63results 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.

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 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.

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 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.

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.

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 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 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.

The invention discloses a doped multi-element catalytic material as well as a preparation method and application thereof, and the preparation method of the doped multi-element catalytic material comprises the following steps: firstly, mixing an iodine source and a nitrogen source to prepare mixed powder; and then placing the mixed powder at the upstream of a reaction furnace, placing the metal phthalocyanine at the downstream of the reaction furnace, removing air in the reaction furnace, and then performing heat treatment to obtain the metal phthalocyanine. A chemical vapor deposition method is adopted, an iodine source and a nitrogen source which are located on the upstream of a reaction furnace and easy to sublimate are diffused to the surface of metal phthalocyanine on the downstream of the reaction furnace in a gaseous form in the heat treatment process and are partially adsorbed, and iodine and nitrogen element doping of the metal phthalocyanine is achieved. Vapor deposition ensures that the doped active sites are fully exposed, so that oxygen in the oxygen reduction reaction can effectively contact all the active sites, and the utilization rate of the active sites is maximized. Meanwhile, iodine and nitrogen elements are introduced to cooperatively regulate and control a metal site electronic structure, so that the power of the oxygen reduction reaction is effectively accelerated.

The present disclosure relates to a battery energy storage container. The energy storage container has a cylindrical housing and a pair of end caps disposed on opposite ends of the cylindrical housing. A diaphragm is positioned between each end cap selected from the pair of end caps and the corresponding end of the cylindrical housing. In one version, the energy storage container is configured to be installed below the ground surface for geological thermal management of the energy storage container. Embodiments of the present invention further disclose various types of electrode retainers. The energy storage container is configured for use in electrochemical battery cells, Li-ion batteries, intercalation batteries, metal-air batteries, flow batteries, fuel cells, reversible fuel cells, and capacitors.

A redox flow battery system comprising a battery cell, a positive electrode electrolyte, and a negative electrode electrolyte. A kinematic viscosity P1 of the positive electrode electrolyte and a kinematic viscosity P2 of the negative electrode electrolyte are different from each other in an operating state.

The present invention relates to a solution comprising water and different 2,2,6,6-tetramethyl-piperidinyl-oxyl (TEMPO)-derivatives, a process for the production of this solution, a process for making a redox-flow cell comprising the solution as electrolyte, the redox-flow cell comprising the solution as an electrolyte in one chamber of the cell and the use of the redox-flow cell for storing electrical energy.

A distribution arrangement (69a, 69b, 121a, 123a, 125a, 127a) is provided configured to be positioned between two corrugated heat transfer plates (5). The distribution arrangement (69a, 69b) includes a base (71) including a sheet (73) having opposite front and back surfaces (79, 81). The front surface (89) and the back surface (93) of the base (71) include at least a portion of the front surface (79) and the back surface (81) of the sheet (73), respectively. The base (71) is provided with a through secondary bore (85) extending through the front and back 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 sheet (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).

The present invention relates to a method of synthesizing 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 is carried out at a deposition current density of 500 to 2000 mA / cm2. The invention also relates to a transition metal catalyst characterized in that it is stable on a base electrode at a current density of at least 400 A / cm2 for at least 30 minutes.

There is disclosed a method for producing a concentrated VRFB electrolyte composition. The method comprises the following steps: (a) mixing a vanadium, oxide, water and aqueous H2SO4 in sufficient quantities to produce a reaction mixture comprising a vanadium sulfate at a concentration at least 3.0 M and a total sulfate concentration of at least 2 times the concentration of the vanadium sulfate; (b) maintaining the reaction mixture at an initial temperature that substantially avoids precipition of reaction solids; (c) allowing the reaction mixture to reach ambient temperature: and (d) increasing the viscosity of the reaction mixture to produce the concentrated VRFB electrolyte composition. There is also disclosed a concentrated VRFB electrolyte composition. The concentrated VRFB electrolyte is believed to provide advantages include reduced shipping costs, logistics and on-site capital costs at the facility using the VRFBs.

Provided is an aqueous redox flow battery comprising a positive electrode, a negative electrode, a posolyte chamber containing a posolyte in a solvent, a negolyte chamber containing a polysulfide based negolyte and a soluble organic catalyst in a solvent, and a separator disposed between the posolyte chamber and the negolyte chamber, wherein the soluble organic catalyst has a potential lower than the polysulfide based negolyte.

This disclosure provides redox cyclable molecules for energy storage. These molecules are either imidazothiazoles such as imidazo[2,1-b][1,3]thiazol-7-ium, pyrazoliums or 1,2-benzisothiazoles. Molecules in these families are used as anolytes in redox flow batteries. In implementations, the redox flow batteries include one or more of a catholyte, a counterion, and a supporting electrolyte.