426results 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.

This invention relates to the field of magnesium primary battery preparation technology, and discloses a magnesium aqueous primary battery system, including a positive electrode, a negative electrode, and an electrolyte. The negative electrode is any one of magnesium metal and magnesium alloy. The positive electrode is made of a positive electrode active material, superconducting carbon, and a first-order gelatinizing agent. The electrolyte is made of magnesium bromide, a corrosion inhibitor, and a second-order gelatinizing agent. The preparation method includes the following steps: S1: preparing a positive electrode slurry; S2: preparing an electrolyte by introducing a corrosion inhibitor into the magnesium bromide electrolyte, followed by adding a second-order gelatinizing agent for gelatinization treatment to obtain a slow-release gelatinized electrolyte; S3: preparing a positive electrode steel shell; S4: assembling the battery. The technical solution of this invention not only slows down the corrosion rate of the negative electrode material and improves the utilization rate of the negative electrode material, but also solves the problems of voltage hysteresis and volume expansion during battery discharge; furthermore, it can match the reaction rates of the positive and negative electrodes.

The invention discloses a high-capacity and high-energy-density lithium / carbon fluoride battery and a preparation method thereof, and relates to the technical field of lithium / carbon fluoride batteries. The active carbon with high specific surface is added into the positive electrode slurry, and the porous structure of the active carbon provides more lithium ion transmission channels, so that LiF accumulation is relieved, polarization is reduced, and the discharge capacity and the energy density of the lithium / carbon fluoride battery are improved; and by optimizing the battery process ratio, the prepared lithium / carbon fluoride battery has high thermal conductivity and uniform heat dissipation, the thermal runaway risk is reduced, and the battery safety is improved.

The invention provides positive electrode slurry of a low-temperature lithium carbon fluoride battery and a slurry homogenizing method, the positive electrode slurry comprises a positive electrode active material, perfluorooctyl sulfonate, a binder, a conductive agent and a solvent, and the mass ratio of the positive electrode active material to the perfluorooctyl sulfonate is (85-90): (1-6); the homogenizing method comprises the following steps: uniformly mixing a positive electrode active material, perfluorooctyl sulfonate and a conductive agent according to a ratio to obtain a first mixture; dissolving a binder in a solvent according to a ratio to obtain a second mixture; and uniformly mixing the first mixture and the second mixture to obtain the positive electrode slurry of the low-temperature lithium carbon fluoride battery. The perfluorooctyl sulfonate is introduced into the positive electrode slurry, and through the synergism of the following effects: the diffusion path of lithium ions is reduced, the desolvation energy barrier of the lithium ions is reduced, the conductive agent is uniformly dispersed and participates in electrochemical reaction to generate fluoride with conductivity better than that of lithium fluoride, and the electrochemical performance of the low-temperature lithium carbon fluoride battery is improved.

The invention provides a lithium-manganese button cell positive electrode ring prepared based on a dry electrode process as well as a preparation method and application of the lithium-manganese button cell positive electrode ring. The method comprises the following steps: premixing electrolytic manganese dioxide (EMD) powder, a conductive agent and low-melting-point polytetrafluoroethylene (PTFE) fibers in a low-temperature environment; carrying out high-speed shearing on the premixed material to form a dry electrode blank material with self-supporting capability; the obtained dry electrode blank material is subjected to hot rolling through a heating roller device, and an obtained film material is conveyed back to the heating roller device to be subjected to second face rolling; wherein the temperature of the roller is controlled within a temperature range which is lower than the melting point of the PTFE fiber but is enough to enable the PTFE fiber to creep, and meanwhile, high pressure is applied; and die cutting and forming. The positive electrode ring of the lithium-manganese button cell prepared by the method has a unique gradient pore structure and a high-conductivity network, and polarization is greatly reduced, so that the cell is more suitable for an application scene of high pulse current discharge.

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.

This invention provides a fully open, long-endurance Mars battery and its fabrication method. The Mars battery comprises a vertical serpentine cell, an insertable anode current collector, a mesh cathode current collector, and a dustproof and breathable membrane. The fabrication scheme is as follows: preparation and assembly of the serpentine tubular solid electrolyte, preparation and coating of a gas diffusion and gas reaction dual-functional layer, preparation and filling of a Na / K-containing liquid alloy, integration of the rod-shaped anode and mesh cathode current collectors, and encapsulation with the dustproof and breathable membrane. The gas diffusion and gas reaction dual-functional layer is uniformly coated on the outside of the serpentine electrolyte tube, thus providing a 360° contact surface with the Martian atmosphere and exhibiting a fully open cathode characteristic, resulting in superior energy density compared to batteries with traditional single-sided gas reaction electrodes. This invention combines the advantages of solid electrolyte-based batteries—openness under the low atmospheric pressure of Mars—and the ability of the liquid alloy to fully wet the interface, coupled with the protection of the dustproof and breathable membrane, which will promote the design and development of long-endurance, all-weather Mars batteries.

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

The present technology relates to solid polymer electrolyte membranes comprising a heterogeneous mixture of at least two different polymers, one of which is a branched polyether having at least 3 branches. Methods for their manufacture, as well as electrochemical cells, batteries and electrochemical energy accumulators comprising them, and uses thereof are also described.

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.

The present technology relates to a composite material comprising inorganic particles, a fluorinated amide compound and, optionally, an electrolyte polymer, a plasticizer and / or a salt, as well as to the method for preparing the composite material. Also disclosed are the solid electrolytes and electrode materials comprising the present composite material and their use in electrochemical cells and storage batteries containing them.

To provide an alkaline electrochemical battery.SOLUTION: Alkaline electrochemical cells are provided, wherein dissolved zinc oxide or zinc hydroxide is included at least in the free electrolyte solution, and / or solid zinc oxide or zinc hydroxide is included in the anode, so as to slow formation of a zinc oxide passivation layer on a zinc electrode. Methods for preparing such cells are also provided.SELECTED DRAWING: Figure 1

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.

This invention discloses a composite sheet in the field of thermal battery technology. The sheet comprises a heating powder, a positive electrode material, and a nano-diaphragm powder, which are laminated and pressed together. The heating powder is a mixture of micro-nano iron powder and potassium perchlorate in a weight ratio of 70-90:10-25. The positive electrode material comprises components and their usage ratios of disulfide: electrolyte: adsorbent: high-thermal-conductivity graphene in the order of 65-85:5-10:3-10:7-15, with the adsorbent being MgO or Al2O3. The nano-diaphragm powder is a mixture of electrolyte and MgO in a ratio of 50-65:35-50, heated and melted, and then formed into particles with a size of less than 10 μm. The composite sheet obtained by this invention can be used to prepare a novel fast-activation single-cell battery, shortening activation time by over 50% compared to conventional single-cell batteries.

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.

Provided is an electrode material containing an electrode active material and a polymer having an ability to preferentially conduct metal ions, in which a volume ratio of the polymer to a total volume of the electrode active material and the polymer is 0.01 to 0.65.

The utility model discloses a pole piece rolling device for lithium battery production, which comprises a base, the top of the base is fixedly connected with a fixed frame I, and the outer side wall of the fixed frame I is fixedly connected with a pair of inclined rods. In the actual use process, the first motor is fixed to the fixing block and drives the two-way threaded rod to rotate, the two-way threaded rod rotates to drive the connecting block to move reversely, the connecting block further pushes the connecting column to move reversely, and the rotating column on the connecting column moves along with the connecting column; the pole piece can smoothly move on the first rotating rod on the inclined plate, the problems of inaccurate positioning and correction of the pole piece in the winding process are solved through precise matching of the assemblies, the position of the pole piece can be automatically corrected through the adjusting function of the two-way threaded rod and the first connecting frame, and it is ensured that the pole piece can stably and accurately move under guiding of the shell and the inclined plate; therefore, the condition of irregularity during winding is avoided, and the pole piece processing precision and efficiency are 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).