103results 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.

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.

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 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.

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.

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 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.

This invention discloses a fluoropiperidine nitroxide radical derivative, a positive electrode electrolyte containing the same, and its applications. The fluoropiperidine nitroxide radical derivative is a compound represented by Formula I. The piperidine nitroxide radical derivative of this invention exhibits high stability and high solubility as a positive electrode active material in organic flow batteries, showing promising application prospects.

The present disclosure generally relates to redox mediators or catalysts for various uses, such as in redox flow batteries. The redox mediator may be a 2,2,6,6-tetramethylpiperidine-l-oxyl or TEMPO-based redox mediator in aspects. In certain cases, such redox mediators may be useful in electrochemical devices, for example, in a battery such as a flow battery. In some embodiments, the flow battery may be based on bromide or another halide, e.g., acting as a catholyte. Other aspects are generally directed to flow batteries containing such redox mediators, methods of making or using such redox mediators, kits involving such redox mediators, or the like.

The application relates to a cation vacancy-rich heterojunction catalytic material and a preparation method and application thereof. The cation vacancies in the catalytic material can effectively adjust the electronic properties of a host material, thereby promoting charge transfer and redox reaction kinetics, and can also serve as additional host sites for inserting protons or alkali metal cations, promoting ion diffusion during electrochemical cycles; the formed cation vacancies can also expose more active sites, improve conductivity, promote mass transfer during the reaction, and thus improve the reaction catalytic activity. In the preparation method, the hydrothermal method process is simple, energy consumption is low, and the method is suitable for a wide range of applications. Raw materials are cheap and easy to obtain, the obtained product has good crystallinity, and the yield is high. The low-temperature reaction consumes less phosphating chemicals, has relatively low energy consumption, and has a higher safety factor.

The present disclosure provides an electrochemical cell and an electrochemical device which are easy to manufacture and can be retrofitted. This electrochemical cell is provided with: a first plate and a second plate, each of which forms an anode chamber and a cathode chamber on the inner surface side facing each other; and a sealing part provided between the first plate and the second plate, the sealing part having: a plurality of frames arranged at intervals from the inside toward the outside; and a plurality of seals disposed between the plurality of frames and disposed between the first plate and the second plate in a compressed state. In addition, the electrochemical device also comprises the electrochemical cell.

The present invention relates to novel combinations of redox active compounds for use as redox flow battery electrolytes. The invention further provides kits comprising these combinations, redox flow batteries, and method using the combinations, kits and redox flow batteries of the invention.

The present disclosure provides redox flow batteries with long duration or long life for energy storage applications. The water-soluble perylene diimide molecule can be used as an energy storage material in an anode chamber. The water-soluble ferrocenyl molecules can be used as energy storage materials in cathode chambers. The redox flow battery has a negligible cross permeability across the membrane.

This invention discloses a homogeneous mixed redox electrolyte and an aqueous organic flow battery, belonging to the field of organic flow battery technology. The homogeneous mixed redox electrolyte can be used as either the positive or negative electrode. The positive electrode electrolyte incorporates at least two cyclic nitrile radical-based active materials, and the negative electrode electrolyte incorporates at least two viologen-based active materials. By introducing derivative molecules of the same type but different substituents or bridging atoms into the positive and negative electrode electrolytes, and utilizing the same charged groups or atoms in the substituents, the intermolecular distance is increased through electrostatic repulsion or weak interactions such as hydrogen bonds to stabilize the molecular structure, regulate the molecular distribution in solution, reduce molecular aggregation, and improve battery capacity and cycle stability. The introduction of charged active materials can enhance the battery's rate performance, facilitating higher power density and providing new ideas for the design and application of high-performance aqueous organic flow batteries.

The present invention relates to method for the synthesis of a transition metal catalyst consisting of electrodeposition on a substrate electrode from an electrolyte solution comprising at least one transition metal precursor, wherein the electrodeposition takes places at a deposition current density of 500 to 2000 mA / cm2. The present invention further relates to a transition metal catalyst characterised in that it is stable for at least 30 minutes at a current density of at least 400 mA / cm2 on the substrate electrode.