170results about "Aqueous electrolyte fuel cells" patented technology

The invention provides a method for removing sulfur ions in water by coupling a piezoelectric catalytic fuel cell with oxygen oxidation, and belongs to the technical field of wastewater treatment. The method is characterized in that a Fe-coated MoS2 / CFC piezoelectric catalytic electrode is prepared by a one-step hydrothermal method, and a piezoelectric catalytic fuel cell enhanced air oxidation system is constructed based on the electrode. The method has the advantages that 91% (-14.7 mg) of sulfur ions (S < 2->) can be removed within 1.5 h by utilizing the piezoelectric catalytic fuel cell and only aerating, and the system has excellent piezoelectric catalytic activity, has the characteristics of high efficiency and greenness in sulfur ion removal, and has a good application prospect in the fields of catalytic fuel cells and advanced oxidation treatment of wastewater.

To provide a stabilized solid garnet electrolyte article, a method of making the stabilized solid garnet electrolyte article, and a method for using the stabilized solid garnet electrolyte article in an energy storage device.SOLUTION: A solid garnet composition comprises: a bulk composition consisting of or consisting essentially of a lithium garnet; and a surface composition consisting of or consisting essentially of a surface protonated garnet on at least a portion of the exterior surface of the lithium garnet, wherein the surface composition is compositionally stable in air and insensitive to carbon dioxide.SELECTED DRAWING: None

The invention discloses a similar mixed redox electrolyte and an aqueous organic flow battery, and belongs to the technical field of organic flow batteries. The similar mixed redox electrolyte can be used for a positive electrode or a negative electrode, at least two cyclic nitroxide free radical active substances are introduced into the positive electrode electrolyte, and at least two viologen active substances are introduced into the negative electrode electrolyte. Derivative molecules with different substituent groups or bridging atoms but the same type are introduced into a positive electrolyte and a negative electrolyte respectively, and the same charge groups or charged atoms are carried in the substituent groups, so that the molecular structure is stabilized by increasing the intermolecular distance or weak interaction of hydrogen bonds and the like through intermolecular electrostatic repulsive force; the distribution state of molecules in the solution is regulated and controlled, the molecular aggregation behavior is reduced, and the battery capacity and the cycling stability are improved. The introduction of the charged active substance can enhance the rate capability of the battery, is beneficial to the realization of higher power density, and provides a new idea for the design and application of the high-performance aqueous organic flow battery.

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

Disclosed is an electrolyte solution for redox flow batteries, the electrolyte solution including: a substance that contains metal ions; a water-soluble polymer that has a coordination part in a side chain; and an aqueous solvent. The coordination part forms a metal complex by coordinating with a metal ion.

The invention discloses a novel europium-cerium flow battery electrolyte and a preparation method thereof, and belongs to the technical field of flow battery energy storage. The theoretical voltage of the novel europium-cerium flow battery is 1.9 V, and the novel europium-cerium flow battery has higher energy density and power density. According to the synthesis strategy, a chelating agent is added into a solution containing europium or cerium, the molecular size of the formed chelate is large, and cross contamination caused by active ion transmembrane is avoided. The chelating agent can stabilize the reduction state of metal ions and slow down the oxidation reaction between the electrolyte and oxygen. The electrolyte is low in cost and suitable for being used in a neutral environment, europium and cerium are rare earth metals, have rich resource reserves, a complete industrial chain, advanced technical accumulation and policy support of the government in China, are matched with a chelating agent to improve oxidation-reduction kinetics, can be applied to a photovoltaic energy storage system on a large scale, and has a wide application prospect. Wide application prospects are also realized in the aspect of novel power automobiles.

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 electrolyte, a method for producing the electrolyte, and a flow cell battery are provided. The electrolyte contains about 1.0 M to about 1.5 M iron ions and about 1.0 M to about 1.5 M vanadium ions.

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.

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).

The invention relates to a rechargeable aqueous ZnIS flow battery system. The system includes a cathode side including an electrode material and a first storage tank providing a catholyte, where the catholyte includes zinc iodide and soluble starch, thereby forming an electrolyte having aggregated colloidal nanoparticles; an anode side comprising the electrode material and a second storage tank providing an anolyte; and a diaphragm positioned between the cathode and the anode. And the anolyte and the catholyte flow between the cathode and the anode through a peristaltic pump. The present invention provides a system for further developing colloidal electrolyte chemistry for LPPM-based flow battery systems to achieve power cost-effective and high temperature large scale energy storage.

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.