238results about "Alkaline accumulator electrodes" patented technology

To provide a wound electrode body that can improve heat dissipation on the inside of the winding. [Solution] The wound electrode body 10 is a wound electrode body 10 in which a first electrode 11A and a second electrode 11B having a different polarity from the first electrode 11A are wound in a flat shape via a separator 12. In the wound electrode body 10, the first electrode 11A includes a resin substrate, a conductive layer provided on the surface of the resin substrate, and a first active material layer 200A provided on the main surface of the conductive layer located on the side opposite to the side where the resin substrate is located relative to the conductive layer. The portion of the resin substrate located on the inside of the wound electrode body 10 has higher heat dissipation than the portion located on the outside of the wound electrode body 10.

The utility model relates to the technical field of batteries, in particular to a nickel-metal hydride battery positive pole piece and a battery. The positive pole piece of the nickel-metal hydride battery comprises a base material, an active material area and a net position buffer area located on one side of the active material area are formed on the base material, a tab belt is welded to the net position buffer area, an insulating layer is pasted to the tab belt, the insulating layer at least covers part of the inner side edge of the tab belt in the width direction, and the outer side edge of the tab belt is provided with a gap between the active material area and the net position buffer area. And at least part of the net bit buffer area is covered. By adopting the mode, the stability of the battery can be improved.

The invention belongs to the technical field of zinc ion batteries, and particularly relates to a zinc metal negative electrode and a zinc ion battery. The zinc metal negative electrode comprises a zinc metal substrate and a coating covering the surface of the zinc metal substrate, the coating comprises a conductive metal oxide; the coating is formed on the zinc metal substrate in a manner independent of an organic polymer binder. According to the scheme, the use of an insulating organic polymer adhesive is avoided, so that the conductivity of the coating is improved, and the structural controllability of the coating is improved. The high-conductivity indium tin oxide (ITO) nanorod is prepared through cooperation of microwave solvothermal synthesis and high-temperature calcination, and a protective layer which is free of a binder and controllable in structure is constructed on the surface of the zinc foil through the electrophoretic deposition technology.

The invention discloses an L-cysteine doped ammonium vanadate positive electrode material, a preparation method thereof and application of the L-cysteine doped ammonium vanadate positive electrode material in an aqueous zinc ion battery, and belongs to the technical field of materials. The preparation method comprises the following steps: adding ammonium metavanadate and oxalic acid into deionized water, stirring and mixing, then adding L-cysteine, carrying out hydrothermal reaction on the obtained mixed solution, cooling to room temperature, carrying out centrifugal cleaning, and carrying out vacuum drying to obtain the L-NVO. L-NVO is prepared through a simple one-step hydrothermal method, L-cysteine is doped into the electrode material through further reaction, the introduction of L-cysteine not only enlarges the interlayer spacing of NVO, but also participates in the storage of zinc ions, increases the active sites of the zinc ions, effectively promotes the diffusion of ions and charge transfer, and improves the electrochemical performance of the electrode material. The conductivity of the material is improved, the internal resistance of the material is reduced, and the structural flexibility and stability of the material are maintained, so that the overall performance of the aqueous zinc ion battery is improved.

The invention relates to the technical field of alkaline batteries, in particular to a high-humidity-resistant and anti-corrosion alkaline battery positive electrode composite conductive material and a preparation method thereof. The positive electrode composite conductive material comprises 50-70 parts of modified carbon nanotubes, 20-30 parts of crystalline flake graphite, 5-15 parts of molybdenum-doped SnO, 3-8 parts of a binder and 0.5-2 parts of conductive carbon black. The material is particularly suitable for high-humidity and strong-alkali environments (such as ocean equipment batteries and tropical region energy storage systems), has long service life and high output efficiency, and overcomes the defects that a traditional conductive material is easy to corrode and rapid in conductivity attenuation. The preparation method disclosed by the invention is simple and convenient to operate and clear in flow, does not need complex equipment and special process conditions, reduces the production cost and the production difficulty, is easy to realize industrial production, and is beneficial to popularization and application of the technology.

To ensure easy permeation of an electrolyte solution into an electrode plate during the injection of the electrolyte solution.SOLUTION: A positive electrode plate 2 is configured so that: when a coating side surface 22a of a positive electrode mixture layer filling a positive electrode current collector 21 is divided into a plurality of regions including an upper region Wt1 and a lower region Wt3 in an up-down direction and, at an end part 22d of the positive electrode mixture layer, an average uneven width of the end part 22d of the positive electrode mixture layer in the upper region Wt1 is defined as an uneven width ΔW1 and an average uneven width of the end part 22d of the positive electrode mixture layer in the lower region Wt3 is defined as an uneven width ΔW3, uneven width ΔW1≤uneven width ΔW3 is satisfied. At the injection of the electrolyte solution, the electrolyte solution remaining at the bottom of an electrode group easily permeates from the end part 22d of the lower region Wt3.SELECTED DRAWING: Figure 7

The invention discloses a photo-assisted self-charging battery based on a phenazine positive electrode material and a preparation method of the photo-assisted self-charging battery, and belongs to the technical field of aqueous zinc batteries, a phenazine organic matter electrode with electrochemical activity and photo-response activity is used as a zinc ion storage material, and in a safe and environment-friendly aqueous electrolyte, the photo-assisted self-charging battery is prepared. The self-charging process of the organic matter electrode is realized under the photo-assisted condition by utilizing the electron hole transmission characteristic of the nitrogen-containing hybrid organic matter, and the discharge product of the phenazine organic matter electrode absorbs photons to generate electron hole pairs under the photo-assisted effect under the condition of no external power supply through the photo-assisted effect of solar energy, so that the nitrogen-containing hybrid organic matter is charged. Then, holes are diffused to the hole transport layer, electrons are injected into the electron transport layer to form voltage, and the self-charging dezincification process of the electrode is achieved by means of charge / carrier separation.

To provide a wound electrode body that can reduce the number of parts. [Solution] The wound electrode body 10 includes a separator 110 in which a first electrode region R1 and a second electrode region R2, each provided with an electrode layer, are alternately arranged with a gap between them. The wound electrode body 10 is formed by winding the separator 110 such that the direction in which the first electrode region R1 and the second electrode region R2 are aligned is aligned with the winding direction.

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

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.

Embodiments of the present disclosure disclose a low-cost alkaline secondary battery positive electrode material and a preparation method and application thereof, which belongs to the technical field of alkaline secondary battery. The positive electrode material includes a composite positive electrode material including manganese dioxide and partially oxidized layered hydroxide, etc. The composite positive electrode material prepared by the embodiments of the present disclosure has the advantage of a high discharge platform, or the like, with respect to a conventional manganese electrode, which significantly improves the cycling stability and reversibility of the zinc-manganese alkaline secondary battery.

The invention relates to the technical field of battery electrodes, and discloses a negative electrode coating preparation method, a negative electrode plate and a battery. According to the negative electrode coating preparation method, a zinc-based composite negative electrode plate is coated with colloid formed by taking ferric iron complex salt as an effective component; a protective film can be formed on the surface of the zinc-based composite negative pole piece in the charging and discharging process of the battery, and the protective film prevents a negative active substance from being dissolved in an electrolyte, slows down the rapid attenuation of the discharge capacity of the battery, prevents the negative pole piece from being in direct contact with the electrolyte, reduces gas production of the battery, enables zinc to be uniformly deposited and prevents zinc dendrites from being formed, so that the service life of the battery is prolonged. And the charge-discharge efficiency of the battery is improved under the condition of prolonging the cycle life.

The invention relates to the technical field of aqueous zinc ion batteries, in particular to a preparation method and application of a leaf-shaped ZIF-L / MXene composite material. The specific operation comprises the following steps: stirring and mixing a suspension of MXene and a zinc salt to obtain a mixed solution; the mixed solution and 2-methylimidazole are stirred to react, so that leaf-shaped ZIF-L uniformly and vertically grows on the surface of MXene, and the leaf-shaped ZIF-L / MXene composite material is obtained. The method is simple in process and mild in reaction condition, the obtained composite material has the porous structure of leaf-shaped ZIF-L and the conductive characteristic of MXene, and the iodine loading capacity and the electrochemical performance of the positive electrode of the zinc-iodine battery can be effectively improved.

The invention relates to a cylindrical battery cell housing having an aluminum material, to a method for producing a cylindrical battery cell housing, and to the use of an aluminum material in order to produce a cylindrical battery cell housing. The aim of the invention is to provide a cylindrical battery cell housing with a CO2 footprint which is reduced in comparison to the current reference material steel, said cylindrical battery cell housing simultaneously allowing an improved heat conduction and a reduced weight of the battery cell. This is achieved in that the cylindrical battery cell housing has an aluminum material in which the ratio of the carbon dioxide (CO2e) quantity emitted during the production of the aluminum material, in kgCO2e per kgAl material , to the yield point Rp0.2 of the aluminum material, in MPa, of CO2e / Rp0.2 is ≤ 1.9% kgCO2e / (MPa*kgAl material).

An alkaline storage battery includes a positive electrode. The positive electrode includes a positive electrode mixture. The positive electrode mixture contains a nickel compound and a metal compound. The nickel compound is a positive electrode active material The metal compound is a compound of at least one metal element selected from the group consisting of titanium, niobium, tungsten, vanadium, molybdenum, zirconium, and tantalum. A ratio Wm / Wn of a mass Wm of the metal compound contained in the positive electrode mixture to a mass Wn of the nickel compound contained in the positive electrode mixture in terms of nickel hydroxide ranges from 0.2 / 100 to 5.0 / 100. The metal compound contains iron at a mass ratio ranging from 10 ppm to 10000 ppm. A ratio We / Wp of a mass We of the alkaline electrolyte to a mass Wp of the positive electrode mixture ranges from 0.35 to 1.0.

A heating device for heating an electrode according to an embodiment of the present disclosure includes at least one heating lamp disposed to face the electrode; a heating chamber having an internal receiving space accommodating the heating lamp and configured to allow the electrode to pass through; and a control module configured to adjust the temperature of the electrode.

The invention belongs to the technical field of battery pole pieces, and particularly discloses a nickel battery positive pole piece suitable for a three-electrode test and a preparation method of the nickel battery positive pole piece. The method comprises the following steps: carrying out surface pretreatment on a foamed nickel base material, and cutting the foamed nickel base material according to requirements to obtain a conductive substrate; mixing an active substance, a conductive agent, an adhesive (polyvinylidene fluoride), an additive (yttrium oxide) and a solvent to obtain electrode slurry; and then coating a conductive substrate with the electrode slurry, drying and removing floating powder on the surface to obtain the nickel battery positive pole piece suitable for the three-electrode test. The preparation process of the nickel battery positive plate is simple, feasible and novel, and the prepared nickel battery positive plate is relatively high in capacity, good in adhesiveness of active substances and long in service life.

The systems and methods of various embodiments can provide porous materials for electrodes of electrochemical energy storage systems.

Systems, apparatuses, and / or the like are provided. In some embodiments, an electrochemical cell may include a container, a ring-shaped cathode disposed within the container, wherein the ring-shaped cathode defines an open interior, an anode disposed within the open interior of the ring-shaped cathode, a separator disposed between the cathode and the anode, an electrolyte solution, and a current collector electrically connected with a portion of the container, wherein the current collector is positioned at least partially within the anode. For example, current collectors may include a base including a first material that is fixedly attached to the portion of the container and a zinc component composed of a second material and fixedly attached to the base.

The invention discloses a secondary battery. Provided is a high-capacity secondary battery. The secondary battery is provided with a positive electrode layer containing, as a positive electrode active material, at least one of a Ni-based hydroxide containing elemental nickel and a Ni-based hydroxide coated with Co, the Co-coated Ni-based hydroxide has a coating layer containing elemental cobalt on at least a portion of the surface of the Ni-based hydroxide, and the positive electrode layer contains, as an additive material, a first additive material containing elemental boron, or a mixed additive material containing elemental boron. The mixed additive material is a mixed material of the first additive material and a second additive material containing cobalt element.

The invention relates to a layered structure (1) for a solid-state battery comprising a cathode active material (2), a solid electrolyte (6), and an anode (3), which has an amorphous silver-carbon primer (5) facing the solid electrolyte (6) and a current collector (4), wherein a metal layer (7) is arranged between the silver-carbon primer (5) and the solid electrolyte (6). The layered structure according to the invention is characterized in that the solid electrolyte (6) is designed as a sulfide crystalline solid electrolyte (6).

The invention provides an I2 / Bi2S3 (at) C composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: step 1, stirring a carbon source, ammonium persulfate, bismuth salt, a sulfur source and polyvinylpyrrolidone to obtain a mixed solution; 2, putting the mixed solution into a reaction kettle for heating reaction, and then putting a reaction product into a tubular furnace for calcining to obtain Bi2S3 at C; and 3, heating the Bi2S3 (at) C and iodine in a closed reaction kettle, and carrying out steam adsorption on the iodine by the Bi2S3 (at) C to obtain the I2 / Bi2S3 (at) C composite material. According to the preparation method, bismuth sulfide is doped on carbon, so that the adsorption capacity and the iodine fixation capacity on iodide ions are improved; the I2 / Bi2S3 (at) C after adsorbing the iodine steam is applied to the positive electrode of the aqueous zinc-iodine battery, so that the battery has the advantages of high specific capacity, slow specific capacity attenuation, good battery stability and the like.

The invention relates to the technical field of nickel-carbon batteries, in particular to a negative plate for a nickel-carbon battery and a preparation method and application thereof.The preparation method comprises the following steps that A, a porous current collector is prepared, carbon nanotubes are sputtered to the surface of the porous current collector through the magnetron sputtering technology, the carbon nanotubes are made to permeate into the porous current collector, and the porous current collector is prepared; the porous current collector permeated with the carbon nanotubes is obtained; and B, infiltrating negative electrode slurry into the porous current collector infiltrated with the carbon nanotubes by using a spraying process, compounding the negative electrode slurry with the pre-infiltrated carbon nanotubes, and drying to form a composite electrode coating, thereby obtaining the negative plate for the nickel-carbon battery. The preparation method of the negative plate for the nickel-carbon battery, provided by the invention, is simple and high in operability, and is beneficial to improving the energy density, the conductivity and the rate capability on the premise of ensuring the structural stability and the cycle life.

This invention relates to the field of battery cathode materials technology, and discloses a secondary zinc-manganese battery cathode material, its preparation method, and a secondary zinc-manganese battery. The secondary zinc-manganese battery cathode material includes manganese dioxide, graphite, calcium stearate, polypyrrole, and niobium pentoxide nanomaterials. The polypyrrole is coated onto the surface of the manganese dioxide via in-situ polymerization, and the niobium pentoxide nanomaterials are integrated into the polypyrrole-coated manganese dioxide composite material via in-situ growth. This invention provides a secondary zinc-manganese battery cathode material that, by employing a manganese dioxide / polypyrrole / niobium pentoxide composite material, constructs a stable conductive network and ion channels, significantly improving the conductivity and structural stability of the cathode material at low temperatures.

The invention discloses a method for constructing a high-performance alpha-phase nickel hydroxide positive electrode plate, and aims to solve the problem that the electrochemical performance cannot be exerted in a total battery due to poor intrinsic conductivity of traditional alpha-phase nickel hydroxide. According to the method, multiple conductive components are introduced in the preparation process of an alpha-phase nickel hydroxide positive electrode to construct a composite conductive network, and the conductive network comprises cobalt-coated beta-phase nickel hydroxide, cobalt-doped alpha-phase nickel hydroxide, cobalt-coated alpha-phase nickel hydroxide, carbon black and the like. Through effective compounding of the material and alpha-phase nickel hydroxide, the electron transmission capability and the structural stability of the alpha-phase nickel hydroxide positive electrode are remarkably improved. After the prepared positive electrode plate is assembled into a nickel-metal hydride battery or a zinc-nickel battery, a performance test is carried out, and a result shows that the nickel-metal hydride battery or the zinc-nickel battery has higher discharge capacity and more excellent cycle life. The method disclosed by the invention is simple in process, high in operability and suitable for development and application of the positive electrode plate of the high-performance alkaline secondary battery, and has a good industrialization prospect.

The utility model discloses a button cell device for in-situ electrochemical test, which comprises a shell, a positive plate, an isolation component and a negative plate, a cell inner cavity is formed in the shell, and a transparent observation window is arranged on the shell; the positive plate is provided with a positive observation hole; the isolation assembly comprises a diaphragm layer and a transparent blocking layer, a diaphragm through hole is formed in the diaphragm layer, and the transparent blocking layer is used for covering or blocking the diaphragm through hole; the active material layer of the negative plate faces the transparent observation window; the positive plate, the isolation assembly and the negative plate are sequentially stacked, and the transparent observation window, the positive observation hole and the diaphragm through hole are overlapped on the axial projection. Therefore, the behaviors of zinc dendrite growth and gassing side reaction of the active material on the negative plate can be observed in real time, so that a traditional button cell is transformed into a cell device suitable for in-situ electrochemical testing. In addition, the active materials of the positive plate and the negative plate can be prevented from being in direct contact through the transparent barrier layer, so that the problems of battery short circuit and the like are avoided.

To provide a zinc battery capable of suppressing self-discharge and maintaining capacity for a long time period.SOLUTION: A battery 2 comprises an outer can 10, and an electrode group 22 accommodated in the outer can 10 together with alkali electrolyte. The electrode group 22 is configured by superposing a positive electrode 24 and a negative electrode 26 via a separator 28. The negative electrode 26 at least contains zinc powder. An average particle diameter of zinc particles configuring the zinc powder is 49 to 71 μm. When the liquid amount of the alkali electrolyte is defined as A, and a theoretical capacity of the negative electrode is defined as B, a ratio A / B of the liquid amount of the alkali electrolyte to the theoretical capacity of the negative electrode is 0.30 to 0.60 mL / Ah.SELECTED DRAWING: Figure 1

The invention discloses a method for constructing a flexible zinc ion battery electrode through plasma-assisted multi-step light irradiation sintering and application of the flexible zinc ion battery electrode. According to the method, NiSe-coated MXene positive electrode slurry and zinc powder negative electrode slurry are prepared, and low-temperature plasma surface modification is combined, so that the wettability and interface bonding force of the flexible substrate are improved; and then, constructing an interdigital unsintered electrode by adopting direct-writing ink-jet printing, and introducing a multi-step light irradiation sintering process with gradually increased energy density to realize controllable sintering of the electrode material from glue discharging and necking to deep densification. The photothermal conversion characteristic of NiSe-coated MXene is fully utilized in multi-step light irradiation sintering, rapid interconnection is achieved under the low heat load condition, and solvent burst and substrate heat damage are effectively avoided. The prepared flexible zinc ion battery has low resistance, high specific capacity, good cycling stability and excellent mechanical flexibility, and is suitable for the field of flexible energy storage devices.

To easily and reliably transport electrode plates in a manufacturing process of a nickel-hydrogen storage cell.SOLUTION: A nickel-hydrogen storage cell 1 comprises a cathode plate 2. The cathode plate comprises a cathode current collector 21, which is made of a rectangular plate-shaped porous metal, and a cathode mixture layer 22, which contains a cathode active material and is filled into the cathode current collector. There is a filling density difference such that the density of the cathode mixture layer 22 filled into the cathode current collector 21 gradually decreases from a dense surface 22c to a sparse surface 22a. When the cathode plate 2 is divided into three equal parts of a first layer L1, a second layer L2 and a third layer L3 in the direction of thickness from the sparse surface 22a, the first layer and the third layer each have a filling density difference of the active material from 2% to 10% inclusive relative to the second layer L2.SELECTED DRAWING: Figure 9