253results about "Primary cell electrodes" patented technology

The invention discloses a preparation method of a high-specific-power manganese dioxide-carbon fluoride battery positive pole piece. The preparation method comprises the following steps: (1) carrying out high-temperature heat treatment on electrolytic manganese dioxide to finish crystal transformation of the electrolytic manganese dioxide; (2) carrying out ball milling on the manganese dioxide, the carbon fluoride and the conductive agent which are subjected to heat treatment to obtain a composite substance of the manganese dioxide, the carbon fluoride and the conductive agent; (3) stirring and mixing the composite substance with a binder, a surfactant and deionized water to form manganese dioxide-carbon fluoride battery positive electrode slurry; and (4) coating the prepared positive electrode slurry on an aluminum mesh with a certain surface density in an extrusion or roller coating manner, and carrying out drying and rolling processes to obtain the high-loading-amount manganese dioxide-carbon fluoride battery positive electrode plate with a certain compaction density and surface density. The prepared positive pole piece has relatively high conductivity and energy density, and the high-magnification application scene of the lithium manganese dioxide-carbon fluoride battery is further widened.

The invention provides a preparation method of a positive electrode of a high-temperature-resistant lithium primary battery, which comprises the following steps: uniformly mixing a positive electrode active material, a positive electrode additive, a conductive agent and an adhesive, and preparing a positive electrode plate by a lithium primary battery positive electrode processing technology; the positive electrode active material comprises sintered manganese dioxide; the positive electrode additive is a boron-containing magnesium compound; the mass ratio of the positive electrode active material to the boron-containing magnesium compound is 1: (0.005-0.1). According to the invention, the boron-containing magnesium compound is directly introduced into the positive electrode of the lithium primary battery as a source of boron element and magnesium element, so that a mixing step does not need to be additionally added before sintering, the preparation process is reduced, and the labor and equipment cost is reduced; in addition, after the produced battery is stored at 125 DEG C for 100 hours, the CCV of the battery and the expansion of the battery are smaller.

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.

To provide a sheet-like lithium primary battery having an excellent storage characteristic, and a manufacturing method for the same.SOLUTION: A sheet-like lithium primary battery of the present invention, is formed by housing a negative electrode, a positive electrode, a separator, and a non-aqueous electrolyte that contain a lithium or a lithium alloy in an outer casing constructed by a laminate film having a heat deposition resin layer. A volume of a gas increased in a battery when it is stored for 30 days under an atmosphere of 70°C and 90% of a relative humidity, and is 20% of a content volume in the battery before the storage. A manufacturing method of the sheet-like lithium primary battery of the present invention, includes: a temporal sealing step of sealing a power generation element in an outer housing; a preparation discharge step of discharging one part of a capacitance provided in a temporal assembly; a storage step of holding the temporal assembly in a heating state; a degasification step of opening a part of the outer casing after that, and removing a gas in an inner part; and a main sealing step of sealing the outer casing after the degasification step.SELECTED DRAWING: Figure 4

To provide a zinc fuel which can be manufactured by regeneration of zinc oxide, is easy to handle and store, and is easy to secure contact with a current collector, and to provide its manufacturing method.SOLUTION: The zinc fuel 2 has a granular support 3 whose surface is formed of a current collector 5, and a negative electrode active material layer 4 covering the surface of the support 3. The negative electrode active material layer 4 is a generated zinc layer formed by dendritic crystals of zinc or a zinc alloy deposited on the surface of the support 3, in which some of the dendritic crystals are crushed and densified, and voids are provided between the crushed dendritic crystals. The zinc fuel 2 is manufactured by a method in which a granular support 3 at least the surface of which is formed of a current collector is put in a barrel 54, and dendritic crystals of zinc or zinc alloy are deposited on the surface of the support 3 by electrolysis of zinc oxide while rotating the support 3 in an electrolytic solution.SELECTED DRAWING: Figure 3

Provided in the present application are a button lithium primary battery and a preparation method therefor, and an electronic device. The button lithium primary battery comprises a battery casing (10) and a battery cell assembly located inside the battery casing (10), wherein the battery cell assembly comprises a negative electrode (3), a negative-electrode modification membrane (4), separators (5, 6) and a positive electrode (7), which are sequentially stacked; a recess (9) is provided on the surface of the side of the negative electrode (3) that is close to the negative-electrode modification membrane (4); and the negative-electrode modification membrane (4) is tightly embedded in the recess (9). By means of optimizing the structure and the material of the button lithium primary battery in the present application, the button lithium primary battery has an excellent discharge performance, and good levels of stability and reliability.

A lithium primary battery including: a positive electrode; a negative electrode; a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte solution, in which the positive electrode contains a positive electrode active material and a conductive material, the positive electrode active material contains at least one of manganese dioxide and graphite fluoride, the conductive material contains carbon black, the carbon black contains a metal element in an amount of 0.02 atomic % or more and 0.4 atomic % or less, the negative electrode contains a lithium alloy, the lithium alloy contains magnesium, and the content of the magnesium in the lithium alloy is 0.01 mass % or more and 11 mass % or less.

The application relates to the field of batteries, and discloses a battery cell and a battery pack. The battery cell comprises a pole group, the pole group comprises a second pole piece, a first pole piece and a separation film, the first pole piece comprises a first current collector and a first active material layer, one of the first pole piece and the second pole piece is a positive pole piece, and the other is a negative pole piece; the first pole piece comprises a main body part and a thinned part, the thickness of the thinned part is smaller than that of the main body part, the thinned part is connected to one end of the main body part in the width direction of the first pole piece; the first active material layer located in the main body part is provided with a plurality of grooves, the plurality of grooves are arranged at intervals in the length direction of the first pole piece, and each groove extends in the width direction; in the thickness direction, the depth of the groove is D, the thickness of the first active material layer located in the main body part is T1, and 15%<=D / T1<=50% is satisfied. The application can improve the infiltration effect and improve the cycle performance.

The invention discloses a negative electrode material comprising an electrochemically active material and a coating layer on the surface thereof. The coating layer comprises a coating material based on a lithiophilic calcined organometallic structure comprising at least one lithiophilic metal and at least one at least partially calcined organic ligand. The invention further discloses the methods for manufacturing the electrode material, the electrodes comprising the material, and the use of the electrodes in electrochemical cells and batteries.

The invention provides a lithium primary battery negative electrode with deep sea pressure bearing capacity and a preparation method thereof, and belongs to the technical field of deep sea lithium primary battery manufacturing, the lithium primary battery negative electrode comprises a negative electrode current collector, a lithium layer is arranged on the surface of the negative electrode current collector through electrochemical plating lithium, the surface of the lithium layer is coated with an SEI film layer, and an electroplating electrolyte of electrochemical plating lithium comprises a lithium salt and a solvent, the lithium salt comprises LiPF6, and the solvent comprises DMC. According to the present invention, with the electrochemical lithium plating method, the compact metal lithium layer can be deposited on the surface of the negative electrode current collector, and the metal lithium layer prepared through the method can maintain the close connection with the negative electrode current collector in the 0-127 MPa hydrostatic pressure environment, and can maintain the pressure resistance stability between the metal lithium layer and the SEI film in the pressure environment.

The disclosed lithium primary battery is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The positive electrode contains a positive electrode mixture, and the positive electrode mixture contains LixMnO2 (0 < = x < = 0.05) and a boron compound. The amount of boron atoms contained in the positive electrode mixture is from 0.01 parts by mass to 1.65 parts by mass (inclusive) per 100 parts by mass of manganese atoms contained in the positive electrode mixture. The negative electrode contains an alloy containing lithium and magnesium. The content of lithium in the alloy exceeds 88% by mass, and the content of magnesium in the alloy is 0.01-10% by mass (inclusive).

The invention relates to a sulfide modified carbon fluoride composite electrode and a preparation method thereof, and belongs to the technical field of battery material preparation. Sulfide and a carbon fluoride material are subjected to ball milling to obtain a sulfide modified carbon fluoride composite material; adding the composite material and a conductive agent into a polymer binder solution to obtain sulfide modified carbon fluoride composite electrode slurry; and coating a current carrier with the slurry, and carrying out vacuum drying to obtain the sulfide modified carbon fluoride composite electrode. According to the invention, the surface morphology and conductive structure of the carbon fluoride material particles are modified by the high-conductive sulfide through a simple ball milling method. The sulfide has multivalent states and structural defect vacancies, not only stabilizes a high discharge platform of the carbon fluoride material at the initial stage of discharge, but also increases a reaction platform at the final stage of discharge, so that the discharge capacity of the carbon fluoride material is effectively improved. And meanwhile, the conductivity and the ion migration rate of the carbon fluoride material are improved, so that the composite electrode has a high working voltage platform and energy output performance under a high-rate discharge condition.

The utility model belongs to lithium sub -power type battery technical field discloses a kind of lithium sub -power type battery negative electrode structure, including upper and lower two negative electrode lithium strips, one layer nickel strip current collector bar and one layer nickel hole current collector net are fixedly arranged between two negative electrode lithium strips;The utility model connects with nickel hole current collector net when the interlayer structure of negative electrode lithium strip-nickel strip current collector bar-nickel hole current collector net-negative electrode lithium strip can also guarantee when breaking down due to the consumption of reaction at the time of reaction to end time;Nickel strip current collector bar and nickel hole current collector net between using spot welding mode connection, nickel strip current collector bar and nickel hole current collector net are pressed together with lithium strip using roll pressing mode, guarantee the firm reliable connection and sufficient contact between both, effectively improve the utilization of negative electrode active material, the load output ability and the safety performance after battery discharge of battery.

The invention belongs to the technical field of battery manufacturing, and provides a positive pole piece of a lithium-manganese dioxide battery and a manufacturing process and application of the positive pole piece. A polymer ion channel coating is arranged on the surface of a positive active layer of the positive pole piece; and the polymer ion channel coating contains a polymer ion channel with a porous structure. By forming the ion channel layer with the porous structure on the surface of the positive electrode, the wettability of the surface of the positive electrode plate to electrolyte can be improved while the stability of the positive electrode is maintained. Moreover, the reaction activity of a polymer ion channel is low, the polymer ion channel cannot react with a positive electrode active substance in the positive electrode or an electrolyte and the like generally, the stability is good, the problem that electrolyte on the surface of the positive electrode volatilizes quickly under the long-term high-temperature condition of a primary battery can be better solved through coating and film forming, and the electrolyte wettability of the surface of the positive electrode is more effectively improved.

The invention relates to the technical field of chemical batteries, in particular to a preparation method of a high-performance lithium primary battery positive plate. The method comprises a process of coating slurry on a metal belt to prepare a pole piece, and the metal belt is prepared by the following steps: S1, carrying out roughening treatment on the surface of a stainless steel belt; s1, the stainless steel band obtained in the step S1 is subjected to punching and drawing to be machined into a rhombic metal net; s2, the metal net obtained in the step S2 is placed in an acid solution to be cleaned, surface impurities are removed, and S3, aluminum plating is conducted on the surface of the cleaned metal net. The aluminum-plated composite net is used in the positive plate, part of manganese dioxide is embedded into an aluminum layer in the rolling process of a compression roller after slurry coating, an active matter is in closer contact with a current collecting net, and the contact resistance is further reduced. Therefore, the positive plate is high in density and low in internal resistance, and the obtained battery is high in capacity, high in energy density and high in large-current load capacity.

To provide long and ultra-long duration energy storage systems.SOLUTION: There are provided a battery, a bulk energy storage system including the battery, and / or a method of operating the bulk energy storage system including the battery. The battery may include a first electrode, an electrolyte, and a second electrode, wherein one or both of the first electrode and the second electrode comprise direct reduced iron ("DRI"). The DRI may be in the form of pellets. The pellets may comprise at least about 60 wt.% iron by elemental mass, based on the total mass of the pellets. One or both of the first electrode and the second electrode comprises from about 60% to about 90% iron and from about 1% to about 40% of a component comprising one or more of materials selected from a group of SiO2, AI2O3, MgO, CaO, and TiO2.SELECTED DRAWING: Figure 1

This invention provides a thick electrode positive electrode sheet, its preparation method, and a primary battery. The method includes the following steps: first, mixing a positive electrode active material, a conductive agent, and a binder resin to obtain a mixture; then, subjecting the mixture to fibrosis treatment to obtain a fibrous mixture; next, granulating the fibrous mixture with a granulating agent to obtain a precursor material, wherein the granulating agent is a liquid with a vapor pressure not less than 0.2 mmHg; finally, subjecting the precursor material to roll forming to obtain the thick electrode positive electrode sheet. The preparation method provided by this invention can be widely applied to battery systems that require the use of current collectors to fabricate thick electrodes (>500 μm), and solves problems such as the difficulty in continuous automated production of thick electrode sheets using current collectors, high electrode powder shedding rate, and uneven thickness.

The invention discloses a low-temperature-resistant negative electrode zinc paste and a low-temperature alkaline zinc-manganese battery containing the zinc paste. The negative electrode zinc paste comprises the following components in parts by weight: 60-65 parts of zinc powder, 1-2 parts of a composite conductive agent, 0.1-0.3 part of a composite corrosion inhibitor and 35-38 parts of a low-temperature electrolyte; the low-temperature electrolyte comprises a multi-element nonionic surfactant system, a multi-element nano anti-freezing agent system and a mixed solution A, the 3.9 ohm discharge capacity of the battery under the condition of-40 DEG C is larger than or equal to 60% compared with the capacity retention rate at normal temperature, the interface impedance amplification is smaller than or equal to 15%, the hydrogen evolution amount is reduced by 80% on year-on-year basis, the process is compatible with an existing production line, and the battery is suitable for polar scientific investigation and electronic equipment in plateau and cold regions.

This lithium primary battery is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The positive electrode contains a positive electrode mixture that contains manganese dioxide and an oxide of a metal Me. The metal Me has a valence of 2 or more, an ion radius of 0.8 or less, and an electronegativity of 1.65 or less. The amount of the oxide of the metal Me contained in the positive electrode mixture is 0.1-5 parts by mass per 100 parts by mass of the manganese dioxide contained in the positive electrode mixture. The negative electrode contains an alloy containing lithium and magnesium. The content of lithium in the alloy is greater than 88% by mass, and the content of magnesium in the alloy is 0.01-10% by mass (inclusive).

Cathode and electrochemical cells are provided in which a barium, bismuth, or nickel additive is included to improve the stability of manganese dioxide at high voltages. The metal additives provided herein improve the performance of electrochemical cells.

The application discloses an acid-activated regenerated brick-mixed micro-powder-metakaolin geopolymer battery and a preparation method thereof. The geopolymer battery is formed by sequentially stacking and pouring a geopolymer positive electrode layer, a geopolymer electrolyte layer and a geopolymer negative electrode layer. The three layers all comprise regenerated brick-mixed micro-powder and metakaolin. The preparation method comprises the following steps: preparing geopolymer positive electrode layer slurry, geopolymer electrolyte layer slurry and geopolymer negative electrode layer slurry respectively; sequentially pouring the positive electrode layer, the electrolyte layer and the negative electrode layer, and vibrating and standing each layer after pouring according to preset parameters, and arranging copper-plated steel fibers in the whole structure by a magnetic field; and curing and coating the whole structure. The geopolymer battery has excellent conductivity, load capacity and interlayer bonding strength, and the whole structure is stable.

To provide a method for manufacturing electrodes for all-solid-state batteries that can suitably produce electrodes for all-solid-state batteries. [Solution] A method for manufacturing an electrode for an all-solid-state battery according to one aspect of the present disclosure comprises a pressing step, a transfer step, and a peeling step. The pressing step involves forming an active material layer on the front and back surfaces of a current collector and pressing them. The transfer step involves transferring a solid electrolyte layer, which is arranged on a sheet, onto the active material layers formed on both surfaces of the current collector. The peeling step involves peeling the sheet from the solid electrolyte layer.

Disclosed are a winding apparatus and a winding method, the winding apparatus includes: a winding needle, being configured to wind a winding material; a power supply assembly, being configured to be electrically coupled to the winding needle, so as to form current on an axis of the winding needle; and a magnet supply assembly, being configured to provide a magnetic field to the winding needle, a magnetic field direction intersecting the axis of the winding needle so that the winding needle generates an ampere force for resisting a deformation of the winding needle in the magnetic field when the winding material is wound. By the above method, the present application may reduce the deformation of the winding needle, reduce a defective rate of a winding product formed by the winding of the winding material, and improve quality of the winding product.

A lithium primary battery includes a positive electrode, a negative electrode, and a liquid non-aqueous electrolyte. The positive electrode contains a positive electrode material mixture including LixMnO2 where 0≤x≤0.05. The negative electrode contains at least one of metal lithium and a lithium alloy. The liquid non-aqueous electrolyte contains a cyclic imide component and an organic silyl borate component. The concentration of the cyclic imide component in the liquid non-aqueous electrolyte is 1 mass % or less, the concentration of the organic silyl borate component in the liquid non-aqueous electrolyte is 5.5 mass % or less, and the mass ratio of the cyclic imide component to the organic silyl borate component contained in the liquid non-aqueous electrolyte is 0.02 or more and 10 or less.

To provide a lithium primary button type battery having excellent discharge performance, good stability and reliability, its manufacturing method, and an electronic apparatus.SOLUTION: A lithium primary button battery comprises a battery case and a battery core module located inside the battery case, the battery core module comprises a negative electrode (3), a negative electrode modification membrane (4), a separator (5, 6) and a positive electrode (7) which are sequentially stacked, a surface of the negative electrode (3) close to the negative electrode modification membrane (4) is provided with a concave groove (9), and the negative electrode modification membrane (4) is tightly embedded in the concave groove (9).SELECTED DRAWING: Figure 2

A lithium primary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains manganese dioxide. The negative electrode includes a first lithium layer and an aluminum layer laminated with the first lithium layer. The first lithium layer is an alloy layer containing lithium and magnesium. The content of the lithium in the alloy layer is 89% by mass or more and 99.98% by mass or less. The content of the magnesium in the alloy layer is 0.02% by mass or more and 1.5% by mass or less.

The invention relates to the technical field of energy storage equipment, in particular to a battery and a manufacturing method, the battery comprises a positive electrode, and raw materials of the positive electrode comprise manganese dioxide, ketjen black, carbon nanotubes and graphene. The weight ratio of the manganese dioxide in the manganese dioxide, the ketjen black, the carbon nano tube and the graphene is 92%-96%. The Ketjen black accounts for 0.5%-2% of the manganese dioxide, the Ketjen black, the carbon nano tube and the graphene by weight. And / or the value range of the weight ratio of the carbon nano tube in the manganese dioxide, the ketjen black, the carbon nano tube and the graphene is 1%-3%. And / or the value range of the weight ratio of the graphene in the manganese dioxide, the ketjen black, the carbon nanotubes and the graphene is 1%-3%. The manufacturing method is used for manufacturing the battery and comprises the following steps: grinding the manganese dioxide, the ketjen black, the carbon nanotubes and the graphene into powder, adding the polytetrafluoroethylene powder, and uniformly stirring to obtain the positive electrode powder.

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

The utility model discloses a zinc-manganese battery positive electrode production tablet press which comprises a tablet pressing base, two limiting seats which are symmetrically distributed are arranged on the bottom wall of the tablet pressing base, storage trays are inserted into the limiting seats, 24 storage grooves which are uniformly distributed are formed in the storage trays, and the tablet press further comprises a self-discharging mechanism. The automatic discharging mechanism comprises a guide rail, a sliding seat, a material returning shifting frame and guide seats, the guide rail is arranged at the rear end of the bottom of the tablet pressing base, the sliding seat is connected into the guide rail in a sliding mode, the material returning shifting frame is arranged at the front end of the sliding seat, and the guide seats are arranged at the left end and the right end of the middle of the material returning shifting frame. According to the device, the compacted zinc-manganese battery positive plates can be automatically taken out from the corresponding compaction parts and collected together, workers do not need to independently carry out the compacted zinc-manganese battery positive plate blanking operation in the later period, the subsequent processing steps of the zinc-manganese battery positive plates are reduced, and the device is convenient to use.