836results about "Double layer capacitors" patented technology

An electrode including a substrate, a binding compound, and a composite. The composite includes jute-activated carbon and a nickel-cobalt-layered double hydroxide (NiCoLDH). Particles of the NiCoLDH are in the form of nanoflowers with an average size of 5-15 μm. The nanoflowers comprise nanosheets with an average thickness of 5-20 nm. The particles of the jute-activated carbon are in the form of interconnected nanosheets, which form a porous carbon framework. The porous carbon framework connects the nanoflowers, thereby forming an interconnected structure in the composite. A mixture of the composite and the binding compound is coated on the surface of the substrate. The electrode can be included in supercapacitors and power banks.

An aerosol provision device or a vapor provision device including an aerosol generator or vapor generator; a driving circuit connected to the aerosol generator or vapor generator, wherein the driving circuit is configured to employ either pulse width modulation or amplitude modulation, to supply power to the aerosol generator or vapor generator; and a power source connected to the driving circuit, wherein the power source includes a hybrid ion capacitor.

[Problem] To provide a method and an apparatus for manufacturing an electrode for an energy storage device whereby a more compact electrode coating apparatus, an improvement in electrode production speed, and a reduction in running costs can be achieved. [Solution] Provided is a method for manufacturing an electrode for an energy storage device, the method comprising: a step A for applying a slurry to a rolled current collector conveyed in one direction at a prescribed speed; a step B for heating the applied slurry to a temperature not below 30°C and not above the boiling point of a dispersant in the slurry; and a step C for irradiating the slurry applied to the current collector with laser light of a wavelength equal to or greater than 435 nm and less than 550 nm, or of a wavelength equal to or greater than 890 nm and less than 1100 nm, from a laser irradiation unit, wherein the slurry contains 0.1% by mass or more of carbon relative to the solid content of the slurry.

A glass fiber-based structural composite offers an alternative or supplement to carbon fibers in areas such as battery storage. Through electroless deposition of conductive materials like copper and nickel, the glass fiber surface is made conducting and functions as a good current collector. By using anode and cathode materials like manganese (II, III) oxide and Zinc, cathode and anode mats on the copper- and nickel-coated glass fibers are created via hydrothermal and electro-deposition methods. In one example application, the anode and cathode mats are in an alternate square patterned arrangement using copper and nickel-coated glass fiber as a current collector. The device, with a capacity of >300 mAh / g at 0.1 A / g is assembled using an alternate system of epoxy and electrolyte. Uncoated pristine glass fiber ladened and patterned with electrolyte are used as a separator. Uncoated pristine glass fiber ladened with epoxy can be used as an insulator between two devices.

A nanocomposite electrode including a substrate, a binding compound, a conductive additive, and NiO / Fe2VO4 nanoparticles. The NiO / Fe2VO4 nanoparticles have a substantially spherical shape. A mixture of the binding compound, the conductive additive and the NiO / Fe2VO4 nanoparticles, is at least partially coated on a first surface of the substrate. A method of making the NiO / Fe2VO4 nanoparticles is described.

When potassium hydroxide (KOH) or other activating agents are used to activate carbon, the hydrochloric acid used to remove it may damage the stainless steel equipment used in the process. Herein, water and citric acid are used to wash the carbon after its activation to reduce damage to the equipment. Prior to activation, a slurry of coal, petroleum coke or other carbonaceous material mixed with water and KOH is dried in layers. During drying, the KOH repeatedly precipitates as a crust on the layers and is repeatedly blended back into the mixture. Activation temperature and duration may be selected to control the pore size distribution in the activated carbon.

The present disclosure relates to a current separation method and the like of a nonaqueous lithium power storage element. In the current separation method, the nonaqueous lithium power storage element includes a cell including: a positive electrode precursor that includes a positive electrode active material layer containing lithium carbonate and activated carbon; a negative electrode that includes a negative electrode active material layer containing a negative electrode active material capable of occluding and releasing lithium; a separator arranged between the positive electrode precursor and the negative electrode; and an electrolyte solution. The current separation method includes the step of calculating a capacitor current IC and an electrode reaction current Id of the cell based on voltage and current of the cell that are measured during doping of the cell.

The utility model discloses a stretchable fibrous super capacitor based on a coaxial structure. Comprising a porous fiber electrode, a gel electrolyte and a carbon fiber membrane, the gel electrolyte and the carbon fiber membrane sequentially wrap the electrode, the porous fiber electrode and the carbon fiber membrane are connected with an external circuit through wires and packaged through a stretchable thin film, the length of the porous fiber electrode is equal to the width of the carbon fiber membrane, and the porous fiber electrode has excellent stretchability. The reticular structure carbon fiber membrane has a good microstructure and mechanical properties, gel electrolyte is loaded on the surfaces of the porous fiber electrode and the carbon fiber membrane, and the porous fiber electrode coated with the gel electrolyte is coated with the carbon fiber membrane to prepare the fibrous supercapacitor with a coaxial structure. The fibrous supercapacitor shows high capacity and has high stability to tensile deformation.

The invention provides a preparation method and application of a polyacrylamide / carboxylated chitosan / ionic liquid (PAM / CCS / ionic liquid) hydrogel composite material, and belongs to the technical field of hydrogel materials. Dispersion liquid of ionic liquid, carboxylated chitosan, acrylamide and zinc salt is subjected to polymerization reaction under the condition that an initiator and a cross-linking agent are added, and then the PAM / CCS / ionic liquid hydrogel composite material is prepared in situ. The preparation method provided by the invention is simple and efficient, and the obtained PAM / CCS / ionic liquid hydrogel composite material has high ionic conductivity, excellent mechanical properties and wider applicable temperature range. When the PAM / CCS / ionic liquid hydrogel composite material prepared by the method provided by the invention is used as a gel electrolyte of a zinc storage device, excellent electrochemical performance is shown.

The present invention generally relates to a process for synthesizing neodymium-based metal-organic frameworks (Nd-PTA-MOF), comprising: dissolving 166.13 mg of neodymium nitrate hexa-hydrate in 2 ml of distilled water to form a first solution; dissolving 80 mg of pyridine-2,4,6-tri-carboxylic acid (PTA) in 5 ml of distilled water to form a second solution; mixing the first solution and the second solution in a round bottom flask with magnetic stirring while heating; adding two drops of liquid ammonia to the mixture; refluxing the mixture for 2 hours at a temperature in the range of 120-150° C.; allowing the mixture to crystallize over a period of seven days to form purple-colored Nd-PTA-MOF crystals; washing the formed Nd-PTA-MOF crystals with distilled water and acetone; and fabricating an electrode for developing a hybrid supercapacitor.

An electrochemical device is provided capable of maintaining good electrical connection and providing good sealability. An electrochemical device 1 includes: a case 10 including a recessed container 11 having a bottom 111 and a side wall 112, and a cap 12 that covers the opening of the recessed container 11; a power generation element 20 having a laminate with an electrode layer 21, an electrode layer 22 and a solid electrolyte layer 23 laminated together and housed in the interior space of the case 11 such that the bottom 111 and electrode layer 21 face each other; and a conductive plate 30 positioned adjacent to the opening of the recessed container 11 and between the electrode layer 22 and cap 12. The recessed container 11 includes a plurality of supports 115 on the inner peripheral surface of the side wall 112. The conductive plate 30 includes a plurality of supported portions 31 located on its edges and corresponding in position to the supports 115. With each supported portion 31 supported by its associated support 115, the power generation element 20 is pushed by a spring piece 33 of the conductive plate 30 toward the bottom 111 of the recessed container 11.

The invention discloses an intelligent slope protection system based on a solid waste electricity storage module and a manufacturing method of the intelligent slope protection system, and belongs to the technical field of ecological slope protection, the intelligent slope protection system comprises an intelligent system, a protective layer, an electricity storage layer, an enhancement layer and a waterproof layer, the electricity storage layer comprises a basalt fiber woven fabric interlayer, an electricity storage unit and a circuit, and the electricity storage unit is arranged according to the site. The intelligent system comprises a power supply assembly, an integration module and a wireless communication unit, the integration module and the wireless communication unit are arranged in a circuit layer formed by a circuit, the power supply assembly is connected with the electricity storage layer through the integration module, and the wireless communication unit is connected with the cloud platform. The data acquisition module is used for uploading data of voltage, temperature, humidity, strain and state of charge in real time; the solid waste electricity storage slope protection blanket is integrated and matched with an intelligent system, the three-in-one function integration of protection, electricity storage and ecology is achieved, and then slope self-energy-supply monitoring and protection are achieved.

To provide a negative electrode for a non-aqueous electrolyte storage element that can achieve both a low internal resistance (DC resistance) and a high capacity retention rate after charge / discharge cycles for the non-aqueous electrolyte storage element, and a non-aqueous electrolyte storage element that achieves both a low internal resistance (DC resistance) and a high capacity retention rate after charge / discharge cycles.SOLUTION: A negative electrode for a non-aqueous electrolyte storage element according to an embodiment of the present invention includes a negative electrode active material layer containing a carbon-based active material, a cellulose derivative, and a layered silicate, and the content of the cellulose derivative in the negative electrode active material layer is less than 0.8 mass%.SELECTED DRAWING: Figure 1

To enhance charge and discharge properties of a porous silicon material.SOLUTION: A porous silicon material disclosed herein comprises Si, Al, and a transition metal element M, has a specific surface area of 30 cm2 / g or less according to nitrogen adsorption, is in particulate form, and has a carbon coating layer on the surface.SELECTED DRAWING: Figure 1

The invention provides a method for eliminating residual alkali on the surface of a positive active material and generating a functional film-forming pre-metallization agent in situ and application thereof, and the method comprises the following steps: dissolving halogenated carboxylic acid in an organic solvent to obtain a mixed solution; mixing a positive electrode active material with the mixed solution, and reacting to obtain a positive electrode active material with a pre-metallization agent attached to the surface; wherein the pre-metallization agent is halogenated carboxylic acid metal salt, and the chemical general formula of the pre-metallization agent is Xm-R-(COOM) n; the chemical general formula of the active substance is LiNi < y > Co < z > Mn Q O < 2 > or M 'Li < x > Ni < y > Co < z > Mn Q O < 2 >; through treatment by the method, residual alkali on the surface of the positive electrode active material can be eliminated, and meanwhile, a pre-metallization agent is generated in situ on the surfaces of particles; the pre-metallization agent can be used as an alkali metal supplementing agent to improve the energy density of the electrochemical energy storage device, and MX generated by reaction with the electrolyte can be functionally formed into a film, so that the cycling stability of the electrochemical energy storage device is improved.

The present invention provides a technology related to an adhesive having excellent workability while maintaining adhesiveness. An adhesive composition for an electrode contains: a polyurethane resin aqueous dispersion obtained by dispersing a polyurethane resin in water, carbon nanotubes, and a surfactant, wherein the surfactant contains at least one selected from the group consisting of a nonionic surfactant, a silicone surfactant, and a fluorosurfactant, and the content of the surfactant is 0.1% by mass or more and 20% by mass or less based on the total amount of the polyurethane resin, the carbon nanotubes, and the surfactant.

In order to overcome the problem that the electrochemical performance of the existing supercapacitor is seriously deteriorated at low temperature, the application provides a supercapacitor, comprising a positive electrode, a negative electrode and an organic electrolyte solution, wherein the organic electrolyte solution comprises an organic electrolyte, a proton inert solvent and an additive, and the additive comprises a compound represented by structural formula 1:wherein R1-R6 are each independently selected from a hydrocarbon group with 1-5 carbon atoms, a siloxane group substituted by a hydrocarbon group with 1-3 carbon atoms, an unsubstituted siloxane group, or hydrogen;the positive electrode and negative electrode are both porous carbon materials, and the porous carbon material and the compound represented by structural formula 1 meet the following condition:0.1≤BET*Vt*Mt1700≤7.5.The supercapacitor provided by the application has lower ESR (equivalent series resistance) and better high and low temperature performances.

A logging system and method for operating a logging system are typically used in a wellbore. The logging system may include a logging instrument including a rechargeable energy storage and logging electronics, and a cable configured to trickle charge the rechargeable energy storage. The rechargeable energy storage may include an ultracapacitor. The rechargeable energy storage may be trickle charged through the cable from a remote power source.

The invention relates to the technical field of energy storage materials, and particularly discloses a modified starch-based hard carbon material as well as a preparation method and application thereof. The preparation method of the modified starch-based hard carbon material comprises the following steps: S1, mixing starch and a cross-linking agent according to a certain proportion, dispersing the mixture in deionized water, and then freeze-drying to obtain precursor powder; s2, performing low-temperature pyrolysis on the obtained precursor powder in an argon environment, and pre-carbonizing at a proper temperature to obtain a pre-carbonized sample; and S3, dispersing the obtained pre-carbonized sample and a reinforcing agent in a solvent, uniformly mixing, carbonizing at high temperature, washing with water, and drying to obtain the modified starch-based hard carbon material. The hard carbon material with relatively large specific surface area, active sites and proper interlayer spacing is obtained by crosslinking at low temperature and then crosslinking and carbonizing at high temperature. And when being used as a negative electrode material, the biomass hard carbon material is far superior to a commercial hard carbon material in specific capacity, energy density, discharge current and the like, and a wider prospect is provided for application of biomass hard carbon.

The invention discloses a high-energy sodium ion hybrid capacitor, which is characterized in that an active material of a positive electrode is a sodium ion battery type positive electrode material, an active material of a negative electrode is a carbon material with a high specific surface area, and an electrolyte is an organic ether electrolyte containing sodium ions; and the mass ratio of the active material of the positive electrode to the active material of the negative electrode is (1: 1)-(2.5: 1). The working voltage of the high-energy sodium ion hybrid capacitor is up to 4.1 V, the high-energy sodium ion hybrid capacitor has high energy density, high power density and tens of thousands of cycle stability, pre-sodium treatment is not needed in device assembly, and large-scale preparation is easy.

A nonaqueous electrolyte power storage element according to one aspect of the present invention is provided with a positive electrode having a lithium-transition metal composite oxide comprising manganese, and a negative electrode comprising graphite, wherein the ratio accounted for by manganese in the metal elements other than lithium in the lithium-transition metal composite oxide is 20 mol% or less, and the state of charge of the graphite in a charged condition is less than 0.54.

To provide a power storage element in which generation of a gap between electrodes is suppressed.SOLUTION: A power storage element comprises a wound electrode body 2 having a flat shape and a winding core 6 disposed in a central part of the wound electrode body. The winding core has a flat shape formed by winding a belt-like sheet member and including two folding positions 7A and 7B. The winding core 6 includes a cylindrical part 8 and inner peripheral margin parts 9A and 9B which are disposed inside of the cylindrical part and in which only one end is fixed to the cylindrical part. A length of the inner peripheral margin parts is shorter than a distance from fixing positions 10A and 10B with the cylindrical part 8 to the folding position at a farther side with respect to the fixing positions.SELECTED DRAWING: Figure 2

The application belongs to the field of supercapacitors, and more particularly relates to a high-capacity hybrid supercapacitor with uniform heat distribution for special vehicles. The structure of the hybrid supercapacitor comprises a positive electrode sheet, a negative electrode sheet, a positive electrode tab, a negative electrode tab, a diaphragm and a container shell. The supercapacitor provided in the application is designed to be large in size, not only meeting the high energy requirement of the special vehicle, but also effectively solving the connection problem of the small-size hybrid supercapacitor, and meeting the high power and rapid charging requirement which cannot be met by the lithium ion battery.

An energy storage cell (1) for storing electrical energy, the cell (1) comprises a negative electrode (22) and a positive electrode (32) that are immersed in an organic anhydrous electrolyte (4), wherein the negative electrode (22) includes a negative active material composition that has Nb2O5 particles and microporous carbon (MC) particles; wherein the positive electrode (32) includes a positive active material composition that for the most part has LiMn0.6Fe0.4PO4 (LMFP) particles.

An aerosol provision device for providing an aerosol during a puff on the aerosol provision device is disclosed. The aerosol provision device comprises at least one power source comprising at least one supercapacitor configured to supply electrical power to at least one aerosol generator for generating the aerosol from aerosol- generating material. The at least one supercapacitor is a lithium-ion capacitor, LIC, comprising an anode and a cathode, wherein said anode and / or said cathode comprises one or more dopants.

The invention belongs to the technical field of battery capacitors, and particularly relates to a hybrid battery capacitor and a preparation method and application thereof. The hybrid battery capacitor comprises a shell, a positive pole piece, a diaphragm, a negative pole piece and electrolyte, an active material of the positive pole piece is a ternary material and / or a composite positive pole material of lithium iron phosphate and activated carbon, and the positive pole piece is prepared by coating a layer of the composite positive pole material on a positive current collector and then coating a layer of the activated carbon to form a gradient coating structure; the active material of the negative pole piece is a composite negative pole material of graphite, graphene and activated carbon; the battery cell is formed by assembling a negative pole piece, a diaphragm and a positive pole piece according to a sequence of negative pole-diaphragm-positive pole-diaphragm-negative pole in a lamination or winding manner to form a structure with N layers of positive poles and N + 1 layers of negative poles, the battery cell is packaged in the shell after being subjected to pole lug spot welding, a liquid injection port is reserved, and the battery cell is sealed after being subjected to vacuum liquid injection. And obtaining the hybrid battery capacitor.

The present invention discloses a method for preparing a positive electrode active material for a high-power and high-specific energy battery-type capacitor, belonging to the technical field of battery-type capacitors. The positive electrode active material is firstly obtained by oxidation-reduction and hydrothermal reduction methods to obtain a heteroatom-doped graphene compound, and then a heteroatom-doped graphene / activated carbon / lithium cobalt oxide composite positive electrode material is prepared by high-speed dispersion and mechanical mixing methods. The positive electrode active material for a battery-type capacitor of the present invention has the advantages of a large electrolyte storage capacity and low internal resistance of the prepared electrode sheet, thereby ensuring that the battery-type capacitor has both high specific energy and specific power, and has excellent cycle stability of 100% DOD at high potential.

The application provides a biomass-based composite electrode material, an electrode sheet and a hybrid supercapacitor, and belongs to the technical field of electrochemical energy storage. 3 The biomass-based composite electrode material comprises: a biomass-derived porous carbon matrix, pores with multiple pore sizes, the volume of the pores is 0.7-1.7 cm 2 / g; and nickel-cobalt layered double hydroxide nanosheets vertically anchored on the surface of the biomass-derived porous carbon matrix; the specific surface area of the composite electrode material is 900-1400 m 2 / g. The biomass-based composite electrode material of the application significantly improves the ion adsorption and charge storage capacity. In addition, the electrode material is applied in a capacitor, which effectively improves the energy density, electrode conductivity and cycle stability of the supercapacitor.

The invention relates to the technical field of capacitors, in particular to a supercapacitor core package, a preparation method thereof and a supercapacitor. The preparation method of the super capacitor core package comprises the following steps: preparing a moisture absorption electrode with the water content of 20%-30%; freezing the moisture absorption electrode to obtain a micro-ice crystal electrode; and drying the micro-ice crystal electrode, winding the micro-ice crystal electrode and a diaphragm to form a super capacitor core cladding intermediate, and fixing the super capacitor core cladding intermediate through an elastic piece to obtain the super capacitor core cladding. According to the super capacitor core package, the tail diaphragm can be prevented from being broken and damaged, the assembled super capacitor is not prone to short-circuit failure, and the self-discharge performance, the high-temperature durability and the cycling stability of the super capacitor core package are superior to those of a super capacitor assembled according to an existing process.