139results about "Aqueous electrolyte fuel cells" patented technology

Provided are an electrochemical cell and an electrochemical device that are easily manufactured and capable of retrofitting. The electrochemical cell includes: a first plate and a second plate between which an anode chamber and a cathode chamber are respectively formed on respective opposing inner surface sides thereof; and a sealing portion provided between the first plate and the second plate, in which the sealing portion includes plural frame bodies disposed at intervals from an inner side to an outer side, and plural sealing members disposed between the plural frame bodies and disposed in a compressed state between the first plate and the second plate. The electrochemical device includes the electrochemical cell.

To provide a fuel cell in one-compartment.SOLUTION: In a fuel cell, a cathode electrode made of metallic copper and a metal anode having a lower electrode potential than copper are opposed to each other in an electrolytic solution containing hydrogen peroxide, hydrogen gas is generated on the surface of the copper cathode in an electrolyte containing hydrogen peroxide, and reacts with oxygen supplied from hydrogen peroxide, and causes power generation reaction without supplying hydrogen from the outside. The configuration of the present invention can provide a novel and useful configuration as a one-compartment hydrogen fuel cell or a hydrogen peroxide fuel cell.SELECTED DRAWING: Figure 1

An ion-exchange membrane comprisinga resin composition comprisinga side-chain heteroaromatic resin having a structural unit represented by the following general formula 1:wherein,R1, R2, and R3 are each optionally the same or different, and are each a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 10 carbon atoms, or a substituted or unsubstituted aromatic hydrocarbon group having 6 to 10 carbon atoms,R4 is a direct bond, a substituted or unsubstituted divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, or a substituted or unsubstituted divalent aromatic hydrocarbon group having 6 to 10 carbon atoms, andHc is a substituted or unsubstituted heteroaromatic group having 4 to 30 carbon atoms, the group having at least one nitrogen atom in a heteroaromatic ring structure and containing a five-membered ring and / or six-membered ring structure, anda cation-exchangeable resin.

The disclosure provides redox flow batteries that have long-duration or long-lifetime for energy storage applications. The water-soluble perylene diimide based molecules can be used as energy storage materials in the anode chambers. The water-soluble ferrocene- based molecules can be used as energy storage materials in the cathode chambers. The redox flow batteries have negligible crossover rates across the membranes.

The disclosure provides batteries that have long-duration or long-lifetime for energy storage applications. In one aspect, the disclosure provides perylene diimide molecules that are water soluble and can be used as energy storage materials. In operation, the perylene diimide molecules are oxidized in an anode chamber and the electrons released in the oxidation process flow to the cathode chamber where they reduce a molecule in the cathode chamber. The perylene diimide molecules in accordance with many embodiments are highly compatible with polymeric materials that are inexpensive and easy to process, hence allowing for significantly reduced manufacturing costs.

The invention discloses an electrolyte containing a redox medium as well as preparation and application of the electrolyte. The positive electrode electrolyte and the negative electrode electrolyte comprise tetravalent or trivalent vanadium ions, mixed acid, an iron ion additive and water, the iron ion additive is composed of iron phthalocyanine and a second iron-containing compound, and the second iron-containing compound comprises at least one of ferric acetylacetonate, heme iron and iron trifluoromethanesulfonate. The preparation method comprises the following steps: activating vanadium pentoxide in mixed acid, adding water to obtain a mixed solution, and adding a reducing agent into the mixed solution to react to obtain an initial mother solution; adding an iron ion additive into the initial mother solution, and uniformly mixing to obtain a positive electrode electrolyte; and electrolyzing the initial mother liquor to obtain electrolyte containing trivalent vanadium ions, adding an iron ion additive into the electrolyte, and uniformly mixing to obtain the negative electrode electrolyte. The charge-discharge polarization is reduced by using a small amount of iron ion additive containing iron phthalocyanine; the capacity fading caused by pentavalent vanadium precipitation is released; and the energy efficiency and the cycling stability of the battery are improved.

Compounds with redox molecular cores and branched molecular tails comprising ionic functionalities for uses as electrolytes in redox flow batteries are described, as well as methods of synthesis and use thereof. The compounds have redox active perylene diimide or ferrocene molecular core decorated with the branched molecular tails having multiple ionic functionalities to improve water solubility of the molecular core, and, as such, its performance as the electrolyte.

To provide a highly durable Schottky-conjunction-based electrochemical catalyst for selective redox reactions.SOLUTION: The present invention relates to a Schottky-conjunction-based electrochemical catalyst for selective redox reactions, specifically, to a Schottky-conjunction-based electrochemical catalyst for selective redox reactions, which has effects of preventing catalyst deterioration and increasing durability by controlling a Schottky barrier such that an interface between a metal and a metal oxide that acts as a semiconductor material forms a Schottky contact to selectively induce an oxidation-reduction reaction, thereby causing only the oxidation reaction to occur in an anode that constitutes a fuel cell or water electrolyzer, and only a reduction reaction to occur in cathode.SELECTED DRAWING: Figure 1

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 disclosure relates to a combination of redox active compounds for use as redox flow battery electrolytes. Further provided herein is a kit comprising the combination, a redox flow battery, and a method using the combination, kit and / or redox flow battery of the present disclosure.

The present invention relates to an electrolyte composition improved with deep eutectic-solvents-based, for activation of an energy harvester or energy storage device.

Provided herein is an electrolyte for a battery, the electrolyte comprising: a solvent comprising water and sulfuric acid; a vanadium salt; a deprotonation inhibitor for [VO2(H2O)3]+; and a V2O5 precipitation inhibitor. Provided also are batteries comprising the electrolyte, kits comprising components of the electrolyte, a method for stabilising vanadium salts in an electrolyte by adding a deprotonation inhibitor for [VO2(H2O)3]+; and a V2O5 precipitation inhibitor.

Disclosed is a fuel cell having a Membrane Electrode Assembly (MEA) sandwiched between a pair of bipolar plates (BPPs). The BPPs are formed at least in part of a structural base layer and having one or more thermal performance layers (TPLs) in thermal contact with the structural base layer. The TPL is formed of a material having a thermal conductivity greater than that of the structural base layer.

A novel europium-cerium flow battery electrolyte and its preparation method belong to the technical field of flow battery energy storage. The theoretical voltage of the novel europium-cerium flow battery is 1.9 V, with higher energy density and power density. The synthesis strategy is to add a chelating agent to a solution containing europium or cerium. The formed chelate has a large molecular size, avoiding cross-contamination caused by the transmembrane of active ions. The presence of the chelating agent can stabilize the reduced state of metal ions and slow down the oxidation reaction of the electrolyte with oxygen. The electrolyte has a low cost, is suitable for use in a neutral environment, and europium and cerium are rare earth metals with rich resource reserves, a complete industrial chain, advanced technology accumulation, and government policy support in China. When combined with a chelating agent to enhance its own redox kinetics, it can be widely applied to photovoltaic energy storage systems and also has broad application prospects in new energy vehicles.

The invention relates to an aqueous total-iron or iron-based flow battery negative electrode electrolyte, preparation and a battery, and belongs to the technical field of electrochemical energy storage, the negative electrode electrolyte is formed by coordination of an iron-containing salt and 2-phosphonobutane-1, 2, 4-tricarboxylic acid or a compound with a similar structure, and the negative electrode electrolyte and iron ions form a stable iron coordination compound through a phosphonic acid group and a carboxylic acid group; therefore, the stability and electrochemical reactivity of iron ions in the negative electrode of the flow battery are remarkably improved, and meanwhile, the precipitation problem caused by hydrolysis or oxidation is effectively inhibited, so that the cycle life and the energy conversion efficiency of the iron-based or total-iron flow battery are effectively prolonged. The negative electrode electrolyte of the flow battery has the advantages of simple preparation process, low cost, environmental protection, no pollution and the like, is suitable for large-scale energy storage and renewable energy power systems, and has wide market prospects and application values.

Stable and high performance positive and negative electrolytes compositions to be used in red ox flow battery systems are described. The red ox flow battery system, comprises: at least one rechargeable cell comprising a positive electrolyte, a negative electrolyte, and an ionically conductive membrane positioned between the positive electrolyte and the negative electrolyte, the positive electrolyte in contact with a positive electrode, and the negative electrolyte in contact with a negative electrode. The positive electrolyte consists essentially of water, a first amino acid, an inorganic acid, an iron precursor, a supporting electrolyte, and optionally a boric acid. The negative electrolyte consists essentially of water, the iron precursor, the supporting electrolyte, and a negative electrolyte additive. The iron precursor is FeCL2, FeCL3, FeSO4, FE2(SO4)3, FeO, Fe, Fe2O3, or combinations thereof. The supporting electrolyte is LiCl, NaCl, Na2SO4, KCI, NH4CI, or combinations thereof. The negative electrolyte additive is boric acid or a combination of the boric acid and a second amino acid.

A method for a redox flow battery includes using a redox flow battery cell to store and release stored electrical energy. The using includes circulating a first electrolyte solution through a first circulation loop in fluid communication with a first electrode of the cell and a second electrolyte solution through a second circulation loop in fluid communication with a second electrode of the cell, where at least one first element from the first electrolyte solution of the first electrode permeates a separator layer and deposits in the second electrode as a first solid product, and a second element from the second electrolyte solution permeates the separator layer and deposits in the second electrode as a second solid product. The method also includes removing at least a portion of the first solid product or the second solid product from the first electrode and the second electrode, respectively.

An improved advanced hydrogen fuel cell system is described in which the anode cell includes an acidic electrolyte and the cathode cell includes an alkaline electrolyte, operation of improved advanced hydrogen fuel cell system yields an increase in the generation of fuel cell voltage in comparison to known hydrogen fuel cell. In addition, the improved advanced hydrogen fuel cell system is compatible with water electrolysis processes, in particular unipolar electrolysis of water that further increases the energy output of the system and efficiency.

A low cost, sandwich-structured thin film composite (TFC) anion exchange membrane for redox flow batteries, fuel cells, electrolysis, and other electrochemical reaction applications is described. The sandwich-structured TFC anion exchange membrane comprises a microporous substrate membrane, a first hydrophilic ionomeric polymer coating layer on the surface of the microporous substrate layer, a cross-linked protonated polyamine anion exchange polymer coating layer on top of the first hydrophilic ionomeric polymer coating layer, and a second hydrophilic ionomeric polymer protective layer on top of the cross-linked protonated polyamine anion exchange polymer coating layer. Methods of making the TFC anion exchange membrane comprises a microporous substrate membrane and redox flow battery system incorporating the TFC anion exchange membrane comprises a microporous substrate membrane are also described.

A distribution arrangement (69a, 69b, 121a, 123a, 125a, 127a) is provided that is configured to be positioned between two corrugated heat transfer plates (5). The distribution arrangement (69a, 69b) includes a base (71) including a plate (73) having opposing front and rear surfaces (79, 81). The front surface (89) and the rear surface (93) of the base (71) include at least a portion of the front surface (79) and the rear surface (81) of the plate (73), respectively. The base (71) is provided with a through secondary hole (85) extending through the front and rear surfaces (89, 93) of the base (71) so as to form a direct secondary flow path (DS) through the base (71), a non-through first secondary cavity (97) extending through the front surface (89) of the base (71), and at least one first secondary channel (101) extending inside the plate (73). The at least one first secondary channel (101) connects the secondary bore (85) and the first secondary cavity (97) to form a first transfer secondary flow path (TS1) through the base (71).

This disclosure provides a redox flow battery with long operating time or long life for energy storage applications. A water-soluble perylenediimide molecule can be used as an energy storage material in the anode chamber, and a water-soluble ferrocene molecule can be used as an energy storage material in the cathode chamber. This redox flow battery has a substantially negligible crossover rate across the membrane.

Oxygen evolution catalyst materials are provided with a pyrochlore-type structure and with (i) calcium and / or sodium as A-site elements of the pyrochlore-type structure; (ii) iridium and / or ruthenium as first B-site elements of the pyrochlore-type structure; (iii) niobium and / or tantalum as second B-site elements of the pyrochlore-type structure; and (iv) a molar ratio of A-site elements: first and second B-site elements is in the range of and including 0.8: 1 to 1:1.

Provided are a heteroaryl-pyridinium compound and a redox flow battery including the same. The redox flow battery includes a positive electrode cell including a positive electrode and a posolyte solution; a negative electrode cell including a negative electrode and a negolyte solution; and a separator disposed between the positive electrode cell and the negative electrode cell. The negolyte solution is the electrolyte solution for a redox flow battery.

Disclosed is an electro-energy or electro-synthetic cell, comprising a cathode, an anode and an electrode separator positioned between the cathode and the anode. A liquid electrolyte inlet supplies a liquid electrolyte to the cell, and a liquid electrolyte outlet removes the liquid electrolyte from the cell. The liquid electrolyte outlet comprises an overflow weir over or through which excess liquid electrolyte flows out of the cell. In another form, one or more drippers are included as part of the liquid electrolyte inlet and / or the liquid electrolyte outlet and drip chambers are positioned below the drippers. In another form, one or more porous capillary structures are located in liquid pathways in the cell, for example in a liquid pathway provided by an overflow weir or adjacent a dripper. In another form, one or more restrictors are utilised that create a pressure drop in the liquid electrolyte passing through the restrictor.

An electric energy cell or electrosynthetic cell is disclosed that includes a cathode, an anode, and an electrode separator disposed between the cathode and the anode. A liquid electrolyte inlet supplies liquid electrolyte to the cell, and a liquid electrolyte outlet drains liquid electrolyte from the cell. The liquid electrolyte outlet includes an overflow weir over or through which excess liquid electrolyte flows out of the cell. In another embodiment, one or more drip devices are included as part of the liquid electrolyte inlet and / or liquid electrolyte outlet, and a drip chamber is disposed below the drip device. In another embodiment, one or more porous capillary structures are disposed in a liquid path within the cell, such as a liquid path provided by an overflow weir or adjacent to the drip device. In another embodiment, one or more restrictors are utilized that provide a pressure drop in the liquid electrolyte through the restrictor.

An improved advanced hydrogen fuel cell system is described in which the anode chamber comprises an acidic electrolyte and the cathode chamber comprises an alkaline electrolyte, the operation of the improved advanced hydrogen fuel cell system being such that the resulting fuel cell voltage is increased compared to known hydrogen fuel cells. Furthermore, the improved advanced hydrogen fuel cell system is compatible with a water electrolysis process, particularly unipolar electrolyzed water, further increasing the energy output and efficiency of the system.

A seawater battery is disclosed. The disclosed seawater battery includes an anode electrode chamber, a flow electrode chamber, and a cathode electrode chamber.

Disclosed is a zero-gap electrochemical cell structure that employs molecular-level capillary, diffusion, and / or osmotic effects to minimize the need for macroscopic external management of the electrochemical cell. Preferably, these effects are inherently responsive to conditions in the electrochemical cell, making it self-regulating. In one example, an electrosynthesis or electric energy cell and method of operation are disclosed that includes a reservoir for containing a liquid electrolyte, a first gas diffusion electrode located outside the reservoir, and a second electrode located outside the reservoir. A porous capillary spacer is located between the first gas diffusion electrode and the second electrode, the porous capillary spacer having an end that extends into the reservoir. Preferably, the porous capillary spacer is capable of filling itself with liquid electrolyte when the end of the porous capillary spacer is in liquid contact with the liquid electrolyte in the reservoir.

The present disclosure provides a modular biodegradable battery system addressing limitations of conventional batteries. The system comprises removable energy pods, each containing a first electrode, a second electrode, separate compartments for organic material and vinegar, and an activation mechanism to mix these components into a biodegradable slurry. A reusable modular base removably couples with the energy pods. This design enables customizable power configurations while utilizing environmentally friendly materials. The activation mechanism allows on-demand power generation, overcoming shelf-life issues of pre-mixed biodegradable batteries. The modular base facilitates easy replacement of depleted pods and supports series or parallel connections for voltage or current amplification. This system offers a sustainable alternative to traditional batteries, reducing electronic waste and environmental impact.