394results about "Electrode molding" patented technology

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.

The invention discloses a method for improving the fibrillation state of a dry-method electrode, and relates to the technical field of lithium batteries. The method comprises the following specific steps: mixing an active substance and a conductive agent for pre-dispersion, adding a binder during pre-fibration, adjusting dry-mixing equipment, continuously stirring to realize fibrillation, and cooling and homogenizing to obtain a dry-mixed electrode material; preparing an original film, and laminating with a current collector to obtain a finished product pole piece; the influence of the particle size on the fibrillation state is analyzed according to the state of the fibrillated material, so that different processes are selected, and the input power and the process of dry mixing equipment are controlled to control the fibrillation state of the dry-method electrode.

The invention relates to the technical field of lithium batteries, in particular to a multi-layer negative electrode and a preparation method and application thereof.The base foil of the multi-layer negative electrode is provided with a bottom layer, the bottom layer is provided with a surface layer, and the surface layer comprises surface layer glue, surface layer conductive carbon and a surface layer active substance; the peel strength of the bottom layer is recorded as Rb, the peel strength of the surface layer is recorded as Rs, the rebound correction coefficient of the surface layer is recorded as Ee, the mass percent of surface layer glue in the surface layer is recorded as Cc, Rb is larger than or equal to 60N / m and smaller than or equal to 320N / m, Rs is larger than or equal to 5.6 N / m and smaller than or equal to 42N / m, Ee is larger than or equal to 0.233 and smaller than or equal to 1.45, Cc is larger than or equal to 1.2% and smaller than or equal to 7.5%, and [In (Rb / Rs-0. 4)] * (Ee / Cc) 1 / 2 is larger than or equal to 0.12 and smaller than or equal to 26.67. According to the invention, the negative electrode is designed into a multi-layer structure and is supplemented with the surface glue with excellent performance, so that the anti-expansion performance of the multi-layer negative electrode is improved under the synergistic effect, and the rapid charging performance and the long cycle performance of the lithium ion battery can be improved.

The invention discloses a low-porosity and low-impedance dry positive electrode of a solid-state battery and a preparation method of the low-porosity and low-impedance dry positive electrode. The dry positive electrode of the solid-state battery comprises a large-particle positive electrode active material, a small-particle positive electrode active material, a first conductive agent, a second conductive agent, a third conductive agent, a small-size sulfide solid electrolyte, a large-size sulfide solid electrolyte and a binder. All the components are mixed in a manner of size matching and step-by-step embedding. Size matching among multi-stage particles is introduced, so that the size of gaps among different components is reduced, and the porosity is reduced; the binding agent and part of the conductive agent are premixed to form a'binding-conductive double network ', and then the active material and the electrolyte are gradually embedded, so that the purpose of low impedance of the composite positive electrode is achieved. And finally, the rate capability and the cycling stability of the solid-state battery are improved.

The invention provides a positive pole piece, a battery and a preparation method of the positive pole piece. The positive pole piece comprises a positive current collector and a composite layer arranged on the surface of at least one side of the positive current collector, the composite layer comprises a first composite layer, a second composite layer and a third composite layer which are sequentially arranged along the thickness direction of the positive pole piece, and the first composite layer is arranged on the surface of the positive current collector; the first composite layer comprises a first conductive agent and a first binder, the second composite layer comprises a positive electrode active material, a second conductive agent, a second binder and a first fast ion conductor, and the third composite layer comprises a third conductive agent, a third binder and a second fast ion conductor. According to the invention, the electrochemical performance of the battery prepared by a dry-method electrode preparation process can be effectively improved.

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.

Provided are a method and apparatus for calibrating contact parameters of electrode materials, and a computer storage medium. The method includes the following operations. A discrete element simulation test is performed on an electrode material based on a calibration model and calibration ranges of contact parameters of the electrode material when an axial force-displacement curve of a target pellet of the electrode material meets an adaption condition of the contact model; then a simulated axial pressure-axial strain relationship of the electrode material is acquired based on a target discrete element simulation parameter of the electrode material; whether the contact parameters are calibrated successfully is judged based on this relationship; and when the contact parameters are calibrated successfully, calibration results of the contact parameters are determined.

The invention discloses double-roller type pressing equipment for lithium battery production and manufacturing, and relates to the technical field of lithium battery production, the double-roller type pressing equipment comprises a machine base, and a lifting frame and a supporting frame are fixedly mounted on the two sides of the top of the machine base correspondingly; and the conveying assembly is used for guiding and conveying the lithium battery pole pieces, and the conveying assembly is fixedly mounted at the top of the lifting frame. According to the double-roller type pressing equipment for lithium battery production and manufacturing, before a pole piece is pressed, a worker adjusts the height of a guide roller and a bearing frame set, so that the pole piece is placed above the bearing frame set, the guide roller and a rotating rod are arranged on the two sides of the pole piece when the pole piece is conveyed and generate friction with the surface of the pole piece, and at the moment, a second motor drives the guide roller to rotate; the pole pieces are guided and conveyed, the pole pieces are pretreated by the guide rollers and the rotating rods before being pressed, the pressing positions are more fit, and the obliquely arranged lifting frame rubs with the pole pieces through the guide rollers, the rotating rods and the pole pieces to clean dust on the pole pieces when the pole pieces are conveyed.

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.

The invention provides an electrode preparation method and system, an electrode and a battery. The electrode preparation method comprises the following steps: freezing and embrittling a binder; the binding agent is smashed into binding agent powder; mixing the binder powder with an active substance to form a mixed material; the mixed material is subjected to pre-fibration, and a pre-fibration material is formed; carrying out roll forming on the pre-fibration material to form an electrode diaphragm; and compounding the electrode diaphragm with a current collector to form the electrode. According to the electrode preparation method disclosed by the invention, the adhesive is frozen and embrittled, so that the toughness of the adhesive is remarkably reduced, and the brittleness of the adhesive is increased, and therefore, the adhesive can be uniformly crushed into fine particles, the mixing uniformity and the pre-fibration degree of the adhesive and other materials can be improved, and the uniformity of the thickness of the electrode is further effectively improved; and moreover, high-speed film formation of the electrode diaphragm is facilitated, the production efficiency of the electrode can be effectively improved, and meanwhile, the uniformity of electrode resistance can be ensured.

The invention provides a high-performance double-layer graphite negative electrode and a preparation method and application thereof. The invention provides an optimal configuration design of a double-layer graphite negative electrode, an upper layer (close to a diaphragm side) of the electrode is composed of energy type graphite, a lower layer (close to a current collector side) of the electrode is composed of power type graphite, an upper layer D50 is 12-50 microns, a lower layer D50 is 1-10 microns, preferably, the upper layer comprises a combination of primary particles and secondary particles of graphite, and the lower layer of the electrode comprises the primary particles of graphite. When the double-layer graphite negative electrode disclosed by the invention is applied to a battery system, the problem of lithium separation in the charging and discharging process of the battery can be effectively solved on the whole, and the cycle life of the battery is greatly prolonged, so that the graphite-based lithium ion battery has high energy density, high power density and long service life.

The invention discloses a preparation method of a self-supporting silicon-carbon electrode plate. The preparation method comprises the following steps of expanded graphite preparation, nitrogen doping, pore forming, silicon compounding and compression molding. The innovation of the invention is that the integrated pole piece with a three-dimensional elastic conductive network is constructed through the porous design of the nitrogen-doped expanded graphite matrix and the in-situ silicon coating and mould pressing integrated forming process. By doping the nitrogen element in the expanded graphite, the wettability of the pole piece to an electrolyte can be improved, pores of the expanded graphite can be used as transmission channels of ions between graphite sheet layers, and then by utilizing a microscopic two-dimensional sheet structure of the expanded graphite and direct molding through mold pressing, efficient compounding of graphite and silicon is realized, and preparation of the negative pole piece is completed in one step. The breakthrough of the thickness of the pole piece reaches the magnitude of 1 mm (far exceeding the level of tens of microns of a traditional current collector), and meanwhile, the pole piece has high rate performance and excellent cycle stability. Wherein the three-dimensional structure maintains the integrity of the electrode through a mechanical interlocking effect, and the structure has certain elasticity, so that the structure of the material is kept stable in a repeated expansion / contraction process caused by charging and discharging, and the capacity retention ratio is remarkably improved.

There is provided a triboelectric nanogenerator which includes a negative electrode, a negative tribolayer, a positive tribolayer, and a positive electrode. The positive tribolayer and the positive electrode are made of the same material. The material is a surfactant-protected ionic conductive material.

The invention discloses a water-based compensation sodium source sodium ion battery positive pole piece and a preparation method thereof. Mixing a positive active material, a conductive agent, a water-based binder, a water-soluble sodium supplement agent and a solvent to obtain positive slurry; wherein the water-soluble sodium supplement comprises sodium nitrite, sodium oxalate and sodium citrate; the solvent is water; and coating the surface of a current collector with the positive electrode slurry to prepare the positive electrode plate. Deionized water is used for replacing a traditional organic solvent to serve as a pulping solvent, and dual-function optimization is achieved by adding a specific water-soluble sodium supplementing agent. The sodium supplementing agent is uniformly distributed in the pole piece through a dissolution-recrystallization mechanism, and an efficient sodium ion pre-compensation system is formed. According to the method, the production cost and the energy consumption are remarkably reduced, the structural degradation of the positive active material in a water system environment can be effectively inhibited, irreversible sodium loss caused by formation of a first-week solid electrolyte interface (SEI) of a negative electrode is counteracted through a sodium source compensation mechanism, and the method has remarkable environmental friendliness and industrial application value.

The invention provides a punching, laminating and thermal compounding all-in-one machine which comprises a positive electrode die-cutting machine, a positive electrode thermal compounding machine, a negative electrode die-cutting machine, a single-sided negative electrode die-cutting machine, a laminating machine, a laminated core hot-pressing detection machine and a laminated core tray loading and blanking machine, the positive electrode thermal compounding machine, the negative electrode die-cutting machine and the single-sided negative electrode die-cutting machine are respectively connected with the lamination machine, the lamination machine is connected with the laminated core hot-pressing detection machine, and the laminated core hot-pressing detection machine is connected with the laminated core tray loading and blanking machine. The production efficiency and the qualified rate of finished products are effectively improved; a plurality of pieces are formed at a time through die cutting by firstly cutting into one section and then positioning by a CCD (Charge Coupled Device), so that less waste is generated, and the die cutting precision of positive and negative pole pieces is high; the positive electrode thermal compounding machine adopts a flat pressing mode; the lamination machine adopts a one-time lamination mode, the lamination efficiency is high, the laminated core is subjected to pressure maintaining in the whole process, and the laminated core hot-pressing detection machine adopts a rotating disc type rubberizing mode.

The application discloses a coating system and a coating method. The coating system determines a target roll to be wound based on state parameters of each chuck in a winding device for clamping the roll; and controls the winding device to change the roll in order to wind the material by the target roll when it is determined that the current coating process parameters meet the roll changing condition. The state parameters of each chuck, the coating process parameters and the roll changing condition are used to automatically switch the winding device to wind the material by the target roll, thereby greatly improving the automation degree of roll changing.

The invention discloses a preparation method of a rate type sodium-ion battery pole piece and a sodium-ion battery, the sodium-ion battery pole piece comprises a positive pole piece and a negative pole piece, and the preparation method is characterized by comprising the following steps: S1, preparation of positive bottom layer slurry and positive top layer slurry, S2, preparation of negative bottom layer slurry and negative top layer slurry, and S3, preparation of a rate type sodium-ion battery pole piece. S3, double-chamber linkage coating, S4, three-section type gradient drying and S5, sectional type gradient rolling. The preparation method of the multiplying power type sodium ion battery pole piece and the sodium ion battery have the characteristics of high ion transmission efficiency, good volume stability, strong process applicability and excellent electrochemical performance.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a dry battery pole piece, a preparation method thereof and a battery comprising the pole piece, and the method comprises the following steps: S1, preparing a composite current collector; s2, preparing an electrode film: S21, preparing a positive electrode film, and S22, preparing a negative electrode film; s3, preparing a pole piece green body: sequentially laminating the positive electrode film, the composite current collector and the negative electrode film, and carrying out gradient pressure rolling at 120-180 DEG C, linearly increasing the pressure from 5-10MPa at the edge to 15-20MPa at the center, and controlling the rolling speed to be 1-3m / min, so as to form the pole piece green body; and S4, preparing the dry-method battery pole piece. The composite current collector adopts a three-layer substrate structure of a metal substrate layer, mesoporous carbon, an MOF composite transition layer and a conductive polymer transition layer, gradient pores are formed through laser drilling, and an AlO nano coating is deposited to enhance interface bonding.

The invention relates to the technical field of batteries, and particularly discloses a low-porosity solid-state battery negative electrode and a preparation method thereof.The negative electrode slurry of the negative electrode comprises a polymer electrolyte A and a small molecule mixture B. The polymer electrolyte A is obtained by polymerizing an acrylic acid monomer, an acrylonitrile monomer and a sulfydryl-containing monomer; the small molecule mixture B at least comprises a flexible chain segment, fluorinated acrylate, a lithium salt, a plasticizer and a free radical initiator. In-situ polymerization is carried out in the coating process of the small molecule mixture B to generate a self-adaptive pore polymer electrolyte so as to reduce pores, and the polymer electrolyte A not only can improve the conversion rate of in-situ polymerization of the small molecule mixture B, but also can interact with the small molecule mixture B to form a dynamic cross-linked network for improving the stripping force of the pole piece; under the synergistic effect, the negative electrode / solid electrolyte interface contact is optimized, and the problems of poor interface contact and large interface impedance between the negative electrode active material and the solid electrolyte of the existing solid-state battery are solved.

The invention relates to the technical field of lithium ion batteries, in particular to a negative plate, a battery and a preparation method of the battery. The negative plate comprises a negative current collector, a first coating layer and a second coating layer. The first coating layer is coated on the negative electrode current collector and takes a silicon-based negative electrode material as an active material; the second coating layer is coated on the surface of the first coating layer and takes a composite material of a porous carbon material and a fast ion conductor as an active material. By adding the fast ion conductor, the defect of low ionic conductivity of a silicon system material is improved, and an ion transmission channel is increased; and meanwhile, side reaction between the electrolyte and the silicon-based negative electrode is avoided, the interface impedance is reduced, and the risks of pole piece pulverization and lithium separation are reduced. The first coating layer is provided with the groove, and the second coating layer constructs a three-dimensional hard matrix protection barrier for the first coating layer, inhibits and buffers the volume expansion of the silicon material, slows down the capacity attenuation of the battery cell, and prolongs the cycle life of the battery cell. The invention also provides a battery and a preparation method thereof.

The invention relates to a sodium-sulfur battery technology, and aims to provide a preparation method and application of a modified carbon-supported sulfur electrode material and a self-supporting sulfur electrode. The preparation method comprises the following steps: carrying out spray drying on a mixed solution containing aniline hydrochloric acid, ammonium persulfate hydrochloric acid and nano calcium carbonate to obtain a precursor, and carrying out carbonization and acid leaching to obtain a hydrophilic carbon carrier with primary and secondary pore channels; a positive plate is prepared to assemble a soft package battery, and potassium intercalation is realized through multiple times of potassium deintercalation and intercalation cycle treatment; disassembling and cleaning to obtain a potassium-embedded carbon carrier, reacting with transition metal nitrate, and forming monatomic transition metal clusters between graphite layers to enlarge the graphite spacing; removing potassium nitrate to obtain a modified carbon carrier which is provided with three-stage mass transfer channels and in which transition metal is loaded, then grinding and mixing the modified carbon carrier with elemental sulfur, performing heating treatment, and cooling to obtain the modified carbon sulfur-loaded electrode material. According to the invention, transition metal single atomic clusters are formed on the walls of the micropores while the interlamellar spacing of the graphite is enlarged to form the micropores, so that the cycling stability of the sodium-sulfur battery is effectively improved.

A process for fabricating an electrode involves forming a solid layer of an electrode material on a surface of a solid current collector by compression molding. The electrode material contains a mixture of an electrically conductive graphite and a binder, the binder being a moldable polymer. A layer of an electrically insulating material is formed, for example by molding, on a surface of the layer of the electrode material so that a portion of the surface of the layer of the electrode material remains uncovered by the insulating material. An electrode fabricated by the process is preferably a charge cathode for an electrochemical cell.

The invention relates to the technical field of roller cleaning, in particular to a roller cleaning device of a negative electrode double-roller machine, which comprises two supporting side plates, the two supporting side plates are respectively mounted at two ends of an upper roller and a lower roller, and two cleaning mechanisms are arranged between the two supporting side plates. The two cleaning mechanisms are arranged on the upper roller and the lower roller and are used for cleaning dust on the upper roller and the lower roller respectively, each cleaning mechanism comprises an atomization spraying part, a scraping part, a wiping cloth belt, a transmission part and a drying part, the atomization spraying parts enable the surfaces of the rollers to be atomized and sprayed in advance, and the scraping parts scrape the surfaces of the atomized and sprayed rollers; according to the device, water stains containing dust are scraped, the rollers are wiped and cleaned again through the wiping cloth belt, and finally the rollers are dried through the drying piece, so that the two rollers are kept in a clean state to stably roll a negative electrode battery piece, and the production quality of the negative electrode battery piece is guaranteed.

This electrode sheet 20 comprises an electric current collector 18, and a mixture sheet 6 that is composed of a dry electrode mixture and laminated on the surface of the electric current collector 18. The mixture sheet 6 has a window portion 6b that is surrounded on all sides by the dry electrode mixture, the electric current collector 18 being exposed through the window portion 6b. In a cross-section that is orthogonal to the extension direction of the electric current collector 18 and the mixture sheet 6, the angle between a sidewall of the mixture sheet 6 and the surface of the electric current collector 18 is 75-105 degrees inclusive.

A punching system for an electrode base material, in which the electrode base material coated with an active material on a surface of a collector is molded or cut in a predetermined shape, comprises: an unwinder on which the electrode base material wound in the form of a roll is mounted and around which the electrode base material is unwound; a punching device disposed to be spaced a predetermined distance from the unwinder, the punching device being configured to mold or cut the electrode base material supplied from the unwinder in a predetermined shape; and a curl correcting device disposed between the unwinder and the punching device to inject or suction air onto a surface of the electrode base material while the electrode base material moves to the punching device so as to planarize the electrode base material. A punching method for an electrode base material, in which an electrode base material is molded or cut in a predetermined shape, comprises: a step of supplying the electrode base material wound around a unwinder to a punching device; and a step of monitoring whether warpage of the electrode base material occurs during movement of the electrode base material to the punching device to inject or suction air onto a surface of the electrode base material when the warpage occurs so as to planarize the electrode base material.

The embodiment of the invention provides a preparation method of a high-load electrode with a vertical pore channel structure and a battery, which comprises the following steps: grinding and premixing carbon fluoride and a conductive carbon material in proportion, adding a binder, carrying out high-speed ball milling to obtain fiberized powder, and rolling to prepare an electrode material, thereby obtaining the high-load electrode with the vertical pore channel structure. Compounding the carbon fluoride with a current collector through hot rolling to obtain a positive pole piece; and finally, carrying out laser pore-forming treatment on the positive pole piece to obtain the high-load carbon fluoride electrode with a vertical pore channel structure. The pore diameter of the pore channel structure is 10-100 [mu] m, the pore pitch is 1-10 times of the thickness of the electrode material, the pore depth is 50-100% of the thickness of the electrode material, the ion tortuosity of the electrode is effectively reduced and the ion transmission efficiency is improved by constructing a vertical pore channel, meanwhile, high-energy laser induces an in-situ defluorination reaction on the pore wall to generate a high-conductivity sp2 carbon phase, and the conductivity of the electrode is improved. And the limitation of sacrifice conductivity of a mechanical pore-forming technology is broken through.

The invention discloses a disposable thermal battery annular pole piece demolding device, and relates to the technical field of thermal battery pole piece processing, the disposable thermal battery annular pole piece demolding device comprises a mounting plate, the top of the mounting plate is provided with a shell assembly, and the bottom of the mounting plate is provided with a support member; the electric push rod is arranged in the shell assembly, and the telescopic end of the electric push rod is detachably connected with an adjustable material returning rod; the elastic material returning assembly comprises an outer sleeve, a push shaft, a bottom plug, an adjusting nut and a spring; when the thermal battery pole piece is demoulded, the top of the push shaft is always in a contact state with the bottom of the mould base under the elastic force action of the spring, so that the mould base continuously supports the thermal battery pole piece, namely, the pressure head and the mould base are always in a compressed state on the thermal battery pole piece; therefore, the thermal battery pole piece is prevented from being cracked or broken due to the fact that the bottom is in a suspended state in the demolding process, and the qualified rate of products is increased.

This invention discloses a method for preparing a self-supporting silicon-carbon electrode sheet, comprising the following steps: preparation of expanded graphite, nitrogen doping, pore formation, silicon composite, and molding. Its innovation lies in: through the porous design of the nitrogen-doped expanded graphite matrix, combined with in-situ silicon coating and integrated molding process, an integrated electrode sheet with a three-dimensional elastic conductive network is constructed. By doping expanded graphite with nitrogen, the wettability of the electrode sheet to the electrolyte can be improved. The pores in the expanded graphite can serve as ion transport channels between graphite layers. Then, utilizing the microscopic two-dimensional sheet structure of expanded graphite, direct molding is achieved to realize efficient composite of graphite and silicon and complete the preparation of the negative electrode sheet in one step. This results in a breakthrough electrode sheet thickness reaching the 1mm level (far exceeding the tens of micrometers level of traditional current collectors), while also possessing high rate performance and excellent cycle stability. The three-dimensional structure maintains electrode integrity through a mechanical interlocking effect, and the structure has a certain degree of elasticity, allowing the material to maintain structural stability during repeated expansion / contraction caused by charging and discharging, significantly improving capacity retention.

The application relates to the technical field of battery pole pieces, in particular to a pole piece composite continuous production equipment. The equipment comprises a first electrode film piece supply device, a second electrode film piece supply device, a foil unwinding and output device, a first composite device and a second composite device. The first electrode film piece supply device is used for production and output of a first electrode film piece; the second electrode film piece supply device is used for production and output of a second electrode film piece; the foil unwinding and output device is used for output of a foil; the first composite device is used for receiving the first electrode film piece and the foil, and compositing the first electrode film piece to a first side of the foil to obtain a single-side composite pole piece; and the second composite device is used for receiving the single-side composite pole piece and the second electrode film piece, and compositing the second electrode film piece to a second side of the foil to obtain a double-side composite pole piece.

Provided is a positive electrode for a lithium metal rechargeable battery, comprising: a current collector; a positive electrode active material layer formed on the current collector; and a polymer-containing coating layer disposed on the positive electrode active material layer; wherein the polymer-containing coating layer comprises an ion-conductive polymer including an alkylene oxide segment. The resulting battery, when paired with a lithium metal negative electrode and separator, offers enhanced mechanical stability and improved cycle performance, making it suitable for vehicle applications.