and the cycle life of the solid-state battery are effectively improved.

The invention provides a preparation method of a carbon composite current collector without a macromolecular adhesive. The method ingeniously utilizes charge transfer and pi-pi interaction between the conductive carbon material and the auxiliary agent to realize infiltration of the conductive carbon material, and assists uniform mixing of the conductive carbon material to finally form the paste slurry. And after the pasty slurry is pressed and washed, the carbon composite current collector with uniform thickness and good conductivity is constructed on the surface of a substrate. In the carbon film, the carbon nanotubes with the one-dimensional structure construct a conductive network, the graphite powder or graphene with the two-dimensional structure plays a role in bonding the carbon tubes under high voltage by utilizing the flexibility of the graphite powder or graphene and through pi-pi interaction, the contact resistance between the carbon tubes is reduced, and the mechanical property of the composite current collector is enhanced. The preparation method is simple in process and low in cost, the prepared carbon composite current collector is outstanding in chloride ion corrosion resistance, and powerful guarantee is provided for performance improvement and long-term stable operation of a chloride ion-containing water system energy storage device.

A battery comprising at least one current collector including a first surface and a second surface opposite the first surface, where the at least one current collector is characterized by a longitudinal body section and a lateral body section extending from the longitudinal body section, a first active material positioned on the first surface on the longitudinal body section, and a second active material positioned on the first surface on the lateral body section.

The application discloses a battery current collector coating device, which comprises a frame, a conversion mechanism, a pole piece, a cylinder, a cylinder rod, a transfer box, a suction pump, a material storage mechanism, a sliding cylinder, a sliding pipe, a guide block, a guide groove, a spring and a spray channel. The frame is provided with the conversion mechanism, the conversion mechanism is provided with the pole piece, the frame is fixedly provided with the cylinder, the cylinder rod of the cylinder is in sliding connection with the frame, the cylinder rod is welded with the transfer box, the transfer box is in contact with the frame, the frame is fixedly provided with the suction pump, the suction pump is connected with the transfer box through a hose, the frame is provided with the material storage mechanism, the sliding cylinder is welded on the transfer box, the sliding pipe is in sliding connection in the sliding cylinder, the spring is arranged in the sliding cylinder, and the sliding pipe is provided with the spray channel at the tail end. The application relates to a battery current collector coating device and a coating process thereof, and has the characteristics that tailing phenomenon is not easy to occur during pole piece coating and the pole piece coating is more uniform.

The present application relates to a kind of composite current collector and its preparation method, belong to secondary battery technical field.The composite current collector provided by the present application has the original structure of sharp cone for shape memory polymer support layer, and the opening of support layer is filled with foaming agent and foaming aid.A kind of composite current collector provided by the present application can reduce weight and improve the energy density of battery.Secondly, the composite current collector provided by the present application increases the heat-sensitive function, which can cut off the electrochemical reaction inside the secondary battery on one hand after the thermal runaway and external impact of battery, and can reduce the heat generation of secondary battery on the other hand when the secondary battery is at high temperature, which has a triple guarantee for the safety performance of battery.

An energy storage device, such as a lithium-ion battery, without tabs connecting the electrode jelly roll to the can, and a method for making the same, is described. A series of flags may be cut, bent, and interleaved with one another to form connection points for upper and lower collector plates within the can. The upper and lower collector plates can be welded directly to the interleaved flags to form connection points for the anode and cathode in the energy storage device.

This application provides a battery electrode detection and control system that can improve the yield of electrode sheets. The electrode detection and control system is applied to an electrode coating system, which includes an unwinding device, a first-side coating device, a first-side drying device, and a winding device arranged in sequence. The electrode detection and control system includes a first detection device disposed between the unwinding device and the first-side coating device. The first detection device is used to detect the size of the area to be coated on the first surface of the electrode substrate output by the unwinding device, wherein the first surface is perpendicular to the thickness direction of the electrode substrate.

Generally described, one or more aspects of the present disclosure relate to methods, systems, and devices related to pre-straining bare lanes of a multilane electrode with a system for calendering a multilane electrode including a pre-strain roll device including a plurality of pre-strain rollers and a pressure roller forming a pre-strain nib and a calender roll device comprising a pair of calendering rollers forming a calendering nip positioned downstream from the pre-strain roll device.

A method for preparing a positive electrode material and an energy storage battery are provided. The method includes: preparing an Fe-MOF, including: dispersing a first iron source in a solvent, adding the cyanamide organic ligands into the solvent to perform reflux reaction to obtain a reaction solution, and performing cooling, filtering, and cleaning on the reaction solution to obtain the Fe-MOF; grinding and blending the Fe-MOF with a second iron source, a lithium source, and a phosphorus source to obtain a premix; and performing a sintering treatment on the premix under an atmosphere of an inert gas to obtain a composite lithium iron phosphate positive electrode material. The composite lithium iron phosphate positive electrode material includes lithium iron phosphate particles and carbon nanotubes, the lithium iron phosphate particles are attached to a surface of the carbon nanotubes, and there is iron wrapped by each of the carbon nanotubes.

A powder dispensing apparatus having an elongate wedge-shaped hopper including one or more fluidized plates is described. The powder dispensing apparatus can be positioned above a pair of calender rolls to distribute a powder, such as a dry electrode material onto the calender rolls. Such fluidized wedge shaped hopper advantageously allows for an accurate and / or controlled rate of powder distribution across or substantially across the length of a calender roll.

The invention relates to the technical field of lithium ion batteries, in particular to a lithium iron manganese phosphate battery and a preparation method thereof, and the lithium iron manganese phosphate battery comprises a positive pole piece and a negative pole piece; the positive pole piece comprises a positive current collector and a positive active material layer arranged on the surface of the positive current collector; the positive electrode active material layer comprises lithium manganese iron phosphate; the lithium manganese iron phosphate comprises LiMnxFe1-xPO4, and x is more than or equal to 0.4 and less than or equal to 0.9; the surface density of the positive electrode active material layer is 493.4-584.3 g / m < 2 >; the negative electrode plate comprises a negative electrode current collector, a first negative electrode active material layer arranged on the surface of the negative electrode current collector and a second negative electrode active material layer arranged on the surface of the first negative electrode active material layer; the first negative electrode active material layer comprises first graphite; in a Raman spectrogram of the first graphite, ID / IG is 0.05 to 0.15; the second negative electrode active material layer comprises second graphite; and in the Raman spectrogram of the second graphite, ID / IG is 0.4-0.65. The lithium manganese iron phosphate battery provided by the invention has significantly improved energy density and charge.

A process for producing a porous host structure or a powder mass of multiple porous particulates containing silicon oxide (SiOx) therein, comprising (a) providing a porous host structure having a volume fraction of pores from 5% to 99.9%, wherein the porous host structure is selected from a carbonaceous, graphitic, graphene, or metallic material; (b) catalytically vaporizing Si from a mixture of a catalyst and elemental Si or a Si-containing material to form a vapor phase of Si or a precursor to Si; (c) immediately directing the vapor phase into pores of the porous host structure and facilitating the vapor phase to form solid Si particles or coating deposited in the pores to form a Si-impregnated porous host structure; (d) exposing the Si to an oxidizing environment to obtain SiO2-coated Si particles / coating or SiOx; and (e) optionally breaking and reducing the SiOx-impregnated porous host structure into smaller porous particulates.

Provided is a negative electrode comprising a current collector with tensile strength ranging from about 1,000 MPa to 2,000 MPa and an active material layer. The current collector may be a Fe—Ni alloy foil containing nickel (Ni) from about 10 wt % to 60 wt % with an average grain size of less than 10 nm. An all-solid-state battery including this negative electrode and a method for its preparation are also described. The method involves stacking and isostatic pressing, with specific parameters for pressure, temperature, and time.

A positive electrode for a secondary battery including a positive electrode current collector, and a positive electrode active material layer supported on the positive electrode current collector. The positive electrode active material layer includes active material particles and an oxide film covering at least part of surfaces of the active material particles. The active material particles include a lithium-containing transition metal oxide, and the oxide film contains an oxide of a first element other than nonmetal elements. When a thickness of the positive electrode active material layer is denoted by TA, Tb<Tt is satisfied, where the Tb and the Tt are thicknesses of the oxide film at a position of 0.10TA and at a position of 0.90TA, respectively, from a surface of the positive electrode current collector in the positive electrode active material layer.

The present invention pertains to an anode-less lithium ion battery comprising a) a cathode comprising a cathode current collector and a cathode electro-active material on the cathode current collector; b) an anode current collector; c) a liquid electrolyte composition between the a) cathode and the b) anode current collector; and d) a separator, wherein the c) liquid electrolyte composition comprises i) at least 70% by volume (vol %) of a solvent mixture with respect to the total volume of the electrolyte composition, comprising at least one fluorinated ether compound and at least one non-fluorinated ether compound, and ii) at least one lithium salt.

Calendering methods that accurately and / or precisely calender dry electrode films, and systems thereof, are described. The methods and systems are able to control the calendering nip and / or calendering distance between the calendering rollers with and / or without the presence of an electrode film and / or electrode powder mixture such that the variation of the calendering distance is reduced.

Disclosed are a positive electrode plate and a lithium-ion battery including the same. The positive plate includes a positive electrode current collector and a positive electrode coating layer; and the positive electrode coating layer includes a first coating layer and a second coating layer, wherein the first coating layer is coated on the positive electrode current collector surface, and the second coating layer is coated on the first coating layer surface. The lithium-ion battery has a good safety performance, and when mechanical misuse (needling, weight impact) occurs, the probability of battery fire failure is significantly reduced.

The invention relates to the technical field of batteries, in particular to an electrode assembly, a preparation method and a lithium ion battery, the electrode assembly comprises a positive pole piece, a negative pole piece and a diaphragm, the positive pole piece comprises a positive current collector and a positive active material layer, and the positive active material layer comprises a positive active material layer and an inorganic coating; the positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer comprises a positive electrode active material, and the positive electrode active material comprises a ternary positive electrode material of which the core nickel content is more than 80 at% and the shell manganese content is 10-20 at%; the negative active material comprises silicon-based active particles and a three-dimensional elastic conductive network layer coating at least part of the surface of the silicon-based particles, and the positive active material and the negative active material are improved, so that various properties of the electrode assembly are good and stable, the overall electrical property and safety of the battery are improved, and the cycle life of the battery is prolonged.