22results about "Alkaline accumulators" patented technology

This electrolyte solution for alkali metal secondary batteries contains a nonaqueous solvent, an alkali metal salt that is dissolved in the nonaqueous solvent, and an alkaline earth metal salt that is dissolved in the nonaqueous solvent.

The application provides a metal organic polyhedral cross-linked gel electrolyte and a preparation method and application thereof, and belongs to the technical field of secondary batteries and polymer electrolytes.The metal organic polyhedral cross-linked gel electrolyte is composed of a chemical cross-linked network, a zinc salt and a solvent; the chemical cross-linked network is constructed by a first polymer and a metal organic polyhedron through coordination bonding; and the metal organic polyhedral cross-linked gel electrolyte further comprises a second polymer interpenetrating in the chemical cross-linked network to form a semi-interpenetrating network structure.The cross-linked network structure of the gel electrolyte is stable and uniform, and structural defects of a traditional MOPs-based electrolyte are completely avoided; mechanical properties and toughness are synergistically improved, zinc negative electrode dendrite growth is effectively inhibited; low-temperature electrochemical performance is excellent, and application limitations of zinc-based batteries under extreme working conditions are broken through; an electrochemical cycle life is super-long, and excellent long-term service stability is exhibited; and dual-function characteristics are combined, and the preparation efficiency and use safety of zinc-based batteries are improved.

The seal assembly for a battery cell includes a grommet having an opening with an inner surface. The nail has a nail head and a stem extending from the nail head. The stem includes a first portion having a larger diameter and a second portion having a smaller diameter, and the stem extends through the opening in the grommet. The stem and the grommet form a first interference fit at a distal end of the opening. A trap gap is formed between the distal end of the opening and the nail head. The trap gap defines a trap for a sealant. The sealant is disposed on the stem and is at least partially located within the trap.

An electrolyte composition for a Zn-MnO2 electrochemical device said electrolyte comprising water, zinc sulphate and urea, its use and an electrochemical device comprising said electrolyte.

A charger for a plurality of cells comprises a plurality of cells, a plurality of DC power sources, a common DC source in electrical communication with each of the plurality of DC power sources, and a CPU configured to selectively control the connection between each DC power source and the corresponding cell. Each DC power source of the plurality of DC power sources is selectively connectable to a corresponding cell of the plurality of cells.

To provide a battery that has an aqueous electrolyte and has excellent discharge characteristics at low temperatures.SOLUTION: A battery according to the present invention includes a negative electrode having at least one metal selected from the group consisting of zinc, aluminum, magnesium, and alloys thereof as an active material, and an aqueous electrolyte solution, and the electrolyte solution is an aqueous solution containing an electrolyte salt, which is a salt of a weak acid and a strong base and has a solubility of 100 g or more in 100 g of water at 0°C, at a concentration of 10 mass% or more. It is preferable that the electrolyte solution further contains a salt of a strong acid and a weak base.SELECTED DRAWING: Figure 1

Provided is a battery including a positive electrode; a negative electrode; an electrolytic solution being an aqueous alkali metal hydroxide solution; and a layered double hydroxide (LDH)-like compound provided so as to be in contact with the electrolytic solution. A metal compound containing at least one metal element constituting the LDH-like compound is dissolved in the electrolytic solution such that erosion of the LDH-like compound by the electrolytic solution is suppressed.

This specification provides phosphorus cell electrolyte additive chemicals for use in aqueous batteries, which prevent self-discharge in the form of corrosion and hydrogen generation, improve battery efficiency, and extend storage life.

Disclosed is a technology where, when a current collector containing Al is used in an aqueous battery, elution of Al from the current collector into an aqueous electrolyte solution can be suppressed. The aqueous battery of the present disclosure includes a positive electrode, an aqueous electrolyte solution, and a negative electrode. One or both of the positive electrode and the negative electrode has / have a current collector containing Al. The current collector is in contact with the aqueous electrolyte solution. The aqueous electrolyte solution contains water, potassium polyphosphate dissolved in the water, and a silicic acid salt dissolved in the water.

This application relates to a separator for alkaline batteries, its preparation method, and its application, belonging to the field of electrochemical device technology. It includes a porous base membrane and a gel precursor layer coated on at least one surface of the porous base membrane. By introducing a phase separation initiator that can be triggered by a specific concentration of alkaline electrolyte, the gel precursor layer coated on the base membrane undergoes in-situ phase separation only after battery electrolyte injection. This integrates the most complex porous structure forming step into the battery assembly process, simplifying the separator's manufacturing process. More importantly, this in-situ phase separation process allows the polymer matrix to form a gel functional layer with a three-dimensional interconnected pore structure at the electrode interface under liquid-phase mass transfer and thermodynamic drive. This achieves molecular-level interpenetration and conformal fusion with the electrolyte and electrode surface microstructure, reducing solid-solid interface contact impedance and constructing continuous, uniform, and efficient ion transport channels, thereby improving the battery's discharge capacity and overall electrochemical performance.

This application discloses an intramolecular hydrogen bond-enhanced anthraquinone derivative, its synthesis method, and its application, relating to the field of electrochemical energy storage. The acetic acid-modified anthraquinone RH-DA or AE-DA is 2,2'-(3-carboxyl-1,8-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2,7-diyl)diacetic acid and 2,2'-(1,8-dihydroxy-3-(hydroxymethyl)-9,10-dioxo-9,10-dihydroanthracene-2,7-diyl)diacetic acid. Rhein or aloe-emodin is dissolved in NaOH, glyoxylic acid solution and sodium dithionite are added, and after stirring, sodium dithionite is added again. After stirring and cooling to room temperature, hydrogen peroxide solution and HCl solution are added, causing precipitation. After washing with HCl, the precipitate is dried in a vacuum drying oven to obtain a black-green solid RH-DA or a yellow-green solid AE-DA. Its application in alkaline aqueous organic flow batteries is also disclosed.

The present invention relates to a low-dimensional tellurium iodide perovskite structure. The low-dimensional structure, specifically an organic-inorganic hybrid benzyltriethylammonium tellurium iodide ((BzTEA)2TeI6), enables a highly efficient eleven-electron transfer process involving redox pairs of Cl0 / Cl−, I+ / I0 / I−, and Te6+ / Te4+ / Te0 / Te2−. This innovative perovskite structure confines both chalcogen and halogen elements, effectively mitigating the shuttle effect and enhancing stability by spatially restricting active species within the lattice. The Zn∥(BzTEA)2TeI6 battery with the (BzTEA)2TeI6 cathode exhibits a high capacity of at least 450 mAh g−1Te / I and a large energy density of 577 Wh kg−1Te / I at 0.5 A g−1, with capacity retention up to 77% and 82% after 500 cycles at 1 A g−1 and 3 A g−1, respectively. The pouch cell having a capacity of 113 mAh further confirms the feasibility of the perovskite cathode. The present invention sheds light on the design of high-energy batteries based on chalcogen-halide perovskite cathodes with rich chemistry.

This application discloses a multi-electron transfer polynuclear quinoxaline derivative and its synthesis method and application, relating to the field of electrochemical energy storage. The method involves dissolving cyclohexanehexaone octahydrate and 4,5-dichloro-1,2-phenylenediamine or 4-chloro-1,2-phenylenediamine in a mixed solution of glacial acetic acid and anhydrous ethanol. The solution is refluxed and stirred at high temperature under N2 protection for 24 hours. The product is then refluxed and stirred at high temperature in dilute nitric acid for 3 hours to obtain intermediate products HATN-HC or HATN-TC. HATN-HC or HATN-TC, potassium tert-butoxide, mercaptopropionic acid, manganese dioxide, and 15-crown ether-5 are added to anhydrous ethanol. The mixture is stirred and reacted at 70°C under N2 protection for 24 hours. The product is filtered, washed, and acidified, then dried at 60°C in a vacuum oven to obtain HATN-HSPA or HATN-TSPA. The application of the multi-electron transfer polynuclear quinoxaline derivative in alkaline aqueous organic flow batteries is also discussed.

A rechargeable aqueous Mg battery is composed of a Mg metal anode, a solid-state aqueous polymer-based electrolyte, and an intercalation-type Prussian blue analogue cathode for ion storage. During battery operation, the Mg anode undergoes dissolution and deposition, while Mg ions in the electrolyte inserts and extracts from the cathode lattice, thereby releasing energy during discharge and storing energy during charge.

According to one aspect, an additive for an iron negative electrode of an alkaline electrochemical cell may include a powder of discrete granules including agglomerated particles, the agglomerated particles including at least one metal sulfide.

Disclosed is a technology where, when a current collector containing Al is used in an aqueous battery, elution of Al from the current collector into an aqueous electrolyte solution can be suppressed. The aqueous battery of the present disclosure includes a positive electrode, an aqueous electrolyte solution, and a negative electrode. One or both of the positive electrode and the negative electrode has / have a current collector containing Al. The current collector is in contact with the aqueous electrolyte solution. The aqueous electrolyte solution contains water, potassium polyphosphate dissolved in the water, and a silicic acid salt dissolved in the water.

This invention discloses a fully CNC machining method and apparatus for zinc-silver battery electrode skeletons, belonging to the field of zinc-silver battery manufacturing technology. The apparatus includes a mechanical execution unit, an intelligent control unit, and a human-machine interface unit. The mechanical execution unit employs an upper tool driven by X-axis and Z-axis linear modules in conjunction with a fixed lower tool, and a separate feeding mechanism for Y-axis feeding, forming a three-axis CNC system. The intelligent control unit precisely controls the movement of each axis according to parameters input from the human-machine interface unit, achieving automatic tool setting, automatic meshing, and automatic cutting. The method of this invention includes a first-piece trial production and compensation step, which can automatically correct dimensional deviations caused by factors such as material springback. This invention solves the problems of poor accuracy, difficult adjustment, and poor product consistency in existing mechanical machining methods, achieving high-precision, high-stability, and high-efficiency machining of electrode skeletons, effectively saving the cost of precious metal materials.

Disclosed is a technique capable of suppressing elution of Al from a current collector into an aqueous electrolyte solution when the current collector containing Al is used in an aqueous battery. This aqueous battery has a positive electrode, an aqueous electrolyte solution, and a negative electrode. One or both of the positive electrode and the negative electrode has a current collector containing Al. The current collector is in contact with the aqueous electrolyte solution. The aqueous electrolyte solution contains water, potassium polyphosphate dissolved in the water, and silicate dissolved in the water.

This invention discloses a technology that can suppress the leaching of Al from a current collector into an aqueous electrolyte when an Al-containing current collector is used in an aqueous battery. [Solution] The aqueous battery of the present disclosure has a positive electrode, an aqueous electrolyte, and a negative electrode. One or both of the positive electrode and the negative electrode have a current collector containing Al. The current collector is in contact with the aqueous electrolyte. The aqueous electrolyte contains water, potassium polyphosphate dissolved in the water, and silicate dissolved in the water.