53results about "Indirect fuel cells" patented technology

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

The present application relates to a method for recovering an aqueous positive electrode electrolyte of a redox flow battery to be recovered, said aqueous positive electrode electrolyte comprising at least one electroactive compound comprising at least one oxidized or reduced form of a reduction / oxidation pair and an aqueous solvent, the invention relates to a method for producing an electroactive compound, the reduced form of which is a water-soluble organometallic complex, characterized in that the method comprises:-a step (300) of precipitating the electroactive compound, thereby obtaining a suspension,-a step (400) of separating the suspension, thereby obtaining a solid residue (52) and an effluent (54), and-a step (600) of drying the solid residue (52), comprising heating the solid residue (52) to a temperature lower than or equal to 40 DEG C, preferably lower than or equal to 35 DEG C, more preferably lower than or equal to 30 DEG C, further preferably lower than or equal to 25 DEG C, thereby obtaining a recovered electroactive compound.

The present invention relates to redox flow battery system. In particular, the present invention relates to low-cost Zinc-polyiodide redox flow battery (ZIFBs) with a low-cost electrolyte additive and a composite membrane comprising a microporous membrane and a cation conducting membrane.

The present invention relates to the synthetic functionalization of an anthraquinone molecule substituted with at least one hydroxyl or amino group. In some aspects of the invention, a mixture containing the anthraquinone starting material, an aldehyde, a base, an optional solvent, and an optional catalyst is reacted with hydrogen, and then with an oxidizing agent. In other aspects of the invention, the synthetic functionalization of the anthraquinone molecule is carried out electrochemically, rather than chemically, using a divided electrolytic cell.

The invention relates to a redox cell, a method for storing power comprising a redox cell, a method for delivering power comprising a redox cell, an energy storage and / or delivery system, and the use of a redox cell or an energy system for storing or delivering power.

To provide a flow battery system, a battery monitoring device for the flow battery system, an electrode element for the battery monitoring device, and a manufacturing method therefor.SOLUTION: A battery monitoring device includes a positive electrode end plate, a positive electrode element that penetrates the positive electrode end plate and includes an electrode bar and a signal transmission portion protruding from the outer surface of the positive electrode end plate, a negative electrode end plate, a negative electrode element that penetrates the negative electrode end plate and includes an electrode bar and a signal transmission portion protruding from the outer surface of the negative electrode end plate, an electrolyte supply flow path, an electrolyte drainage flow path, a separator between the positive electrode end plate and the negative electrode end plate, and a voltage measurement unit.SELECTED DRAWING: Figure 2A

A method for producing hydrogen from an aqueous solution containing hydrochloric acid in dissociated form, in which at least one electrode is present, made of a metal alloy containing a plurality of metals having different standard reduction potentials, the method comprising the steps of reducing hydronium ions present in the aqueous solution to hydrogen as a result of electrons generated in the electrode flowing between the metal pair from the metal with the lower potential to the metal with the higher potential, and removing the resulting hydrogen from the aqueous solution.

The invention relates to an ion exchange liquid membrane flow battery. The ion exchange liquid membrane separates the catholyte and anolyte by independently stratifying with the catholyte and anolyte, it dissolves the supporting solute but does not dissolve active material in the catholyte and anolyte. The present invention uses the ion exchange liquid membrane to replace the traditional ion exchange solid membrane, solving the problems of high cost and short life of the latter. In addition, the technical solution of the present invention has significant advantages in preventing the crossover of active material due to the adjustable thickness of the ion exchange liquid membrane. Moreover, the technical solution of the present invention can flexibly match all kinds of acidic, neutral, alkaline aqueous or organic catholyte with anolyte according to application requirements, solving the problem of limited catholyte-anolyte match in a conventional flow battery. Furthermore, the technical solution of the present invention is advantageous for multi-cell assembly and large-scale application as the ion exchange liquid membrane has no fixed shape.

The present invention provides a cell membrane comprising: an ion exchange membrane comprising at least one first polymer exhibiting acidic functional groups A; and a fabric, wherein the fabric comprises fibers, and wherein the surface of the fibers exhibits basic functional groups C, and wherein the fabric supports the ion exchange membrane. The present invention also provides a method for manufacturing the disclosed cell membrane, a device comprising the disclosed cell membrane, and a use of the disclosed cell membrane in an electrodialysis cell, in a fuel cell, in a PEM electrolyzer, or in a redox flow battery.

Disclosed herein are a metal-air fuel cell metal source material, a composite material comprising a metal selected from an alkali metal, an alkaline earth metal, aluminium, zinc, or iron, a conductive carbon material, and a binder, a redox-mediated metal-air fuel cell cartridge comprising a cartridge housing, and a composite material comprising a metal selected from an alkali metal, an alkaline earth metal, aluminium, zinc, or iron, a conductive carbon material, and a binder, and a redox-mediated metal-air fuel cell system comprising a redox flow cell and a first tank suitable to house an anolyte and a redox-mediated metal-air fuel cell cartridge. Also disclosed herein is a method of feeding a metal in a redox-mediated metal-air fuel cell system.

Provided are flow batteries that include a fluidic train within a dynamic fluidic network system which fluidic train is convertible between a first state and a second state, the first state the first state placing a main electrolyte source and a dynamic fluidic network, outside the fluidic train and an electrode region, into fluid communication with the electrode region and the second state placing the main electrolyte source and the dynamic fluidic network, outside the fluidic train and the electrode region, into fluid isolation from the electrode region and placing the electrode region into fluid communication with a sampling segment. Also provided are methods of operating flow batteries.

The present application discloses a vanadium-chromium electrolyte, a method for producing the same, and a flow battery comprising the same. The vanadium-chromium electrolyte contains an active material and a free acid, which ionizes to become a proton conductive agent, and the active material contains at least vanadium ions and chromium ions. The present application also discloses a method for producing the vanadium-chromium electrolyte, which includes the steps of dissolving a vanadium compound in the free acid and filtering to obtain a mixed solution of the free acid and vanadium ions, electrolytically reducing vanadium to an average valence of 3.5 to 4, adding a chromium compound, stirring and dissolving, and filtering, and adding water and auxiliary reagents and adjusting the concentration to prepare the vanadium-chromium electrolyte. The vanadium-chromium electrolyte of the present application has the advantages of high vanadium utilization, high energy density, and low watt-hour cost. When applied to a flow battery, it can improve the energy density of the solution and reduce battery costs.

A device for electrolyzing seawater to produce hydrogen is disclosed. The device includes a single-pole electrolytic cell configured to operate in a cathode-cathode mode and configured to reduce the production of chlorine and / or oxygen.

The invention relates to the synthetic functionalization of an anthraquinone molecule that is substituted with at least one hydroxyl or amino group. In some aspects of the invention a mixture containing said anthraquinone starting material, an aldehyde, a base, an optional solvent, and an optional catalyst is reacted with hydrogen and then with an oxidant. In other aspects of the invention the synthetic functionalization of the anthraquinone molecule takes place electrochemically rather than chemically, through the use of a divided electrolytic cell.

Disclosed is a method for recovering the battery capacity of a vanadium redox flow battery, comprising: S100: determining the overall valence of vanadium ions in electrolyte reservoirs of the battery after the discharge capacity of the battery attenuates, and charging the battery; S200: adding a reducing agent to a positive electrolyte reservoir of the battery; S300: allowing self-circulation in the positive electrolyte reservoir of the battery, so as to complete a chemical reduction reaction; S400: determining the overall valence of the vanadium ions in the electrolyte reservoirs of the battery again, and determining the residue of the reducing agent; and / or S500: replenishing the reducing agent in the positive electrolyte reservoir of the battery, and repeating steps S300 to S400 until the mean value of the overall valence of the vanadium ions in the electrolyte reservoirs of the battery returns to 3.5. By means of using a liquid reducing agent, feeding is simplified, and the reaction rate of the reducing agent with a positive electrolyte having a high content of pentavalent vanadium is fast. The extent of the valence-decreasing reaction of the reducing agent and the residual amount of the reducing agent are strictly monitored, so that the risk of the performance of a stack being affected due to the residue of the reducing agent is reduced.

Conventional redox flow batteries may be limited by the solubility of raw materials used to form negative electrode electrolytes. Disclosed herein are methods for improving the solubility of a negative electrode electrolyte feedstock by conversion to a more soluble compound that retains the desired reactivity with a negative electrode electrolyte reagent under operating conditions.

A method of in-situ electrolyte preparation in a flow battery includes providing a vanadium-based electrolyte solution having vanadium ions of predominantly vanadium V4+ to a first electrode and a second electrode of at least one cell of a flow battery. The vanadium V4+ at the first electrode is converted to vanadium V3+ and the vanadium V4+ at the second electrode is converted to vanadium V5+ by providing electrical energy to the electrodes. A reducing agent is then provided to the vanadium V5+ at the second electrode to reduce the V5+ to vanadium V4+. The vanadium V3+ at the first electrode is then converted to vanadium V2+ and the vanadium V4+ at the second electrode is then converted to vanadium V5+ by providing electrical energy to the electrodes. A simple method to produce predominantly vanadium V4+ electrolyte from a V5+ source, such as V2O5, is also taught.

A multi-tier integrated power-to-ammonia system includes a converter for generating ammonia and heat through a reaction involving a compressed mixture of hydrogen and nitrogen gases. The system includes a steam generator that can generate steam using the heat from the reaction, and a reversible solid-oxide system in fluid communication with the steam generator that can separate the steam into oxygen gas and hydrogen gas.

The present invention refers to a redox battery, to a method of storing electricity comprising the redox battery, to a method of delivering electricity comprising the redox battery, an energy storage and / or delivery system, and to the use of the redox battery or the energy system to store or deliver electricity.

Process for recycling aqueous posolyte from a redox flow battery. The present invention relates to a process for recycling an aqueous posolyte from a redox flow battery to be recycled, the aqueous posolyte comprising at least one electroactive compound and an aqueous solvent, the electroactive compound comprising at least one oxidized or reduced form of a redox couple, the reduced form of the redox couple being a water-soluble organometallic complex, characterized in that it comprises: - a precipitation step (300) of the electroactive compound, thereby obtaining a suspension, - a separation step (400) of the suspension, thereby obtaining a solid residue (52) and an effluent (54), and - a drying step (600) of the solid residue (52), comprising heating the solid residue (52) to a temperature less than or equal to 40°C, preferably less than or equal to 35°C, preferably less than or equal to at 30°C,more preferably less than or equal to 25°C, by which a recycled electroactive compound is obtained. Figure for the abbreviation: Figure 1,

A cell stack is in which a plurality of battery cells are stacked, including an electrode of a porous body, and a bipolar plate facing the electrode, in which the bipolar plate includes an introduction portion of an electrolyte, a discharge portion of the electrolyte, and a plurality of first grooves extending from a side at which the introduction portion is disposed toward a side at which the discharge portion is disposed, each of the plurality of first grooves allows the electrolyte in each of the plurality of first grooves flow toward the discharge portion, R2 / R1 is 7×10−11 or more and 2×10−4 or less, R1 is a permeation resistance indicating a difficulty of a flow of the electrolyte in the electrode, and R2 is a permeation resistance indicating the difficulty of the flow of the electrolyte in each of the plurality of first grooves.

Conventional redox flow batteries can be limited by the solubility of raw materials that are used to form the negolyte. Disclosed herein are methods for improving the solubility of negolyte raw materials, by conversion to more soluble compounds that retain a desired reactivity with negolyte reagents under operating conditions.

The present application relates to a method for recovering an aqueous electrolyte of a redox flow battery to be recovered, said aqueous electrolyte comprising at least one electroactive compound in at least one oxidized or reduced form of a reduction / oxidation pair, the oxidized form of which is a compound comprising quinone units, and an aqueous solvent, the invention relates to a method for producing an electroactive compound, such as a benzoquinone unit, a naphthoquinone unit or an anthraquinone unit, preferably an anthraquinone unit, characterized in that the method comprises a step (300) of precipitation of the electroactive compound.

The invention relates to Redox flow battery comprising at least one electrochemical cell (CEC), a further electrochemical cell (SEC), an electrode disposed or arranged within each electrochemical half-cell, an ion-exchange membrane separating the two electrochemical half-cells of each electrochemical cell and circulating means arranged to circulate a first electrolytic media intended to be received in the battery through an electrochemical half-cell (FCEHC) of each of the at least one electrochemical cell and through an electrochemical half-cell (FSEHC) of the further electrochemical cell. One electrochemical half-cell (SSEHC) of SEC comprises at least one redox couple My / Mx insoluble in a second electrolytic media intended to be received in the SSEHC, according to formula 1 My + pe- ↔ Mx, formula 1, wherein x and y are oxidation number. The FSEHC is arranged to reduce an oxidized state Cb to a reduced state Cc, and conversely, of at least one redox couple Cb / Cc comprised in the first electrolytic media according to formula 2 Cb + ne- ↔ Cc, formula 2, wherein b and c are oxidation number. An absolute potential difference |ΔE1| between a redox potential E(Cb / Cc) of the at least one couple Cb / Cc, in a given or predetermined first electrolytic media, and a redox potential E(My / Mx) of the at least one couple My / Mx, in a given or predetermined second electrolytic media, is lower than or equal to 0.8 V.

The present invention provides a separator. More particularly, the present invention provides a multi-layered separator comprising a base layer, an optional middle layer, a top layer and an optional surface layer. Further, the present invention provides that the top layer is a polymer composite layer, wherein the polymer composite layer comprises non-functionalized or functionalized polymers, a nanomaterial, and an inorganic salt. The present invention also provides a process of preparation of the said multi-layered separator.

A redox flow battery system comprising a battery cell that charges and discharges through supply of an electrolytic liquid, a monitor cell to which the electrolytic liquid is supplied, a voltmeter that measures the open voltage of the monitor cell, a thermometer that measures the liquid temperature of the electrolytic liquid, and a control unit that controls the charging and discharging of the battery cell on the basis of the open voltage, the control unit correcting the open voltage in accordance with the liquid temperature.

The invention relates to Redox flow battery comprising at least one electrochemical cell (CEC), a further electrochemical cell (SEC), an electrode disposed or arranged within each electrochemical half-cell, an ion-exchange membrane separating the two electrochemical half-cells of each electrochemical cell and circulating means arranged to circulate a first electrolytic media intended to be received in the battery through an electrochemical half-cell (FCEHC) of each of the at least one electrochemical cell and through an electrochemical half-cell (FSEHC) of the further electrochemical cell. One electrochemical half-cell (SSEHC) of SEC comprises at least one redox couple My / Mx insoluble in a second electrolytic media intended to be received in the SSEHC, according to formula (1), wherein x and y are oxidation number. The FSEHC is arranged to reduce an oxidized state Cb to a reduced state Cc, and conversely, of at least one redox couple Cb / Cc comprised in the first electrolytic media according to formula (2), wherein b and c are oxidation number. An absolute potential difference |ΔE1| between a redox potential E(Cb / Cc) of the at least one couple Cb / Cc, in a given or predetermined first electrolytic media, and a redox potential E(My / Mx) of the at least one couple My / Mx, in a given or predetermined second electrolytic media, is lower than or equal to 0.8 V.

The invention relates to the synthetic functionalization of an anthraquinone molecule that is substituted with at least one hydroxyl or amino group. In some aspects of the invention the synthetic functionalization of the anthraquinone molecule takes place electrochemically rather than chemically, through the use of a divided electrolytic cell.

The present invention relates to a method for recycling an aqueous electrolyte of a redox flow battery to be recycled, the aqueous electrolyte comprising at least one electroactive compound and an aqueous solvent, the electroactive compound being at least an oxidized or reduced form of a redox couple, the oxidized form of which is a compound comprising a quinone unit, for example a benzoquinone unit, naphthoquinone unit or anthraquinone unit, preferably an anthraquinone unit, characterized in that it comprises a step (300) of precipitating the electroactive compound.