574results about "Primary cell electrodes" patented technology

The embodiments described herein involve electrochemical cells that have a heating element integrated into the electrochemical cell. In some aspects, an electrochemical cell comprises an anode current collector, an anode material disposed on the anode current collector, a cathode current collector, a cathode material disposed on a first side of the cathode current collector, a separator disposed between the anode material and the cathode material, and a heating element disposed on a second side of the cathode current collector, the second side opposite the first side. The heating element may include an electrically conductive material and a conductive material and disposed in an insulative material.

The invention discloses an ultrasonic welding head, a tab, an electrode assembly, a single battery, a battery and a power utilization device.The ultrasonic welding head comprises a welding head body and first welding teeth, the welding head body is provided with a welding face, the first welding teeth are arranged on the welding face in a protruding mode, and each first welding tooth comprises a plurality of tooth parts; the multiple tooth parts are the first tooth part and the mth tooth part which are sequentially arranged in the protruding direction of the first welding tooth, the nth tooth part is arranged on the end face of the end, away from the welding face, of the (n-1) th tooth part, the end face of the end, away from the welding face, of the (n-1) th tooth part exceeds the nth tooth part, and n is larger than or equal to 2 and smaller than or equal to m. The ultrasonic welding head can reliably weld corresponding parts of the battery monomer, and the service reliability of the battery monomer is improved.

The invention discloses a high mass specific energy power primary battery and electric equipment, and relates to the technical field of batteries. Comprising a cover group, a shell, a positive pole piece, a diaphragm, a negative pole piece, a thermistor, an electrolyte, a bottom cover plate and a hole plugging piece, the shell is of a hollow cylindrical structure with two open ends and is covered by the cover set and the bottom cover plate to form a containing cavity. A collector plate and a pole are made of a high-conductivity metal material, and the pole and a cover group body are hermetically connected through a glass body; the negative pole piece is provided with a supporting structure, each of the positive pole piece and the negative pole piece is provided with at least one pole lug, the positive pole piece or the negative pole piece is coated with a diaphragm of a coating layer and placed in the accommodating cavity, the negative pole lug is connected with a bottom cover plate, the positive pole lug is connected with one end of a thermistor, the other end of the thermistor is connected with a collector plate, and electrolyte is injected to prepare the battery. The problems of continuous current output of more than 5C, use in an environment of-55 DEG C to 125 DEG C, overload impact of gravitational acceleration of more than 10 times, impact of environment temperature, storage for more than 10 years and the like of a primary battery are solved.

The invention relates to a composite current collector and a preparation method thereof, an electrode plate, a battery and an electric device. The composite current collector comprises a supporting layer, a bonding layer and a conducting layer, wherein the bonding layer and the conducting layer are sequentially stacked on the two opposite surfaces of the supporting layer in the direction away from the supporting layer; according to the composite current collector, the stripping force between the supporting layer and the conductive layer is effectively improved, and the stripping risk of the composite current collector under long-term soaking in electrolyte is reduced.

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.

A disclosed cylindrical lithium primary battery (100) includes: an electrode group (10) in which a positive electrode (1), a negative electrode (2), and a separator (3) are wound; a short-circuit metal sheet (21) disposed on the negative electrode (1); and a battery case that accommodates the electrode group (10) and functions as a negative electrode terminal. The positive electrode (1) includes: a positive electrode current collector having a plurality of through holes; and a positive electrode mixture layer disposed on the positive electrode current collector. The positive electrode has a current collector exposed part (1c) where a part of the positive electrode current collector is exposed. The negative electrode (2) includes a lithium-containing metal sheet. The short-circuit metal sheet (21) contains at least one metal element M selected from the group consisting of copper, iron, nickel, and zinc. At least a part of the short-circuit metal sheet (21) and at least a part of the current collector exposed part (1c) face each other across the separator (3). The short-circuit metal sheet (21) is electrically connected to the battery case not through the lithium-containing metal sheet.

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.

An ultrasonic welding head (10). The ultrasonic welding head comprises a welding head main body (1) and first welding teeth (2); the welding head main body is provided with a welding surface (1a), the first welding teeth protruding from the welding surface; the first welding teeth comprise a plurality of tooth parts (20), the plurality of tooth parts respectively being a first tooth part (21) to an m-th tooth part which are successively arranged in the protruding direction of the first welding teeth; the n-th tooth part is arranged on the end surface of the end of the (n-1)th tooth part away from the welding surface, the end surface of the end of the (n-1)th tooth part away from the welding surface exceeding the n-th tooth part, and 2≤n≤m. The present application further relates to an ultrasonic welding device, an electrode assembly (30), a battery cell (100), a battery (200), and an electrical device (1000).

Disclosed is a cylindrical lithium primary battery (100) including: an electrode group (10) in which a positive electrode (1), a negative electrode (2), and a separator (3) are wound; an electrically insulating layer (22) disposed inside the electrode group (10); a short-circuiting metal sheet (21) disposed on the negative electrode (2); and a battery case (9). The positive electrode (1) includes a positive electrode mixture layer disposed on a positive electrode current collector. The negative electrode (2) includes a lithium-containing metal sheet. The short-circuiting metal sheet (21) contains at least one metal element M selected from the group consisting of copper, iron, nickel, and zinc. The lithium-containing metal sheet, the short-circuiting metal sheet (21), and the battery case (9) are electrically connected. The electrode group (10) has a layered portion (10x) in which the electrically insulating layer (22) is disposed. In the layered portion, the lithium-containing metal sheet, the short-circuiting metal sheet (21), the separator (3), the positive electrode (1), and the electrically insulating layer (22) are laminated in a prescribed order.

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 discloses a preparation method of a carbon fluoride material based on metal-based ionic liquid modification, which comprises the following steps: heating an ionic liquid to 30-100 DEG C in an inert atmosphere, then adding a metal salt, uniformly stirring to obtain a metal-based ionic liquid, dispersing the metal-based ionic liquid into an organic solvent, then adding carbon fluoride, uniformly stirring, carrying out suction filtration on the mixed solution, and drying to obtain the carbon fluoride material based on metal-based ionic liquid modification. And finally, calcining at 300-450 DEG C for 0-12 hours to obtain the catalyst. The method is simple in preparation process and low in cost, large-scale production can be achieved, the prepared carbon fluoride material has good rate capability and discharge capacity when serving as a lithium / carbon fluoride primary battery positive electrode material, and the problems that an existing lithium / carbon fluoride primary battery is poor in rate capability and poor in discharge capacity are solved. And the problems of low power density, voltage lag under high-rate discharge and low discharge capacity are solved.

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.

To provide a power generation method and a power generation element, capable of obtaining electromotive force by utilizing humidity fluctuations in an environment and having excellent operational stability.SOLUTION: An aqueous solution of a deliquescent ionic compound is separated by an ion-permeable membrane and electrodes are inserted on both sides thereof; one is shielded from the outside air and sealed and the other is connected to the outside air; a humidity change in the outside air causes ion concentration differences across the ion-permeable membrane, derived from the ionic compound in the aqueous solution; and the electromotive force is generated between the electrodes.SELECTED DRAWING: Figure 1

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.

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

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

The present invention discloses a high specific energy thermal battery single cell, which is composed of a heating layer, a first molten salt buffer current collector layer, a second molten salt composite positive electrode layer, a third molten salt separator layer, a negative electrode layer and a negative electrode current collector layer. The single cell has a directional pressure relief composite positive electrode layer, a dual heterogeneous thermal buffer material, and a triple heterogeneous functional ring. The first molten salt contains heavy metal element ions Ni that preferentially accept electrons 2+ , and the molar ratio of element F to Br is about 22:47, and the molar ratio n of Cl element is determined by the molar ratio m of cation Ni element, and its value n = 31c + m×2, where m = 1-10. The no-load single cell voltage of the battery is 2-2.6V, and it has strong load capacity in the later stage.

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

The present invention provides an alkaline button cell that has excellent load characteristics and high reliability.　An alkaline button cell which is obtained by having a positive electrode that has a positive electrode mixture layer containing silver oxide and a conductive assistant, a negative electrode that contains zinc particles, and an alkaline electrolyte solution contained in a battery container that is composed of an outer package can, a cover plate and a resin gasket, wherein: carbon black and graphite particles are contained as the conductive assistant in the positive electrode mixture layer; and the water content in the battery container is set to 0.63-1 g per 1 g of the zinc particles in the negative electrode.

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.