5275results about "Active material electrodes" patented technology

Embodiments described herein relate generally to systems and methods for continuously and / or semi-continuously manufacturing semi-solid electrodes and batteries incorporating semi-solid electrodes. In some embodiments, the process of manufacturing a semi-solid electrode includes continuously dispensing a semi-solid electrode slurry onto a current collector, separating the semi-solid electrode slurry into discrete portions, and cutting the current collector to form a finished electrode.

A protective structure for use with metallic lithium (or other alkali or alkali earth metals) and its method of manufacture are provided. The protective structure may include a substantially continuous and substantially nonporous buffer layer disposed on the metallic lithium layer which is conductive to lithium ions. A substantially continuous and substantially nonporous protective layer may be disposed on the buffer layer.

Embodiments described herein relate generally to systems and methods for continuously and / or semi-continuously manufacturing semi-solid electrodes and batteries incorporating semi-solid electrodes. In some embodiments, the process of manufacturing a semi-solid electrode includes continuously dispensing a semi-solid electrode slurry onto a current collector, separating the semi-solid electrode slurry into discrete portions, and cutting the current collector to form a finished electrode.

The invention provides a zinc negative electrode and gel electrolyte integrated structure and a preparation method thereof and a zinc ion battery, the integrated structure comprises a zinc negative electrode and a gel electrolyte layer combined on the surface of one side or two sides of the zinc negative electrode in situ, the gel electrolyte layer comprises a polymerization product of a zinc acrylate monomer, an acrylic monomer and a gel substance, the zinc ion battery has the advantages of no anion interference, high ionic conductivity, excellent contact with a zinc negative electrode and the like, can be applied to the field of batteries, and can effectively avoid an electrode concentration polarization effect, enhance the desolvation capability of zinc ions and prolong the cycle life of the batteries. The preparation method comprises the following steps: arranging a mixed raw material solution containing a zinc acrylate monomer, an acrylic monomer and a gel substance on the surface of the zinc negative electrode, and carrying out ultraviolet polymerization to generate a single-ion conductive dual-network polymer, namely the gel electrolyte layer, on the surface of the zinc negative electrode in situ. The method is suitable for industrial production.

The invention provides a carbon-coated lithium-containing phosphate positive electrode material and a preparation method thereof, a positive electrode plate and a lithium ion battery, and relates to the technical field of lithium ion batteries. Particles of the carbon-coated lithium-containing phosphate positive electrode material provided by the invention have a composite structure, the composite structure comprises a lithium-containing phosphate inner core and a carbon coating layer at least partially coating the lithium-containing phosphate inner core, a carbon source of the carbon coating layer is pre-sintered carbon, and Ig / Id of the carbon coating layer is greater than or equal to 1. The carbon-coated lithium-containing phosphate positive electrode material has the advantages of good conductivity, few surface functional groups, small specific surface area and the like, is beneficial to exerting the capacity of a lithium ion battery, and can improve the electrochemical performance and the cycle performance of the lithium ion battery.

The embodiment of the invention provides a pole piece, a battery monomer, a battery, electric equipment and a preparation method of the pole piece, the problem of powder falling of the pole piece to be cut in the cutting process can be effectively improved, so that the risk of internal short circuit of the battery monomer caused by lap joint of a positive pole piece and a negative pole piece is reduced, and the yield of the battery monomer is further improved. The pole piece comprises a first current collector, the first current collector comprises a first body and a tab area connected to the edge of the first body, and the first body comprises a coating area and an edge area; the first conductive layer is arranged on the surface of the coating area; wherein the thickness of the pole piece in the edge area is smaller than that of the pole piece in the coating area.

The invention provides a composite current collector, a pole piece, a secondary battery and an electric device. The composite current collector comprises a base material layer, a first filler, a bonding layer and a conductive layer, the bonding layer is located between the base material layer and the conductive layer, one end of the first filler is embedded into the base material layer, the other end of the first filler is embedded into the bonding layer, the hardness of the first filler is larger than that of the base material layer, and the hardness of the first filler is larger than that of the bonding layer. According to the composite current collector, the first filler with the hardness larger than that of the base material layer and the bonding layer is introduced, one end of the first filler is embedded into the base material layer, the other end of the first filler is embedded into the bonding layer, the first filler can serve as an acting point between the base material layer and the bonding layer, and the elastic modulus of the composite current collector can be improved; and the risk of wrinkling in the pole piece processing process is reduced.

The invention provides a preparation method of a lithium manganese iron phosphate material, and relates to the technical field of positive electrode materials. The preparation method of the lithium manganese iron phosphate material comprises the following steps: mixing a first raw material component consisting of ferromanganese oxalate, a first lithium source, a first phosphorus source, a first carbon source and a first doping agent, adding deionized water, grinding, and then carrying out spray drying to obtain a precursor A; mixing a second raw material component consisting of carbon-coated ferromanganese oxalate, a second lithium source, a second phosphorus source, a second carbon source and a second doping agent, adding deionized water, grinding, and performing spray drying to obtain a precursor B; and uniformly mixing the precursor A and the precursor B, sintering in an inert atmosphere, and crushing to obtain the lithium manganese iron phosphate material. According to the lithium manganese iron phosphate material, on the premise of ensuring high specific capacity, relatively high compaction density and relatively high rate capability are realized at the same time.

The utility model relates to an electrode assembly and a battery monomer adopting the same, the electrode assembly consists of a positive plate, a negative plate and a diaphragm, the electrode assembly is provided with a positive lug and a negative lug, and the size of the negative plate is larger than that of the positive plate; the corner of the positive plate is an inner arc angle; the corner of the negative plate is an outer arc angle; the positive plates and the negative plates are stacked in sequence, and the diaphragms are arranged between the adjacent positive plates and negative plates. The corner of the negative plate is designed to be the outward arc angle, and the corner of the positive plate is designed to be the inward arc angle, so that the aluminum plastic film PP layer is effectively prevented from being scratched in the stacking and packaging processes of the electrode plates. According to the design, the stacking mode of the electrode plates is improved, the possibility of physical interference is reduced, and meanwhile, the reduction of loss in the battery assembly process is also facilitated.

The invention relates to a high-load composite iodine positive electrode based on an MXene electrochemical reaction regulator as well as a preparation method and application of the high-load composite iodine positive electrode. The high-loading-capacity composite iodine positive electrode comprises a porous self-supporting composite electrode film and an iodine active substance, wherein the porous self-supporting composite electrode film is formed by wrapping a carbon material with an MXene / cellulose network formed by mixing an MXene nanosheet, the carbon material and cellulose, and the iodine active substance is loaded on the porous self-supporting composite electrode film; wherein the iodine active substance comprises I <-> ions and I2; the MXene nanosheet is at least one of Ti < 3 > C < 2 > T < x >, Nb < 2 > T < x >, Mo < 2 > T < x > and V < 2 > T < x >.

The invention provides a battery cell and electric equipment, the battery cell comprises an electrode assembly, the electrode assembly is formed by winding a positive pole piece, a diaphragm and a negative pole piece which are stacked, and the outermost circle of pole piece is the positive pole piece; the positive pole piece comprises a double-sided coating area, a single-sided coating area and a double-sided empty foil area which are sequentially arranged from the winding starting end to the winding ending end; the first adhesive tape of the battery cell is attached to one side, which is not provided with the active material layer, of the single-side coating area, and at least part of the first adhesive tape is arranged on a second circle of positive pole piece of the battery cell from outside to inside; in the winding direction, the first gummed paper exceeds the first edge, away from the single-face coating area, of the double-face empty foil area; and the first gummed paper exceeds the second edge and the third edge of the double-sided empty foil area along the winding axis direction. And the capacity of the battery core is less than 3Ah. The possibility of short circuit caused by contact between the edge of the double-sided empty foil area and the negative pole piece is reduced, and the safety of the battery cell is improved; and the first gummed paper does not increase the thickness of the battery cell, so that the energy density of the battery cell can be improved.

The invention discloses a zinc negative electrode and a preparation method and application thereof. The zinc negative electrode comprises a polycatechol coating; and the thickness is 10 nm to 1 [mu] m. The method has the advantages of being green, environmentally friendly and low in cost. Catechol has zinc affinity and can be stably combined with zinc metal to form an ultrathin protection layer, compared with other organic matter coating methods (the process is complex and raw materials are expensive), the method is simpler and rapider, no binder or expensive medicine is needed, the zinc foil only needs to make contact with a modified solution for a certain time, practicability is high, and the method is suitable for large-scale production. The application prospect of large-scale continuous preparation is realized. The added oxidizing agent has the function of accelerating reaction, other metal ions can be introduced to be chelated with catechol, the deposition behavior of zinc ions is further optimized and regulated, and the battery performance is improved. The cycle life of the modified zinc negative electrode battery can reach more than 500h.

A method of synthesis of single crystal nickel-rich cathode materials can include preparing a precursor solution by dissolving lithium nitrate, nickel nitrate, manganese nitrate, and cobalt nitrate in water, aerosolizing the solution of a) in a stream of air using an ultrasonic sprayer, preheating the resulting droplets, premixing the droplets with methane, decomposing the droplets by passing through a co-flow burner, depositing solid particles on a filter, and calcinating the solid particles in a furnace in oxygen to produce a single crystal cathode material.

A silicon-carbon composite of the present invention comprises a lithium silicon composite oxide and carbon, wherein the lithium silicon composite oxide includes silicon particles, silicon oxide, magnesium silicate, and a lithium silicon compound. By comprising two or more carbon layers including a first carbon layer and a second carbon layer, the silicon-carbon composite can improve the performance of a secondary battery, such as slurry stability and initial charge / discharge characteristics, when used as a negative electrode active material of the secondary battery. In addition, the first carbon layer and the second carbon layer of the silicon-carbon composite satisfy specific thickness ranges, and thus, the silicon-carbon composite can further improve the performance of a secondary battery, such as capacity, cycle characteristics, and initial charge / discharge characteristics, when used as a negative electrode active material of the secondary battery.

The invention relates to a preparation method of a nickel ion doped modified ferric sodium pyrophosphate positive electrode material, and belongs to the technical field of sodium ion battery positive electrode materials. The nickel ion doped modified ferric sodium pyrophosphate positive electrode material is prepared by adopting an integrated process system of liquid phase uniform mixing, spray granulation and precise segmented calcination. According to the process system, atomic-scale uniform doping of nickel ions and a specific microstructure of a precursor are realized through spray drying, and a plurality of inherent key technical problems of low electronic conductivity, low ion diffusion rate, impurity phase generation and the like of an NFPP material are solved together through a synergistic effect with a subsequent calcining process; furthermore, the discharge capacity of the ferric sodium phosphate pyrophosphate composite material at high rate is improved, so that the battery has relatively high cycling stability.

The invention discloses preparation and application of an organic-inorganic interface layer modified zinc negative electrode. The preparation method comprises the following steps: firstly, dispersing organic polymer polylactic acid and zinc sulfide powder into tetrahydrofuran, then coating the surface of zinc foil with the dispersed solution, and drying a solvent at 70 DEG C, so as to prepare the zinc negative electrode modified by an organic-inorganic interface layer. According to the interface layer, zinc ion deposition is regulated and controlled, and the problem of zinc dendrite growth is solved. In addition, the polylactic acid-zinc sulfide composite coating can effectively improve the redox kinetics of zinc ions and improve the coulombic efficiency of the zinc negative electrode. Due to the good ionic conductivity, the interface modification layer can improve diffusion of zinc ions, and the polarization influence caused by the concentration gradient of the zinc ions is relieved. Therefore, the prepared polylactic acid-zinc sulfide composite interface layer modified zinc negative electrode symmetric battery has more excellent cycling stability, the half battery has more stable coulombic efficiency, and the assembled total battery has more prominent capacity retention rate.

The present invention provides a lithium secondary battery comprising: a positive electrode; a negative electrode; a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material, the positive electrode active material includes an overlithiated manganese-rich oxide containing at least 50 mol% of Mn among all metals other than lithium and having a molar ratio of lithium to transition metals of greater than 1, and the non-aqueous electrolyte contains a lithium salt, a compound represented by chemical formula 1, and a compound represented by chemical formula 2.

The invention relates to the technical field of batteries, and provides a pole piece, a battery cell, a battery pack and a pole piece design method. The pole piece comprises a main body part and a pole lug, the main body portion is configured to be wound to form a winding core. The main body portion has a winding start end and a winding stop end. The direction from the winding starting end to the winding ending end is the winding direction. And the at least two tabs are arranged on one side of the main body part at intervals along the winding direction. And in the winding direction, the heights of the tabs at the odd number positions and the heights of the tabs at the even number positions have opposite gradual change tendencies. Therefore, the integrity of the welding marks can be ensured, and the phenomena of tab tearing and the like caused by interference can be avoided.

The invention discloses a pole piece and a preparation method thereof, a battery and a power utilization system. The pole piece comprises a current collector and an active material layer which are arranged in a laminated manner, the active material layer comprises a plurality of active particles, and the active material layer is further provided with first pores and second pores; the aperture R1 of the first pores and the aperture R2 of the second pores meet the following conditions: 0.05 * D50 < = R1 < 0.65 * D50, 0.65 * D50 < = R1 < = 10 * D50, D50 is the median particle size of the plurality of active particles, and the unit of R1 and R2 is nm. Through the pore distribution structure with matched size, the wettability of the electrolyte in the active material is improved, so that the migration path of ions in the pole piece is optimized, the overall internal resistance of the battery is reduced, and the power performance, the fast charging performance and the low-temperature performance of the pole piece are further improved on the basis of improving the ion mobility.

An exemplary embodiment of the present disclosure provides a rechargeable battery electrode (11, 12, 700, 701, 703, 704) including: a substrate (70) configured to have a first pressurized region and a second pressurized region; and an active material layer (71, 72, 73, 74, 75, 76, 77) configured to have a first portion (D1) formed in the first pressurized region and a second portion (D2) formed in the second pressurized region, wherein a thickness of the first portion (D1) is thicker than a thickness of the second portion (D2).

A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.

Disclosed is a cylindrical battery, which includes an electrode assembly; a battery housing configured to accommodate the electrode assembly through an open portion; a current collecting plate having a support portion, an uncoated portion coupling portion coupled to the first uncoated portion, and a housing coupling portion electrically connected to the battery housing; a cap plate covering the open portion; an electrode terminal riveted through a perforated hole formed in a closed portion of the battery housing and electrically connected to the second uncoated portion; and an insulating gasket interposed between the electrode terminal and the perforated hole, wherein the electrode terminal includes a body portion; an outer flange portion; an inner flange portion; and a flat portion provided on an inner side of the inner flange portion.

The invention discloses a composite positive electrode of an aqueous zinc battery, a preparation method of the composite positive electrode and the aqueous zinc battery, and belongs to the field of secondary batteries. Comprising a current collector and a conductive polymer, the conductive polymer is deposited on the current collector; the conductive polymer is selected from at least one of polypyrrole and derivatives thereof, polythiophene and derivatives thereof, and polyaniline and derivatives thereof. The composite positive electrode of the aqueous zinc battery has high conductivity and excellent stability, and the aqueous zinc battery assembled by the composite positive electrode has high specific capacity and good cycle performance.

There is provided a 3D printed metal component having a metal body and an internal cavity within said metal body, the component comprising a 3D printed electrode within the internal cavity, the 3D printed electrode having lower density than the metal body.

The invention discloses a natural polysaccharide assisted MXene porous membrane electrode and a preparation method thereof, and relates to the technical field of electrodes. According to the technical scheme, hydrochloric acid and lithium fluoride are used for carrying out etching and intercalation on an MAX raw material, and MXene dispersion liquid is obtained; mixing the MXene dispersion liquid with a metal ion solution to obtain a metal ion doped MXene solution; mixing the metal ion doped MXene solution with a natural polysaccharide dispersion liquid to obtain a natural polysaccharide modified MXene dispersion liquid; mixing the natural polysaccharide modified MXene dispersion liquid with a template substance, performing vacuum filtration, and performing vacuum drying to obtain a flexible MXene film; and carrying out template substance removal treatment on the flexible MXene film to obtain the natural polysaccharide-assisted MXene porous film electrode. According to the invention, the stacking problem of the MXene material is solved, and the electrochemical performance of the natural polysaccharide-assisted MXene porous membrane electrode is obviously improved.

A cylindrical secondary battery and an electronic device. The cylindrical secondary battery comprises a negative electrode sheet, the negative electrode sheet comprises a negative electrode current collector and a negative electrode material layer located on at least one surface of the negative electrode current collector, and the negative electrode material layer includes a first negative electrode material layer and a second negative electrode material layer. The first negative electrode material layer is located between the negative electrode current collector and the second negative electrode material layer, the first negative electrode material layer and the second negative electrode material layer each comprise a silicon-based material, and based on the mass of the negative electrode material layer, the mass percentage content of the element Si in the first negative electrode material layer is greater than the mass percentage content of the element Si in the second negative electrode material layer. The second negative electrode material layer is provided with a plurality of stripes, the plurality of stripes extend in the width direction of the negative electrode sheet when the negative electrode sheet is unfolded, and the plurality of stripes are arranged at intervals in the length direction of the negative electrode sheet when the negative electrode sheet is unfolded. By means of the described configuration, an electrolyte has good wetting performance on the negative electrode sheet, and the cylindrical secondary battery has good lithium precipitation performance and cycle performance.

The embodiment of the invention provides an energy storage device with conductive polymer sponge and an intelligent monitoring system of the energy storage device, and belongs to the field of electrochemistry, the energy storage device comprises a shell, and an electrode assembly, electrolyte and a current collector which are arranged in the shell; the electrode assembly comprises a positive electrode, a negative electrode and a diaphragm arranged between the positive electrode and the negative electrode, and the positive electrode and the negative electrode are composite electrodes of conductive polymer sponge; the conductive polymer sponge is a polymer sponge which is prepared through an in-situ chemical oxidation polymerization technology and has a porous network, and the energy storage device further comprises a control system used for controlling the operation state of the energy storage device. According to the embodiment of the invention, the polymer sponge with a highly interconnected porous network is prepared through an in-situ chemical oxidation polymerization technology on the basis of a unique microstructure of the conductive polymer sponge, and the three-dimensional structure of the polymer sponge increases the effective surface area of an electrode and improves electrochemical reaction active sites, so that more efficient charge transmission and storage are realized.

The present invention discloses an aqueous zinc-ion battery, comprising: a positive electrode sheet, a negative electrode sheet and an electrolyte. The positive electrode material of the positive electrode sheet is a layered vanadium-based positive electrode material. Since cations and water molecules are inserted into the layers of vanadium pentoxide, the interlayer spacing is increased and the structure of the host material is supported and stabilized. Therefore, the fast and reversible insertion and extraction performance of charge and discharge ions can be improved, and the high rate and long cycle life of the layered vanadium-based positive electrode material can be achieved. The negative electrode sheet is a zinc foil with a surface coating. By defining the thickness of the surface coating to be 100 nm to 20 μm, the surface coating can prevent the zinc foil from directly contacting the electrolyte, and zinc will be deposited between the coating and the zinc foil during the charge and discharge process. In this way, the direct contact between zinc and the electrolyte is avoided, which helps to solve problems such as dendrites, corrosion and hydrogen evolution of the zinc negative electrode. Compared with the traditional aqueous zinc-ion battery, the electrochemical performance of this aqueous zinc-ion battery is enhanced.

The invention discloses a porous silicon-carbon negative electrode material of a lithium ion battery as well as a preparation method and application of the porous silicon-carbon negative electrode material. The preparation method comprises the following steps: firstly, activating silicon nanoparticles by using a surfactant, so that the silicon nanoparticles are positively charged, and agglomeration of the silicon nanoparticles is avoided; secondly, nano active silicon and graphite are uniformly mixed and ball-milled, so that the active silicon is anchored in a graphite layer, and the conductivity of the whole material is improved; and uniformly mixing and ball-milling the silicon / graphite composite material, asphalt and potassium chloride, and then annealing and washing to obtain the porous silicon-carbon composite material. The activated nano silicon can effectively prevent agglomeration of nano silicon particles, the porous carbon prepared by taking potassium chloride as a template agent has the characteristics of environmental protection and no pollution, the potassium chloride can be recycled, and the prepared porous silicon carbon negative electrode material can enable a lithium ion battery to have relatively high initial coulombic efficiency and excellent cycling stability.