122results about "Reduction-oxidation hybrid capacitors" patented technology

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

This synthetic stone can be used as electrical energy storage which acts like a supercapacitor and invention also discloses a preparation method thereof. According to this invention, geopolymer (11) and cement (12) are being taken as materials for an electrolyte. A supercapacitor of the present invention comprises a geopolymer (11) and cement matrix (1) and a positive and negative steel electrode (2, 3), whereby the steel electrodes (2, 3) are arranged in the matrix (1), and the matrix (1) is prepared from conductive mortar. The conductive mortar (1) comprises fly ash, cement (12), gravel and sand, alkali activator (KOH and SiO2) (13), and some additives (14) of synthetic stone compounds such as poly carboxylate ether, retarder, lignosulfonate, ethylene-vinyl acetate, hydroxypropyl methyl cellulose, pigment and carbon black. This supercapacitor synthetic stone is simple in structure and is based on a particular formulation.

The artificial stone can be used as an electric energy storage device which is similar to a super capacitor, and the preparation method of the artificial stone is disclosed. According to the invention, geopolymers and cement are used as materials for electrolytes. The supercapacitor of the invention comprises a geopolymer and cement matrix (1) and positive and negative steel electrodes (2, 3), whereby the steel electrodes (2, 3) are arranged in the matrix, which is prepared from an electrically conductive mortar. Conductive mortars include fly ash, cement, gravel and sand, alkaline activators (KOH and SiO2), and additives to some artificial stone compounds, such as polycarboxylic acid ethers, retarders, lignosulphonate, ethylene-vinyl acetate, hydroxypropyl methyl cellulose, pigments, MXene and carbon black. The super capacitor artificial stone is simple in structure and is based on a specific formula.

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

A secondary cell is provided. The secondary cell comprises a solid electrolyte to conduct oxygen ions, a positive electrode configured to be in contact with the solid electrolyte, and a negative electrode configured to be in contact with the solid electrolyte. The positive and the negative electrode comprise a mixed ionic and electronic structure for conducting oxygen ions and electrons. The mixed ionic and electronic structure comprises an ABO3 structure, wherein the A site corresponds to a first chemical element with a first covalent radius, wherein the B site corresponds to a second chemical element with a second covalent radius; and / or a CeMO2 structure, wherein the Ce is Cerium and M is a metal.

Ternary composite material, electrode, supercapacitor, and related methods. A ternary composite material includes a scaffold formed of carbon nanotubes (CNT), a first layer of zeolitic imidazolate 8 (ZIF-8) crystals formed on the scaffold of the CNT, and a second layer of molybdenum disulfide (MoS2) flakes formed on the first layer of the ZIF-8 crystals. An electrode can be formed with the ternary composite. A supercapacitor may include one or more electrodes that are at least partly formed of the ternary composite material. Methods of producing the ternary composite material and the electrodes are also disclosed.

A carbon foam formed of carbon fibers, where, at 90 % or more of any 20 locations, the carbon fibers have a fiber diameter that is within ± 20 % of an average fiber diameter.

A solid state energy harvester includes an anode including a first transition metal sub-oxide; a cathode comprising a second transition metal sub-oxide; and a separator interposed between the anode and the cathode; wherein at least one of the anode, the cathode or the diaphragm contains water, and wherein the collector generates electrical power when electrically connected to an external load.

The invention relates to an electrochemical biofilm sensor comprising a first, a second and a third electrode, wherein the first electrode is a working electrode on whose surface the biofilm whose growth is to be measured develops, the second electrode is a reference electrode having the function of providing a stable reference potential for the polarization of the working electrode, the third electrode is a counter-electrode that can be connected to the first electrode through an electric circuit so as to allow the circulation of current from the first electrode to the third electrode or vice versa, a function of the alteration induced by the biofilm on the kinetics of the evolving reactions on the surface of the first electrode. The first electrode and / or the second electrode and / or the third electrode have the characteristic of being coated with a coating based on mixed oxides of different noble metals, such as iridium, ruthenium, platinum, rhodium, tantalum or niobium, and wherein one or more electrodes are made of titanium or tantalum, and wherein the coating has a thickness of between 0. 1 and 50 microns, preferably 2.5 microns ± 10%.

The invention discloses a MnO2-KOH synergistic modified biomass-based porous carbon electrode material as well as a preparation method and application thereof. The preparation method of the electrode material comprises the following steps: providing biomass powder; biomass powder and manganese dioxide are mixed and ground uniformly, and a mixed material is obtained; carrying out segmented calcination on the mixed material in an inert atmosphere, cooling, washing, and drying to obtain a carbonized product; mixing the carbonized product with potassium hydroxide, and dissolving in deionized water to obtain a mixed solution; heating the mixed solution in a water bath, and drying after the reaction is finished to obtain a dried mixture; calcining the dry mixture, and cooling to obtain an activated product; the activated product is subjected to acid pickling, ultrasonic treatment, washing, drying and sieving, and the electrode material is obtained. The electrode material has a high specific surface area, a reasonable micropore-mesopore hierarchical structure and excellent specific capacitance and cycling stability, the electrochemical performance of a supercapacitor can be remarkably improved, and the requirement for medium and low power density energy storage is met.

A porous interconnected corrugated carbon-based network (ICCN) composite and methods for making the same are disclosed. The porous ICCN composite is made up of a plurality of carbon layers that are interconnected and expanded apart from one another to form a plurality of pores. Metallic nanoparticles are disposed within the plurality of pores. In one embodiment, a light exposure only based method for producing the porous ICCN composite is disclosed. In another embodiment a light exposure plus an electrodeposition method for producing the porous ICCN composite is disclosed. In yet another exemplary embodiment, a capacitor having a first electrode and a second electrode separated from the first electrode by a dielectric wherein at least one of the first electrode and the second electrode is formed from the porous ICCN composite is disclosed.

A hybrid supercapacitor with color-indicated charge status is presented. The device includes a molecular network that functions as both a battery-type electrode and a charge indicator. Related batteries, electrodes, and devices, their preparation processes, and methods of use are also provided.

The present invention refers to a supercapacitor, to an energy storage or delivery system comprising said supercapacitor, to a method of storing electricity comprising providing said supercapacitor, a method of delivering electricity comprising providing said supercapacitor, and to the use of the supercapacitor to store or deliver electricity.

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°.

Embodiments of the present disclosure describe a hybrid composite material comprising a polymer matrix and elemental sulfur substantially uniformly dispersed in the polymer matrix, wherein the polymer is a branched polymer. Electrochemical devices, which may be fabricated from the hybrid composite material, adsorbents comprising the hybrid composite materials, and methods of using the devices and adsorbents are also provided.

Disclosed is a hybrid electrochemical cell with a first conductor having at least one portion that is both a first capacitor electrode and a first battery electrode. The hybrid electrochemical cell further includes a second conductor having at least one portion that is a second capacitor electrode and at least one other portion that is a second battery electrode. An electrolyte is in contact with both the first conductor and the second conductor. In some embodiments, the hybrid electrochemical cell further includes a separator between the first conductor and the second conductor to prevent physical contact between the first conductor and the second conductor, while facilitating ion transport between the first conductor and the second conductor.

A method of amplifying interfacial capacitance in an electrochemical storage device may comprise applying a voltage to a porous metal electrode of an electrochemical storage device, the electrochemical storage device comprising the porous metal electrode; an electrolyte forming an interface with a surface of the porous metal electrode, the electrolyte comprising an ionic liquid and a redox active metal ion; and a counter electrode in electrical communication with the porous metal electrode. At the voltage applied, the electrochemical storage device exhibits an increased capacitance as compared to the electrochemical storage device at the voltage applied but absent the redox active metal ion. Also provided are the electrochemical storage devices.

The invention belongs to the field of energy storage materials, and discloses a preparation method of a bamboo fiber / nickel-based composite electrode material, which comprises the following steps of: adding a bamboo block or a bamboo bundle into an alkaline solution for hydrothermal reaction, and cleaning and drying the bamboo block or the bamboo bundle after the hydrothermal reaction is finished; adding the bamboo blocks or the bamboo bundles into a strong oxidizing solution for hydrothermal reaction, taking out the bamboo blocks or the bamboo bundles after the reaction is completed, and cleaning and drying the bamboo blocks or the bamboo bundles; nickel salt, C6H12N4, water and polyethylene glycol are prepared into a reaction solution, a dried sample is immersed into the reaction solution for a hydrothermal reaction, after the reaction is finished, the dried sample is taken out, washed, aired and subjected to high-temperature heat treatment, and the bamboo fiber / nickel-based composite electrode material is obtained. According to the preparation method, a series of pretreatment and in-situ growth technologies are carried out on bamboo bundles or bamboo blocks, the nickel / nickel oxide nano material with high pseudocapacitance activity is successfully, uniformly and stably loaded on a carbon fiber skeleton derived from bamboo fibers, and the obtained composite electrode material is of an independent fiber structure; in an electrolyte, the material has good ion transmission and electron conduction efficiency and excellent electrochemical performance and cycling stability.

An electrochemical device includes a counter electrode, a reference electrode, a working electrode, and an electrolyte. The working electrode is a fluorine-doped tin oxide electrode with a graphite-phase carbon nitride calcium metavanadate and calcium silicate (CaV2O6 / CaSiO3 / g-C3N4) nanocomposite, a binder, and a black carbon mixture on a surface of the fluorine-doped tin oxide electrode. The CaV2O6 / CaSiO3 / g-C3N4 nanocomposite includes a graphite-phase carbon nitride (g-C3N4) in an amount of 20 to 40 percent by weight (wt. %), calcium metavanadate (CaV2O6) in an amount of 20 to 40 wt. %, and a calcium silicate (CaSiO3) in an amount of 20 to 40 wt. % based on a total weight of the CaV2O6 / CaSiO3 / g-C3N4 nanocomposite.

The application belongs to the technical field of capacitors, and discloses a nickel-iron Prussian blue supercapacitor electrode material, a preparation method thereof and a supercapacitor, which comprises the following steps: dissolving nickel chloride hexahydrate, iron trichloride hexahydrate and trisodium citrate dihydrate in water to obtain reagent A, dissolving potassium ferricyanide in water to prepare a solution to obtain reagent B; slowly adding reagent B into reagent A under room temperature, stirring, and then placing the mixed solution under room temperature, washing, centrifuging, collecting the precipitate, and vacuum drying to obtain a nickel-iron Prussian blue material PBA; by adjusting the amount of trisodium citrate and the ratio of nickel to iron, the two play a synergistic role to achieve the effect of high specific capacitance (140.25 F·g ‑1 ) and cycle stability (84.35% retention rate after 2000 cycles), and when the two synergistically act, the structural stability and redox activity of the material can be effectively enhanced, and finally the balance between high specific capacitance and excellent cycle stability is achieved.

One aspect of the present invention is a carbon dioxide adsorption battery comprising: a positive electrode; a negative electrode; an electrolyte layer disposed between the positive electrode and the negative electrode; and a flow path connected to the negative electrode. The electrolyte layer includes an electrolytic solution capable of dissolving carbon dioxide, the negative electrode is an electrode capable of transmitting gas, the positive electrode includes a porous electrode, and the specific surface area of the porous electrode is 100-3000 m2 / g in terms of BET specific surface area and greater than the specific surface area of the negative electrode.

The application discloses a transition metal doped cerium oxide-three-dimensional graphene composite material rich in oxygen vacancies and a preparation method. 2‑x The chemical formula of the composite material is TM-CeO 2‑x / 3D Gr, wherein x is in the range of 0.09-0.56, and TM is one of Fe, Co, Ni, Mn or Cr. The transition metal doping can introduce a large number of oxygen vacancies in CeO2 by using the difference in valence states, thereby optimizing the electronic structure of the material, improving the redox activity, and enhancing the conductivity of CeO2. The TM-CeO 2‑x / 3D Gr composite material has significantly improved electrochemical performance. When the composite material is assembled into a flexible supercapacitor and subjected to performance testing, the supercapacitor exhibits excellent electrochemical performance and mechanical properties.

The present invention relates to a structural supercapacitor based on a redox cement-based solid electrolyte and a preparation method thereof. The structural supercapacitor uses rGO / Mn2O3 as a positive electrode, rGO as a negative electrode, and polyacrylamide-cement-Mn(NO3) 2· 4H2O is assembled from a redox solid electrolyte. First, rGO / Mn2O3 electrodes are prepared by a two-step hydrothermal method. Secondly, a redox cement-based solid electrolyte is prepared by a synchronous reaction method. Finally, the electrodes prepared above are assembled with the electrolyte to prepare a structural supercapacitor. Compared with the prior art, the present invention prepares solid electrolytes by a synchronous reaction method, fully utilizes the heat released during the cement hydration process to initiate the polymer monomers, and forms a 3D through-network structure inside the solid electrolyte, which balances the contradiction between its mechanical properties and electrochemical properties to a certain extent. In addition, by adding Mn to the solid electrolyte 2+ The contribution of solid electrolytes to the specific capacitance of structural supercapacitors was realized.

A nanofluidic voltage generator (1) comprises a plurality of nanochannels (2) extending between a first electrolyte reservoir (4) and a second electrolyte reservoir (5) in a channel main direction (6) and being delimited in at least one transverse direction (13) that is transverse to the channel main direction (6) by channel walls. The channel walls comprise at least one kind of charged functional groups at a concentration that is increasing in the channel main direction (6). A width of the nanochannels (2) between the channel walls in the at least one transverse direction (13) is in a ranged from 1 nm to 1,000 nm. An electrolyte (8) filling the first reservoir (4), the second reservoir (5), and the nanochannels (2), the electrolyte (8) includes positively charged cations (10) and negatively charged anions (9). A first electrode (14) is electrically coupled to the electrolyte in the first reservoir (4), and a second electrode (15) is electrically coupled to the electrolyte in the second reservoir (5). A compression device (12) is provided for temporarily subjecting the nanochannels (2) to a compression in the at least one transverse direction (13).

The present disclosure generally relates to electrode slurry compositions, including those comprising an electrode active material; a binder; and a microemulsion comprising an aqueous phase, a water-immiscible phase, and an amphiphile, wherein the electrode active material and binder are incorporated within the microemulsion, which can be used to prepare electrodes, including for the production of electrochemical cells.

A wired power transmission system (10) for an intelligent glass (9), the system comprising: a connector module (20) comprising a power connector (21) connected to a retaining clip (7) configured to fix the smart glass (9), the connector module (20) being configured to transmit power to the smart glass (9); an inverter (70) configured to vary an applied voltage of the power to change the power or voltage of the smart glass (9); a cable module (30) electrically connecting the power connector (21) and the inverter (70) through a power cable (50), the cable being configured that it maintains an electrical connection state by generating a voltage of the power cable (50) through an interval change between the connector module (20) and the inverter (70); and a retaining mounting bracket (40), wherein the retaining mounting bracket (40) comprises: a rotor (41) configured to insert the power connector (21) into a connector groove (41c) formed in a plate body; and a lead frame (45) comprising a frame body (46) connected to a frame channel (41b), which is formed in the plate body and is configured to connect the power connector (21) and connecting the cable end through a terminal (47) provided on the frame body (46).

Embodiments include an electrode material including a plurality of cores fused to a plurality of redox active linkers via Aza units to form a layered two-dimensional (2D) Aza-fused pi-conjugated covalent organic framework (COF). Embodiments also include a negative electrode material including the electrode material, as well as a supercapacitor device and an asymmetric supercapacitor device including the electrode material. Embodiments further include a method of making an electrode material including one or more of the following steps: combining a hexaketocyclohexane compound and an aromatic tetraamine compound in a solution; mixing the solution including the hexaketocyclohexane compound and the aromatic tetraamine compound; and heating the mixed solution to form a 2D Aza-fused pi-conjugated COF.

A redox-active modified metal-organic framework There is provided an electrode comprising a substrate coated with a redox-active modified metal-organic framework (MOF), wherein the redox-active modified MOF is a ferrocene-functionalised MOF. There is also provided an electrosorption unit comprising the electrode and a method of separating at least one target molecule from a fluid source using the electrode.