566results about "Impregnation manufacturing" patented technology

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 relates to a base membrane for a composite current collector based on SiO2 nano composite modification and a preparation method of the base membrane. Synergistic modified nano SiO2 is compounded with aluminum hypophosphite, montmorillonite and the like to form modified auxiliary particles, the modified auxiliary particles and PET master batches are subjected to blending extrusion, and meanwhile, the surface of the base membrane is coated with a modified coating containing nano SiO2, so that the composite current collector is obtained. The mechanical property, the thermal stability and the flame retardance of the base film are obviously improved.

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 invention provides a negative electrode active material and a preparation method thereof, a negative electrode for a sodium ion battery, the sodium ion battery and an electric device. The negative electrode active material comprises a nitrogen-doped carbon sphere matrix and manganese monoxide embedded into the nitrogen-doped carbon sphere matrix, the average particle size of the manganese monoxide is 1.5 nm to 2.5 nm. In the negative electrode active material, the quantum-dot-level MnO is embedded into the nitrogen-doped carbon sphere matrix, so that a tight embedded structure (non-surface loading) of the quantum-dot-level MnO and the nitrogen-doped carbon spheres can be realized, volume expansion when sodium ions are embedded and removed is effectively relieved, and an efficient electron / ion transmission channel is provided. Meanwhile, the quantum dot-level MnO has a larger specific surface area, and provides more adsorption sites with the nitrogen-doped carbon, so that the composite material shows a pseudocapacitance-dominated sodium storage behavior, and is endowed with ultrahigh rate capability and ultra-long cycle life.

The invention belongs to the technical field of lithium ion battery additive materials, and particularly relates to a high-compaction dispersion material and a preparation method thereof, and a high-compaction flexible positive pole piece, the high-compaction dispersion material comprises the following components by mass: 30-40 parts of a component A, 5-10 parts of a component B, 5-10 parts of a component C, and 40-60 parts of a solvent; wherein the component A comprises an unsaturated cyclic monomer, unsaturated polyether and a solution polymerization copolymer of an amine-containing monomer and a (methyl) acrylate monomer; the component B comprises a long-chain amine substance; the component C comprises organic ester; the high-compaction dispersion material, the preparation method thereof and the high-compaction flexible positive pole piece have the advantages of being excellent in dispersion performance, outstanding in softening effect, remarkable in pole piece compaction density improvement and the like, can have the two functions of dispersion and compaction improvement, reduces the production cost, improves the pole piece yield and has a good application prospect.

The invention belongs to the technical field of batteries, and particularly relates to a preparation method of coating slurry, a silver-carbon negative electrode plate, a preparation method of the silver-carbon negative electrode plate and a solid-state battery. Compared with the prior art, by controlling the agglomeration degree of the silver material in the negative electrode active coating, silver and carbon particles can be uniformly dispersed, and on the basis of avoiding the generation of lithium dendrites, attachment sites and spaces of the silver particles on the carbon particles are increased, so that the safety performance and the electrical performance of the battery are improved.

This case involves a base film for a composite current collector based on SiO2 nanocomposite modification and its preparation method. The present invention forms modified auxiliary particles by synergistically modifying nano-SiO2 with aluminum hypophosphite, montmorillonite, etc., and extrudes them together with PET masterbatch. At the same time, a modified coating containing nano-SiO2 is coated on the surface of the base film, which significantly improves the mechanical properties, thermal stability and flame retardancy of the base film.

The embodiment of the invention relates to a negative plate, a preparation method thereof and a battery, the negative plate comprises a current collector, and a first active material layer and a solid electrolyte layer which are arranged on at least one surface of the current collector, and the first active material layer is located between the current collector and the solid electrolyte layer; the first active material layer comprises a silicon-based material; the solid electrolyte layer comprises a three-dimensional network cross-linked product of polyethylene oxide and trimethylaluminum and inorganic lithium salt positioned in pores of the three-dimensional network cross-linked product. Therefore, the volume expansion of the first active material layer can be effectively inhibited through the solid electrolyte layer in the charging and discharging process, the stability of the SEI membrane is improved, the SEI membrane rich in lithium salt can be constructed, the desolvation of active ions is promoted, and the capacity, the cycling stability and the low-temperature performance of the battery can be further improved.

The invention discloses a preparation method and application of a ternary pole piece with a base coat of lithium iron phosphate, and relates to the technical field of battery materials. The lithium iron phosphate slurry and the ternary material slurry are coated on the surface of the positive electrode base foil, so that the safety and the electrochemical performance of the pole piece are improved. The lithium iron phosphate and the ternary material are used as active materials, an active substance layer is formed on the surface of the positive electrode base foil, the lithium iron phosphate has a stable olivine structure, the structure is not easy to collapse and decompose at a high temperature, the lithium iron phosphate is coated on the surface of the ternary material, a protective layer with high thermal stability is constructed, heat is prevented from being quickly transferred into the ternary material, and the thermal stability of the ternary material is improved. The structure change of the ternary material at high temperature is delayed; the ternary material is heated to expand in the charging and discharging process, the lithium iron phosphate priming coat has certain elasticity and buffering performance, stress generated in the thermal expansion process of the ternary material can be absorbed and dispersed, and structural damage caused by thermal expansion is reduced.

A method for manufacturing composite cathode particles based on a dual-coated ternary oxide for an electrochemical battery by a high speed rotation includes the steps of: placing a plurality of large NCM (lithium nickel manganese cobalt oxide) particles and a glass phase material into a first mixer for stirring by a first high speed rotation to form a plurality of glass-phase-layer-contained NCM particles; then mixing a plurality of small LLZO particles and the glass-phase-layer-contained NCM particles by a second high speed rotation of a second mixer to form a plurality of composite NCM particles; and then mixing the composite NCM particles, a plurality of first carbon nanotubes and a plurality of nanoscale amorphous carbons to form a plurality of carbon-material-contained positive electrode particles.

According to an aspect of the present invention, there is provided a method for manufacturing a secondary battery, the method including: preparing an electrode assembly in which electrodes and a separator are alternately laminated, and an adhesive is applied to the surface of at least one among the electrodes and the separator, thereby allowing the electrodes and the separator to adhere to each other; accommodating the electrode assembly in a battery case; injecting a gel polymer electrolyte composition into the battery case to impregnate the electrode assembly with the gel polymer electrolyte composition; and curing the gel polymer electrolyte composition, wherein the adhesive includes a first oligomer compound, the separator includes a porous substrate and ceramic coating layers disposed on both surfaces of the porous substrate, the ceramic coating layers include 92-100 wt % (exclusive of 100) of inorganic particles and 0-8 wt % (exclusive of 0) of a binder, and the gel polymer electrolyte composition includes a lithium salt, an organic solvent, a polymerization initiator, and a second oligomer compound.

The invention discloses a method for removing residual alkali on the surface of a high-nickel positive electrode material in a ternary lithium battery and application of the method, and belongs to the technical field of lithium ion battery positive electrode materials. After the lithium ion ternary positive electrode material is subjected to coating treatment, residual alkali compounds on the surface of the lithium ion ternary positive electrode material are remarkably reduced, and a coating material protection layer can be constructed on the surface of the lithium ion ternary positive electrode material in situ; therefore, an electrode / electrolyte interface structure is strengthened, side reaction and interface impedance are inhibited, and the specific discharge capacity and rate capability of the battery are remarkably improved. The method is simple and convenient in process and mild in condition, and has a good industrial application prospect.

Batteries, component structures and manufacturing methods, in particular including a glassy embedded battery electrode assembly having a composite material structure composed of interpenetrating material components including a porous electroactive network including a solid electroactive material, and a continuous glassy medium including a Li ion conducting sulfide glass, can achieve enhanced power output, reduced charging time and / or improved cycle life.

The invention belongs to the field of batteries, and particularly relates to a negative plate, a preparation method thereof and a lithium ion battery, the negative plate comprises a current collector and an active layer arranged on at least one side of the current collector; the active layer comprises a lower active layer close to the current collector and an upper active layer far away from the current collector; the true density of the active components in the lower active layer is 2.1-2.4 g / cm < 3 >; and the true density of the active component in the upper active layer is 1.8-2.2 g / cm < 3 >. According to the technical scheme, the defects existing in an existing lithium ion battery negative electrode coating process are overcome, the problems that the active substance loading capacity is limited, the cycle life is short, and the fast charging performance is poor are solved by optimizing the structural design of negative electrode double-layer coating, and the requirement of the market for a high-performance lithium ion battery is met.

Generally described, one or more aspects of the present disclosure relate to methods, systems, and devices related to a powder dispensing system, including a pair of calender rolls, a first conical hopper and a second conical hopper positioned above the pair of calender rolls, each hopper having a first temperature controlled fluidized section, a first flow control system in fluidic connection with the first temperature controlled fluidized section, and a second flow control system in fluidic connection with the second temperature controlled fluidized section, a vertical linear actuator configured to adjust a distance between the first conical hopper, the second conical hopper and the pair of calender rolls, and a horizontal linear actuator positioned between the first conical hopper and the second conical hopper.

The invention discloses a multi-layer structure lithium-free negative electrode, a preparation method and a solid lithium-free negative electrode battery, the multi-layer structure lithium-free negative electrode comprises a first material layer, a second material layer and a third material layer which are arranged in sequence, the first material layer is a conductive carbon layer, the second material layer is a compact lithium-loving metal or metal oxide layer, and the third material layer is a lithium-loving metal or metal oxide layer. The third material layer is a porous material layer containing Lewis acid sites. The lithium-free negative electrode with the multi-layer structure has a relatively good lithium-loving characteristic, and in the lithium removal process, the copper foil and the coating can keep relatively good structural integrity and maintain a good conductive network, so that the lithium removal reaction can be continuously and stably carried out; the lithium-loving metal layer can be alloyed with lithium to form a relatively low nucleation barrier; the porous material layer containing Lewis acid sites can be compounded with an electrolyte to form an ionic conductor, a stable lithium-loving SEI layer is formed, a large number of Lewis acid sites can effectively improve the lithium deposition morphology and regulate and control uniform deposition of lithium, finally uniform lithium deposition can be achieved, and the cycle performance of a lithium-free negative electrode is improved.

The invention relates to a double-fluorine-doped carbon composite sodium ferric sulfate positive electrode material and a preparation method and application thereof, the positive electrode material is hollow microsphere particles formed by using fluorine-doped inorganic carbon composite inorganic conductive carbon as a coating layer and coating a fluorine-doped sodium ferric sulfate bulk phase, and the inorganic conductive carbon is uniformly distributed in the positive electrode material. The invention also discloses a preparation method and application of the double-fluorine-doped carbon composite sodium ferric sulfate positive electrode material. A battery assembled by a positive electrode plate prepared from the positive electrode material is high in median voltage, good in electronic conductivity, high in median voltage and energy density, long in cycle and high in specific energy. The method is simple in process, short in production period, accurate in control, low in raw material cost and suitable for large-scale continuous production.

The embodiment of the invention provides a silicon-based negative electrode material and a preparation method thereof, a negative electrode plate and an all-solid-state battery. The silicon-based negative electrode material comprises spherical porous silicon and metal indium, and the metal indium completely fills pores of the spherical porous silicon and coats the surface of the spherical porous silicon to form a continuous coating layer. The technical problems that the internal structure of the battery is damaged and the interface contact fails due to serious volume expansion or shrinkage of the silicon-based negative electrode material in the charging and discharging process, so that the cycle performance of the all-solid-state battery is poor, and the interface contact can be maintained by high voltage are solved.

Generally described, one or more aspects of the present disclosure relate to systems, methods, and devices for trimming and peeling electrode films. The system can be integrated into a calender rolling system and can create multi-lane films with clean edge quality for lamination. The system can include a trimming device including a cutting device, and a material removing device positioned downstream from the cutting device, the material removing device including a scraper element, a support element positioned upstream from the scraper element, and a vacuum element.

According to the invention, a stable Zn negative electrode is realized by forming an in-situ constructed zinc-loving and hydrophobic interface through simple soaking, and a unique carbonyl functional interface layer is formed in situ by soaking zinc foil in a glyoxal solution. On the basis of strong electronegativity of carbonyl, obvious interaction can be generated on zinc ions. And moreover, the hydrophobicity of the Zn negative electrode is improved by the unique particle morphology formed in situ. Through reconstruction of a negative electrode interface by glyoxal, a contact angle result shows that the unique morphology of glyoxal formed on the surface of the Zn negative electrode can increase the hydrophobicity of the Zn negative electrode. Therefore, a compact granular unique morphology is formed in situ on the surface of the Zn negative electrode through simple soaking, so that the Zn negative electrode becomes hydrophobic, and side reactions such as hydrogen evolution and by-products at an electrolyte / electrode interface are slowed down. As a result, symmetric cells exhibit more than 3200 hours at 1 mA cm <-2 > and 1 mAh cm <-2 >. Various types of positive electrodes can be matched, and excellent cycling stability is realized; for example, when matched with a MnVO positive electrode, it can be stably cycled for 2000 times.

A sulfide all-solid-state battery and a method for forming an oxide electrolyte coated cathode is provided. The battery includes a nickel-based cathode, an electrolyte coating adhered to the nickel-based cathode, an anode, and a sulfide solid electrolyte. The nickel-based cathode includes LiNi1-x-y-zCoxMnyAlzO2. The electrolyte coating includes an inorganic oxide solid electrolyte including Li1+nAlnTi2−n(PO4)3 (LATP), where 1-x-y-z is greater than 0.2, x is greater than or equal to 0, y is greater than or equal to 0, and z is greater than or equal to 0, and where n is between 0.2 and 0.5. The sulfide solid electrolyte transports charged ions between the anode and the nickel-based cathode.

The invention provides lithium ion negative electrode slurry based on a mesoporous alumina composite conductive agent, a lithium ion negative electrode plate and a preparation method, and belongs to the technical field of lithium ion batteries. The lithium ion negative electrode slurry comprises 95-97 parts by mass of graphite; 0.5 to 1.5 parts by mass of a composite conductive agent; 0.2 to 0.4 part by mass of sodium carboxymethyl cellulose; 1.3 to 1.7 parts by mass of polyacrylic acid; 0.4 to 0.6 part by mass of styrene butadiene rubber; wherein the composite conductive agent comprises carbon black and mesoporous alumina, and the mesoporous alumina and the carbon black form an ion-electron bicontinuous channel, so that transmission obstruction of lithium ions between a negative electrode and an electrolyte can be reduced, damage of a graphite structure in battery circulation can be inhibited, and falling and pulverization of graphite particles can be reduced; therefore, the effect of improving the negative electrode material is achieved.

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 disclosure provides a composite negative electrode sheet and a use thereof in a solid-state battery. The composite negative electrode sheet comprises a silicon active material and a metal compound, and in the process of silicon lithiation, a ternary Zintl phase Li-M-Si and an ionic conductive phase lithium compound are formed, wherein the mass ratio of the metal compound to the silicon active material is 5%-30%. According to the technical solution, by compounding the silicon active material with the metal compound, the ternary Zintl phase Li-M-Si can be formed in situ within a silicon-based negative electrode. The ternary Zintl phase has a stable structure, which can alleviate the volume expansion problem of silicon and enhance cycle stability. In addition, the lithium compound is formed to act as an ionic conductive phase, accelerating ion transport, enhancing lithium-ion transport kinetics, and improving the rate performance of batteries.

The present invention relates to a method for manufacturing a zinc negative electrode of a zinc-ion secondary battery and a zinc-ion secondary battery, the method comprising: a step of forming an artificial coating layer on the surface of a zinc negative electrode by a chemical reaction performed by immersing zinc metal in an inorganic metal salt solution; and a washing and drying step. The present invention can provide a negative electrode of an aqueous zinc-ion secondary battery, which is a safe and eco-friendly next-generation battery for an electric vehicle and an ESS, and a method for manufacturing same.

The electrode piece includes a current collector, an active substance layer, a first insulating layer and a second insulating layer, where the current collector includes a main body part and a tab, the tab extends from a first end of the main body part, the first end is an end of the main body part in a first direction, the main body part includes a coating area and a transition area, and the transition area is arranged between the coating area and the tab; the active substance layer is arranged on a surface of the coating area; the first insulating layer is arranged on an end face of the main body part at the first end; and at least a part of the second insulating layer is arranged on a surface of the transition area, the second insulating layer includes a thermoplastic polymer and an organic binder.

The present application provides a carbon-coated current collector containing a lithium replenishment coating layer, a method for manufacturing the same, and a lithium battery, which belongs to the technical field of lithium battery materials. [Solution] A method for manufacturing a carbon-coated current collector containing a lithium-replenished coating layer includes chemically etching a current collector substrate to embed a lithium-replenished material therein to form a lithium-replenished coating layer, and then applying a conductive carbon coating layer slurry to the surface of the lithium-replenished coating layer to form a conductive carbon coating layer. By chemically etching a current collector substrate to attach a lithium-replenished coating layer and then attaching a conductive carbon coating layer, the surface tension of the current collector can be improved, which is advantageous for the application and attachment of an electrode active material. At the same time, the introduction of the conductive carbon coating layer reduces the contact resistance between the electrode active material and the current collector, improving the usage consistency of lithium battery packs and significantly reducing the cost of lithium battery packs.

A positive electrode active material, a method for preparing the positive electrode active material, and a rechargeable lithium battery including the positive electrode active material are disclosed. The method for preparing a positive electrode active material may include pulverizing a carbon-based raw material to prepare carbon-based fine powder, mixing a lithium metal composite oxide and the carbon-based fine powder to prepare a mixed powder, and applying rotation to the mixed powder to form or provide a carbon-based coating layer on a particle surface of the lithium metal composite oxide. The average particle diameter of the carbon-based fine powder may be about 10 nm to about 100 nm. The applying of the rotation may include applying rotation of about 1,000 rpm to about 6,000 rpm for about 2 minutes to about 10 minutes.

The invention relates to the technical field of lithium ion batteries, in particular to an ultrahigh-nickel ternary positive electrode material as well as a preparation method and application thereof. The preparation method of the ultrahigh-nickel ternary positive electrode material provided by the invention comprises the following steps: mixing a first vinyl polymer, a precursor, a metal oxide and a solvent to obtain a spinning solution A; mixing a second vinyl polymer, a lithium source and a solvent to obtain a spinning solution B; respectively depositing the spinning solution A and the spinning solution B by adopting an opposite electrostatic spinning technology to obtain a film-shaped material, and sintering to obtain a matrix material; and coating the surface of a base material by a wet method to prepare a fast ion conductor coating layer, and carrying out second sintering to obtain the ultrahigh-nickel ternary positive electrode material. According to the method provided by the invention, the agglomeration phenomenon of the ultra-high nickel positive electrode material in the sintering process is effectively reduced, so that the lithium ion battery containing the ultra-high nickel ternary positive electrode material has relatively high capacity and excellent cycle performance.

The invention discloses a pretreatment method for a negative pole piece of an aqueous zinc ion secondary battery, which comprises the following steps: preparing a treatment solution composed of deionized water, an alcohol organic matter and zinc tetrafluoroborate, immersing a zinc foil into the treatment solution, standing for 1-3 days, taking out, washing and drying to obtain the surface-modified zinc negative pole piece. The invention provides a pretreatment process for applying the functionalized electrolyte to the zinc negative electrode for the first time, so that active and controllable modification of a zinc negative electrode interface is realized, and the uncontrollability of a self-formed interface traditionally depending on a first cycle is avoided. A uniform and compact interface layer is formed on the surface of the zinc negative electrode pretreated through the method, zinc dendrite growth and side reactions such as hydrogen evolution and corrosion are effectively inhibited, the coulombic efficiency is remarkably improved, and the cycle life is remarkably prolonged. The method has the advantages of simple process, cheap raw materials, no need of complex equipment, easiness in integration with an existing battery production line, compatibility of treating fluid components with a conventional aqueous electrolyte, no influence on subsequent normal operation of a battery, and good industrial application prospect.