176 results about "Redox active" patented technology

Described herein are variations of an analyte monitoring system, including an analyte monitoring device. For example, an analyte monitoring device may include a skin-penetrating microneedle array for use in measuring analyte, such as in a continuous manner. The microneedle array may include, for example, at least one microneedle comprising a working electrode comprising an analyte-sensing aptamer that selectively and reversibly binds to analyte. The working electrode comprises at least one thiol-based passivation molecule that provides protection of the working electrode from, by way of example, foulants and interferents. For example, a sensor may be configured to generate a signal that is indicative of a concentration of an analyte in a fluid, the sensor comprising a working electrode comprising an electrode material, a biorecognition layer disposed at least partially on the electrode material and comprising a biorecognition element that selectively and reversibly binds to an analyte, and an at least partially desiccated hydrogel disposed on the biorecognition layer. For example, a working electrode may be configured to generate a signal indicative of a concentration of an analyte in a fluid, the working electrode comprising an electrode material, a biorecognition element disposed on the electrode material that selectively binds to the analyte, wherein the biorecognition element is functionalized with a redox-active molecule and is configured to change conformation upon binding the analyte to move the redox-active molecule, closer to, or further from, the electrode material, and a passivation element comprising a zwitterionic peptide disposed on the electrode material.

The invention provides a low-cost flow battery and an application thereof, a redox active substance of a positive electrode electrolyte of the low-cost flow battery contains a hydroxylamine cyclic structure group with hindered amine, and the hydroxylamine cyclic structure group with hindered amine is preferably selected from 1-hydroxy-2, 2, 6, 7, 8-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, one or more of a 1-oxo-2, 2, 6, 6-tetrasubstituted piperidine group, a 1-oxo-2, 2, 6, 6-tetrasubstituted piperidine group, a 1-oxo-2, 2, 6, 6-tetrasubstituted piperidine group, and a 1-oxo-2, 2, 6, 6-tetrasubstituted piperidinium group; a redox active substance of the negative electrode electrolyte contains one or more of a titanium element, a vanadium element, a chromium element, an iron element and a zinc element. The low-cost flow battery has the advantages of high output voltage, high energy density, environment friendliness and low cost, and has good application prospects and large-scale popularization potential in the field of energy storage.

The present invention relates to novel lignin-derived compounds and compositions comprising the same and their use as redox flow battery electrolytes. The invention further provides a method for preparing said compounds and compositions as well as a redox flow battery comprising said compounds and compositions. Additionally, an assembly for carrying out the inventive method is provided.

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.

The invention discloses a preparation method and application of an HPW and Ru co-modified CeO2 porous nanorod catalyst, and belongs to the technical field of catalytic materials. The method comprises the following steps: (1) preparing cerium dioxide porous nanorods; (2) loading HPW on the cerium dioxide porous nanorod to obtain CeO2-HPW; and (3) loading Ru nano particles on the CeO2-HPW, so as to obtain the CeO2 porous nanorod catalyst Ru / CeO2-HPW co-modified by the HPW and the Ru. The catalyst disclosed by the invention is of a porous rod-like structure and has the characteristics of high pore diameter, high acid capacity, multiple oxidation-reduction active sites, water vapor resistance and the like. The catalyst disclosed by the invention is applied to the catalytic oxidation reaction of 1, 2-DCE, and shows excellent catalytic performance at 90% conversion rate temperature T90 of 273 DEG C, the carbon dioxide mineralization rate of 1, 2-DCE reaches 90% at 279 DEG C, and the generation of by-products is reduced.

The application provides a low-cost flow battery and application thereof, and the low-cost flow battery contains a hydroxylamine cyclic structure group with a hindered amine in a redox active material of a positive electrolyte of the low-cost flow battery, the hydroxylamine cyclic structure group with the hindered amine is preferably one or more of a 1-hydroxyl-2,2,6,6-tetrasubstituted piperidine group, a 1-oxygen radical-2,2,6,6-tetrasubstituted piperidine group and a 1-oxo-2,2,6,6-tetrasubstituted piperidinium group; and the redox active material of a negative electrolyte of the low-cost flow battery contains one or more of titanium elements, vanadium elements, chromium elements, iron elements and zinc elements. The low-cost flow battery has the advantages of high output voltage, high energy density, environmental friendliness and low cost, and has good application prospect and large-scale promotion potential in the field of energy storage.

Described herein are variations of a sensor configured to generate a signal that is indicative of a concentration of an analyte in a fluid. The sensor may include a working electrode comprising an electrode material, a biorecognition layer disposed at least partially on the electrode material and comprising a biorecognition element that selectively and reversibly binds to an analyte, and an at least partially desiccated hydrogel disposed on the biorecognition layer. In some variations, the biorecognition element may be functionalized with a redox-active molecule and is configured to change conformation upon binding the analyte to move the redox-active molecule, closer to, or further from, the electrode material. In some variations, the biorecognition element may be an aptamer.

The invention relates to a heterogeneous polyelectrolyte self-assembled membrane as well as a preparation method and application thereof. In the flowing process of the electrolyte of the flow battery, the polyanion compound in the electrolyte on one side and the polycation compound in the electrolyte on the other side are self-assembled on the glass fiber substrate in the middle under the action of strong electrostatic adsorption to form the diaphragm of the flow battery, namely the heterogeneous polyelectrolyte self-assembled membrane. The microporous membrane has good mechanical properties and ionic conductivity, and the formed microporous membrane structure can effectively inhibit interpenetration and mixing of redox active molecules in the flow battery. The aqueous flow battery system assembled by the heterogeneous polyelectrolyte self-assembled membrane and typical oxidation-reduction active organic molecules still keeps the initial capacity of 97% or above after 2000 charge-discharge cycles. Compared with the prior art, the heterogeneous polyelectrolyte self-assembled membrane provided by the invention can effectively inhibit capacity attenuation caused by permeation and cross mixing of electrolyte redox active molecules in an aqueous flow battery through the membrane.

The invention discloses a synthesis method and application of a redox cation covalent organic framework, and belongs to the technical field of functional adsorption materials. 2, 5-dihydroxy benzaldehyde and triamino guanidine chloride are used as reaction monomers, a covalent organic framework is constructed through a Schiff alkali condensation reaction, guanidyl cation sites are synchronously introduced, hydroxyl redox active groups are reserved, and a redox cation covalent organic framework (AGS-TPA-OH) uniformly-distributed high-density guanidyl salt cation and hydroquinone active unit is prepared. Cr2O7 < 2-> is efficiently captured through electrostatic interaction. The synthesis method is green and efficient, the adsorption capacity of the obtained AGS-TPA-OH on Cr2O7 < 2-> reaches 4377.25 mg / g, the removal rate in 50 minutes exceeds 98%, an innovative solution is provided for efficient treatment and resource recycling of hexavalent chromium in industrial wastewater, and the method has remarkable environmental and economic benefits.

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.

The present invention discloses a diazine-based organic negative electrode material for aqueous alkaline batteries and its application, relating to the field of battery technology. This type of organic negative electrode has an electrochemical redox active center with a nitrogen-nitrogen double bond (N=N), including but not limited to azobenzene; azobenzene modified with at least one of halogen, methyl, and nitro functional groups; benzo[c]cinnoline; and benzo[c]cinnoline modified with at least one of halogen, methyl, and nitro functional groups. The organic negative electrode material provided by the present invention can operate stably under various alkaline conditions and is compatible with nickel hydroxide positive electrodes and air positive electrodes. The material has excellent rate performance and long-term cycle stability, and its wide source makes it suitable for large-scale application.

A temperature sensing apparatus having an electrode with an associated redox-active polymer. The electrode is connected to circuitry which applies an interrogating electrical potential waveform. The circuitry measures an electrical current resulting from application of the electrical potential waveform. The measured electrical current is processed to determine the temperature of a solution contacting the electrode. The apparatus may further comprise an analyte sensing redox-active polymer for sensing the amount of an analyte in the solution.

The present invention relates to electrolyte compositions comprising distinct redox-active compounds, namely, a redox-active compound, which is phenazine or a phenazine derivative, and a distinct redox-active compound, which is not phenazine or a phenazine derivative. The present invention also relates to the use of such electrolyte compositions as redox flow battery electrolytes. Accordingly, the invention further provides a redox flow battery comprising said compositions.

A method of bonding first and second substrates to each other the substrates having respective bonding surfaces to be bonded together, comprising:(a) applying to the bonding surface of at least the first substrate a redox-active metal catalyst primer to form a primed surface;(b) activating the primed bonding surface of the first substrate by exposing the primed bonding surface to actinic radiation;(c) applying, to the so activated bonding surface of the first substrate, and / or or to the bonding surface of the second substrate, a UV curable anaerobic adhesive;(d) mating the bonding surfaces together with the UV curable anaerobic adhesive therebetween; and(e) exposing the UV curable anaerobic adhesive between the mated surfaces to actinic UV radiation. The method is particularly suited for obtaining bonds with good tensile shear strength with electrical substrates coated with an insulating varnish.

The application discloses a trifluoromethyl alkyl quinoline compound, a synthesis method and anti-tumor application in the field of organic synthesis and medicinal chemistry, which is synthesized from trifluoropropylene quinoline or N-benzoyl pyrrole (A) and redox active ester (B) as raw materials, dimethyl sulfoxide as a solvent, dihydropyridine as an electron donor, and under visible light irradiation, a trifluoromethyl alkyl quinoline and analogues (C) are synthesized at a high yield. The specific reaction formula is as follows: The compounds provided by the application all have excellent anti-tumor activity and low toxicity to normal cells, and therefore have application prospects for preparing anti-tumor drugs.

Disclosed is an electrode precursor composition suitable for preparing a gel electrode, the composition comprising an organic solvent, an alkali metal salt, an electrically insulating polymer, and a redox-active organic component, where the redox-active organic component is present at a smaller volume fraction than the electrically insulating polymer. The redox active organic component may be present in the electrode precursor composition in an amount of between 1 and 20 vol% based on the total volume of the electrode precursor composition. The redox-active organic component may be present in the electrode precursor composition in an amount of up to 8% by volume based on the total volume of the electrode precursor composition. The redox active organic component may be a redox active polymer.

The present disclosure provides for organic battery electrodes and dual-ion batteries. In an aspect, the present disclosure provides for electrodes (e.g., cathodes, anodes) that include a carbon fiber sheet that includes a non-conjugated redox-active polymer(s) (RAP) (e.g., a layer of the non-conjugated redox-active polymers). The electrodes can be used in dual-ion batteries. In an aspect, the dual-ion batteries can operate at lower temperatures (e.g., about 0° or less) than other battery types such as rocking-chair batteries.

Provided herein hybrid organic-inorganic redox active materials and related composites, compositions, electrode materials, electrodes electrochemical cells, batteries, methods and systems, which, can be used as to provide high performance cathode active materials in high capacity, high energy density, safe, and long-lasting electrochemical cells and batteries when coupled with Li, Na, K, graphite, lithiated graphite, in situ lithiated graphite, silicon, lithiated silicon, in situ lithiated silicon, silicon-graphite, in situ lithiated silicon-graphite, hard carbon, sodiated hard carbon, graphite-silicone, lithiated graphite-silicon etc. anodes in non-aqueous electrolytes.

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 invention belongs to the field of metal ion battery material synthesis, and particularly provides a sulfur-doped oxygen-nitrogen-enriched conjugated organic material and application thereof in Li < + > / Zn < 2 + > ion batteries. The preparation method comprises the following steps: firstly, preparing 2, 3, 8, 9, 14, 15-hexachlorodiquinoline [2, 3-a: 2 ', 3'-c] phenazine (HANT-Cl) by taking cyclohexanehexone and dichlorobenzene diamine as raw materials, and then synthesizing 6S6O and the derivative thereof by taking HATN-Cl, sodium sulfide nonahydrate and a naphthoquinone derivative as raw materials. The obtained electrode material contains a plurality of oxidation-reduction active sites, multi-electron storage can be carried out, the transfer rate of electrons is improved through the large pi conjugated structure of the conjugated quinoneazine material, and therefore the high theoretical specific capacity and the excellent rate performance are achieved. Due to the addition of the sulfur element, the oxidation-reduction potential of the material is improved, the energy density of a battery can be improved, and the material has a wide application prospect in a Li < + > / Zn < 2 + > ion battery system.

This invention relates to the field of supercapacitor electrode materials, particularly bimetallic materials, and more specifically to nitrogen-doped nickel-cobalt bimetallic porous carbon composite materials, their preparation, and applications. The nitrogen-doped nickel-cobalt bimetallic porous carbon composite material is obtained by synthesizing a precursor via a hydrothermal method using 1,2,4-triazole-3-carboxylic acid as a ligand, followed by calcination at 600℃. This composite material contains abundant redox active sites and excellent conductivity, especially exhibiting excellent electrochemical performance under a 1:1 nickel-cobalt molar ratio. Experiments show that when the nickel-cobalt molar ratio is 1:1 during MOF synthesis, the obtained NC / NiCo1 / 1 exhibits excellent electrochemical performance at a mass ratio of 1.0 A g. ‑1 Below this, the specific capacitance can reach 595.76 F g. ‑1 It also exhibits excellent cycling performance, retaining 92.30% of its specific capacitance after 3000 cycles, and its specific surface area can reach 68.87 m². 2 g ‑1 .

The invention discloses a preparation method and electrochemical energy storage application of nitroxide free radical molecules with double redox active centers and analogues of the nitroxide free radical molecules, and belongs to the technical field of nitroxide free radical molecules. Through structural design of molecular bridging substituent groups, groups with multiple bridging points, such as quaternary ammonium groups and acylamino groups, are introduced to the fourth site of a piperidine ring, and the connection mode of the groups is modulated, such as linear or branched, so that controllable coupling of two redox active center units is realized. Researches show that the types, the number and the connection mode of the bridging groups have important influences on the oxidation-reduction potential, the electrochemical kinetics and the cycling stability of target molecules. The invention further discloses a charge-discharge mechanism and a degradation path of double-electron nitroxide free radical electrolyte molecules, and provides a theoretical basis and a practical basis for stable implementation of a double-electron transfer process. The research provides a brand new design thought and technical support for constructing organic flow battery electrolyte molecules with high energy density and long service life, and has a wide application prospect.

The invention discloses a non-planar pi-conjugated naphthoquinone derivative with an asymmetric structure, a preparation method of the non-planar pi-conjugated naphthoquinone derivative and application of the non-planar pi-conjugated naphthoquinone derivative in an aqueous flow battery, and relates to the technical field of electrochemical energy storage. Methyl 4-aminobenzoate is added into hydrochloric acid, then the mixture and sodium nitrite are dissolved in water to be mixed to obtain a diazonium salt solution, and 2-hydroxy-1, 2, 4-triazole is added into the diazonium salt solution to be mixed to obtain a diazonium salt solution; 2, 4-naphthoquinone is dissolved in a KOH solution and mixed with a diazonium salt solution, after hydrochloric acid acidification, acetic acid recrystallization purification is conducted, and BANQ is obtained; the capacity fading rate of the modified naphthoquinone derivative BANQ is as low as 0.00018% per circle, the modified naphthoquinone derivative BANQ shows excellent cycling stability and redox reversibility, the BANQ molecule has an asymmetric non-planar pi conjugation characteristic, and the sensitivity of a redox core to nucleophilic / electrophilic attack is greatly reduced, so that the cycling stability is improved, and the service life is prolonged. And a new direction and possibility are provided for constructing green sustainable large-scale organic redox active molecules for energy storage through artificial modification of natural products.

Crosslinked polymers and related compositions and related compositions, electrochemical cells, batteries, methods and systems are described. The crosslinked polymers have at least one redox active monomeric moiety having a redox potential of 0.5 V to 3.0 V with reference to Li / Li+ electrode potential under standard conditions or −2.54 V to −0.04 V vs. SHE and has a carbocyclic structure and at least one carbonyl group or a carboxyl group on the carbocyclic structure. The crosslinked polymers also include at least one comonomeric moiety with at least one of the at least one redox active monomeric moiety and / or the at least one comonomeric moiety has a denticity of three to six corresponding to a three to six connected network polymer, and provide stable, high capacity organic electrode materials.

The invention belongs to the field of synthesis of electrode materials, and particularly relates to a one-dimensional chain polymer with multiple active sites as well as a preparation method and application of the one-dimensional chain polymer. The polymer is prepared by carrying out dehydration condensation reaction on 1, 8, 4, 5-naphthalene tetracarboxylic anhydride and 2-nitro-1, 4-phenylenediamine in an inert atmosphere, and after the reaction is finished, washing with deionized water and carrying out suction filtration to obtain a target product. The molecular structure of the material simultaneously contains multiple oxidation-reduction active centers such as carbonyl and nitryl, so that efficient Zn / collaborative storage can be realized. When being used as a positive electrode of a zinc ion battery, the composite material shows high discharge capacity and long cycle stability, and an assembled flexible battery also has high volume energy density, excellent repeated bending resistance and chemical self-charging capacity in air, and has wide application potential in the field of wearable electronic equipment. The synthesis process is simple, raw materials are easy to obtain, reproducibility is good, and the method is suitable for large-scale production.

The present invention relates to the electrochemical detection of an analyte by capacitance spectroscopy using a redox active polymer-coated electrode such as a polyaniline-coated electrode.

The invention provides a benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative and a preparation method and application thereof.The benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative is of an asymmetric multi-carbonyl quinone phenazine structure, contains a plurality of oxidation-reduction active sites and can show excellent oxidation-reduction performance, molecules of the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative are of a conjugated structure, hydrogen bonds exist between the molecules, and the structure of the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative can be used for preparing the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative. And the material is difficult to dissolve in an electrolyte, and has stable electrochemical performance in an ion battery. The preparation method of the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative comprises the following steps: carrying out condensation reaction on a 2, 3-diaminonaphthalene-1, 4-diketone derivative and 2, 3, 5, 6-tetrahydroxy-1, 4-benzoquinone to obtain an intermediate; and then oxidizing the intermediate to obtain the benzo [b] phenazine-1, 2, 3, 4, 6, 11-hexanone derivative disclosed by the invention.

Disclosed is an electrode precursor composition suitable for preparing a gel electrode, the composition comprising an organic solvent, an alkali metal salt, and two or more polymers including at least an electrically insulating polymer and an electrically conductive polymer, where the electrically conductive polymer is present at a smaller volume fraction than the electrically insulating polymer. The conductive polymer may be present in the electrode precursor composition in an amount of between 1 and 20 vol% based on the total volume of the electrode precursor composition. The conductive polymer may be present in the electrode precursor composition in an amount of up to 8% by volume based on the total volume of the electrode precursor composition. The conductive polymer may be redox active.

A flexible energy storage device with a glycerol-based gel electrolyte is provided. The flexible energy storage device can include a pair of electrodes separated by the gel electrolyte. The electrolytes can be in gel form, bendable and stretchable in a device. The gel electrolyte can include glycerol, redox-active molybdenum-containing ions, and a secondary ionic substance. The secondary ionic substance can include a salt. The gel electrolyte can have a density of 1.4 to 1.9 g / cm3 and an ionic conductivity of 2.3×10−4 to 3.2×10−4 Scm−1. The flexible energy storage device may retain greater than 95% of an unbent energy storage capacity when bent at an angle of 10 to 170°.

The invention relates to the field of medicine, and more particularly to biosensor analytical devices and can be used for quantifying the concentration of glucose in blood, plasma and serum. The present device comprises a printed graphite electrode, the surface of which is modified with a hybrid composite material incorporating a biorecognition element in the form of glucose oxidase, wherein the hybrid composite material is a redox-active polymer based on chitosan covalently bonded to a mediator in the form of Nile blue. The technical result is that of broadening the range of detectable glucose concentrations to 0.006-1.0 мМ.