88results about "Zinc-halogen accumulators" patented technology

A thin printed flexible electrochemical cell, and its method of manufacture, using a “picture frame” structure sealed, for example, with a high moisture and oxygen barrier polymer film and featuring, for example, a printed cathode deposited on an optional, highly conductive carbon printed cathode collector with a printed or a foil strip anode placed adjacent to the cathode. A viscous or gelled electrolyte is dispensed and/or printed in the cell, and a top laminate can then be sealed onto the picture frame. Such a construction could allow the entire cell to be made on a printing press, for example, as well as gives the opportunity to integrate the battery directly with an electronic application, for example.

A leak detection system for a flowing electrolyte battery comprising a containment member associated with at least one of a stack of a flowing electrolyte battery and an electrolyte reservoir of a flowing electrolyte battery and a sensing member for sensing a fluid leak within the containment member.

A flexible battery includes a first substrate layer with a first cell portion, a second cell portion, and a bridge portion connecting the first and second cell portions. An electrical bridge electrically couples a first electrochemical cell to a second electrochemical cell in series or parallel, and an electrical bridge is flexible and extends across the bridge portion of the first substrate layer. A second substrate layer is connected to the first substrate layer such that both of the first and second electrochemical cells are separately sealed. The flexible battery is configured to be folded over itself along the bridge portion such that the first and second electrochemical cells are arranged in a covering relationship. Optionally, an open gap area is disposed over the bridge portion of the first substrate to facilitate folding the flexible battery over itself along a line extending through the bridge portion.

An improved electrolyte battery is provided that includes a tank assembly adapted to hold an amount of an anolyte and a catholyte, a number of cell stacks operably connected to the tank assembly, each stack formed of a number of flow frames disposed between end caps and a number of power converters operatively connected to the cell stacks. The cell stacks are formed with a number of flow frames each including individual inlets and outlets for anolyte and catholyte fluids and a separator disposed between flow frames defining anodic and cathodic half cells between each pair of flow frames. The power converter is configured to connect the battery with either forward or reverse polarity to a DC power source, such as a DC bus. The anodic and cathodic half cells switch as a function of the polarity by which the battery is connected to the Dc power source.

A method for generating molecular bromine in bromide-containing electrolyte solution suitable for use in a metal bromine cell, involves chemically oxidizing bromide (Br⁻) in the electrolyte solution in an acidic environment, to produce the molecular bromine.

A recombinator device and associated method for re-acidification of an electrolyte in a flowing electrolyte zinc-bromine battery. The recombinator device receives hydrogen, formed as a result of electrolysis within cell stacks of the zinc-bromine battery, as well as aqueous bromine from the zinc-bromine battery. Upon receipt, the hydrogen and bromine are introduced into a reaction chamber in the recombinator device so as to form hydrobromic acid. The hydrobromic acid is then reintroduced back into the electrolyte of the zinc-bromine battery for re-acidification of same.

The present invention provides an aqueous electrolyte for use in rechargeable zinc-halide storage batteries that possesses improved stability and durability and improves zinc-halide battery performance. One aspect of the present invention provides an electrolyte for use in a secondary zinc bromine electrochemical cell comprising from about 30 wt % to about 40 wt % of ZnBr₂ by weight of the electrolyte; from about 5 wt % to about 15 wt % of KBr; from about 5 wt % to about 15 wt % of KCl; and one or more quaternary ammonium agents, wherein the electrolyte comprises from about 0.5 wt % to about 10 wt % of the one or more quaternary ammonium agents.

A method of forming passages of an integral manifold adjacent a cell stack of a flowing electrolyte battery provides enhanced sealing between the manifold and capillary tubes of the cell stack. The method includes forming a mould cavity adjacent the cell stack, with the mould cavity open to capillary openings of cells of the cell stack. A plurality of pins are then located in the mould cavity, with end regions of the pins being contiguous with the capillary openings. The mould cavity is then filled with material and the material is allowed to solidify into a moulded section. The pins are then removed from the moulded section, thereby forming passages in the moulded section which are in fluid communication with the capillary openings.

Solid polymer membranes comprised of a high charge density sulfonated poly (phenylene oxide) blended with poly(vinylidene fluoride) in varied ratios have improved membrane characteristics. These membranes are inexpensive and possess very high ionic conductivity, and thus are suitable for solid polymer electrolytes in electrochemical applications, especially for the polymer electrolyte membrane (PEM) fuel cell, the electrolyte double-layer capacitor, and the rechargeable zinc-halide cell. These membranes enhance the performance of these devices.

A method of forming battery electrodes with high specific surface and thin layers of active material is disclosed. The method enables low series resistance and high battery power.

An electrode plate for an energy storage device includes a current collector fabricated at least partially from an electrically conductive phosphate glass. A chemically active material may be disposed on the current collector.

An electrolyte system is provided for a rechargeable electrode zinc-halogen flow battery that utilizes a highly similar or identical electrolyte positioned on both sides of an ion-conducting membrane. The electrolyte system containing zinc salts, electrolyte conductivity enhancer, and an appropriate amount of bromine complexing agent achieves significant improvements on battery energy efficiency, self-discharge rate, and electrolyte level cycle stability over the prior art electrolyte systems.

The invention discloses a diaphragm-free static zinc-bromine battery. The battery mainly comprises a positive terminal plate with a liquid storage box, a positive current collector, a positive pole, apad frame, a negative current collector and a negative terminal plate with a liquid feeding box. On the one hand, the cost of the zinc-bromine battery can be reduced because a diaphragm is not used;on the other hand, devices such as a circulation pump and an electric valve required by an electrolyte circulation system are not used, so that system loss is reduced, and the system structure of thebattery is simpler.

The invention relates to a method for manufacturing an electrochemical battery. The method comprises the following steps: feeding a negative electrode material into a cathode chamber of the electrochemical battery when the electrochemical battery is in a base state, vacuuming the cathode chamber, and sealing up the electrochemical battery so as to isolate the electrochemical battery from an external environment. The electrochemical battery further comprises an anode chamber which is isolated from the cathode chamber through electrolyte and is in ion communication with the cathode chamber.

An electrochemical cell is presented. An anode compartment in the cell contains a sacrificial metal in an amount between about 10 volume percent and about 40 volume percent, based on the volume of the compartment. The sacrificial metal has an oxidation potential less than the oxidation potential of iron. An energy storage device including such an electrochemical cell is also provided.

The invention relates to a method for improving the performance of a zinc-iodine battery based on a halogen bond effect, which belongs to the technical field of aqueous batteries. Iodine serving as apositive electrode material of a zinc ion battery has the application advantages of rich reserves, high reaction activity and the like, but the thermal/electrochemical stability and conductivity of iodine are poor, so that the cycle life of the battery is seriously influenced. In order to improve the performance of an iodine positive electrode, the invention provides a method for better fixing iodine to the surface of a polyatomic doped carbon carrier by utilizing the halogen bond effect so as to enhance the stability/conductivity. The method specifically comprises the following steps of calcining a biomass material to convert the biomass material into a multi-atom doped porous carbon microtube, uniformly mixing iodine with the carbon microtube, and heating to obtain the iodine/carbon microtube composite material. The thermal stability of the compound is remarkably enhanced, and the zinc storage reversible specific capacity and the cycling stability of the compound are greatly improved. The method is simple and efficient, the obtained composite material is more stable in physicochemical property and obvious in battery performance improvement effect, and has potential practical value and commercial prospect.

The invention discloses a preparation method of a long-cycle-life aqueous zinc secondary battery negative electrode, and belongs to the technical field of zinc secondary batteries. The preparation method comprises the following steps: firstly, carrying out chemical replacement reaction on zinc and metal salt to deposit a metal simple substance on the zinc metal surface and further to obtain a zincmetal surface covered solid electrolyte precursor; covering a solid electrolyte precursor on the surface of zinc metal to serve as a negative electrode to assemble a battery; and after the solid electrolyte precursor material is subjected to in-situ electrochemical cycle activation, generating solid electrolyteon the surface of zinc metal in situ, and obtaining the zinc secondary battery negativeelectrode material. The obtained zinc/solid electrolyte electrode has a large actual electrochemical active area and high mechanical stability, and meanwhile, the solid electrolyte isolates zinc metal from liquid electrolyte, so that the defects of active metal corrosion, surface passivation, dendritic crystal growth and the like of a traditional zinc metal electrode are inhibited, and the cycling stability of an electrode material is improved.

The invention relates to a preparation method and application of a high-stability zinc-iodine battery and an electrode material. The electrode material comprises a covalent organic framework compound and active iodine, wherein the active iodine is loaded in a pore structure formed by the covalent organic framework compound. The preparation method comprises the steps of mixing the covalent organic framework compound with active iodine, and carrying out heating treatment in a tubular furnace to obtain the composite material. The iodine positive electrode is effectively stabilized, and the electrochemical performance of the zinc-iodine battery is improved. The material has good electrochemical performance, and has the characteristics of good capacity and Coulombic efficiency retention in the cycle process.