601results about "Double layer capacitors" patented technology

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 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 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 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.

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 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.

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.

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.

To provide a separator for a power storage device which has high strength and suppresses clogging due to long-term use.SOLUTION: In a separator for a power storage device including a microporous layer (X) whose main component is polyolefin (A), the melt flow rate (MFR) of the microporous layer (X) at a load of 2.16 kg and a temperature of 230°C is 0.90 g / 10 min or less, and in the MD-TD surface observation or the ND-MD cross-sectional observation of the microporous layer (X) by a scanning electron microscope (SEM), the average long pore diameter of the pore existing in the microporous layer (X) is 100 nm or more.SELECTED DRAWING: None

Provided is a binder composition for an electrical storage device, which is an aqueous binder, can produce an electrical storage device electrode excellent in adhesiveness and flexibility, and can improve a cycle characteristic by reducing an increase in internal resistance of the electrical storage device. A binder composition for an electrical storage device according to the present invention includes: a polymer (A); and a liquid medium (B). When a total of repeating units in the polymer (A) is defined as 100 mass%, the polymer (A) contains 15 mass% to 64 mass% of a repeating unit (a1) derived from an unsaturated carboxylic acid ester having an aliphatic hydrocarbon group (except an unsaturated carboxylic acid ester having an alicyclic hydrocarbon group), and 35 mass% to 84 mass% of a repeating unit (a2) derived from an aromatic vinyl compound, and tanδ (loss elastic modulus / storage elastic modulus) in dynamic viscoelasticity of the polymer (A) expresses only one peak top in a range of from -50°C to 0°C and one peak top in a range of from 50°C to 150°C.

Provided is a binder composition for an electrical storage device, which is an aqueous binder, can produce an electrical storage device electrode excellent in adhesiveness and flexibility, and can improve a cycle characteristic by reducing an increase in internal resistance of the electrical storage device. A binder composition for an electrical storage device according to the present invention includes: a polymer (A); and a liquid medium (B). When a total of repeating units in the polymer (A) is defined as 100 mass%, the polymer (A) contains 15 mass% to 64 mass% of a repeating unit (a1) derived from an unsaturated carboxylic acid ester having an aliphatic hydrocarbon group (except an unsaturated carboxylic acid ester having an alicyclic hydrocarbon group), and 35 mass% to 84 mass% of a repeating unit (a2) derived from an aromatic vinyl compound, and tanδ (loss elastic modulus / storage elastic modulus) in dynamic viscoelasticity of the polymer (A) expresses only one peak top in a range of from -50°C to 0°C and one peak top in a range of from 50°C to 150°C.

The invention provides a manufacturing process of a micro supercapacitor based on femtosecond laser 4D printing, which relates to the technical field of energy storage device manufacturing, and comprises the following steps: providing a substrate which is glass, a silicon wafer, a polymer film or a metal foil, and pre-treating the surface of the substrate to obtain a pre-treated substrate; and the pretreated substrate is coated with carbon quantum dots and shape memory epoxy resin to form a composite material layer. According to the manufacturing process of the micro supercapacitor based on femtosecond laser 4D printing, a femtosecond laser technology is combined with optical flow control printing and infrared laser irradiation, a porous structure can be accurately constructed in a composite material layer, a deformation state is solidified and fixed through infrared laser, and a novel manufacturing method of the micro supercapacitor is provided; a high-precision miniature capacitor structure is realized, and the energy storage capability and the cycling stability of the capacitor are effectively improved.

The invention provides an electrode material, a preparation method thereof and a sodium ion hybrid capacitor. The preparation method of the electrode material comprises the following steps that raw materials including a sodium source, an iron source and a phosphorus source are provided, and the molar ratio of sodium atoms in the sodium source to iron atoms in the iron source to phosphorus atoms in the phosphorus source is (3.8-5): (2.7-3.1): (3.8-5); mixing the raw materials to prepare a pretreated material; mixing the pretreated material and a pore-forming agent, and carrying out heat treatment to prepare ferric sodium pyrophosphate particles; the particle size D50 of the ferric sodium phosphate pyrophosphate particles is 1-9 [mu] m, and the specific surface area of the ferric sodium phosphate pyrophosphate particles is 4-15 m < 2 > / g. According to the invention, the specific pore-forming agent is utilized to prepare the ferric sodium pyrophosphate particles with the porous structure, and the particle size and the specific surface area are optimized to be matched with each other, so that contact points are increased, the contact area is increased, good wettability with electrolyte is realized, and the ohmic resistance of the electrode is reduced.

To relieve stress applied to a joint between a bus bar and a terminal.SOLUTION: A bus bar 1 disclosed herein includes a first bonding region 10 bonded to a terminal portion 144 of a first power storage device 100A, a second bonding region 20 bonded to a terminal portion 144 of a second power storage device 100B different from the first power storage device 100A, and a bridging region 30 connecting the first bonding region 10 and the second bonding region 20. At least one of the first bonding region 10 and the second bonding region 20 is provided with buffer portions 12, 22 that absorb stress S caused by fluctuations in the gap G between the first bonding region 10 and the second bonding region 20. The bus bar 1 configured in this manner can reduce stress on bonding portions W1, W2 between the bus bar 1 and the terminal portion 144.SELECTED DRAWING: Figure 2

To provide a negative electrode active material for a sodium ion secondary battery that exhibits stable battery characteristics when charging and discharging are repeatedly performed.SOLUTION: A negative electrode active material for a sodium ion secondary battery contains an amorphous phase containing SiO2, and an Fe-Sn based alloy.SELECTED DRAWING: None

To provide a power storage device and the like that can maintain good sealing between a resin member that fixes a terminal member to a case member and the case member and the terminal member.SOLUTION: A power storage device 1 includes a case member 21 having an insertion hole 21h, a terminal member 40, and a resin member 60 that fixes the terminal member 40 to the case member 21. The terminal member 40 includes a terminal top plate portion 43 and a terminal extension portion 53. The terminal member 40 and the resin member 60 are airtightly sealed only at a top plate roughened portion 47 that is formed in a band-like ring shape on the top plate back surface 45 of the terminal top plate portion 43 and has a roughened surface. The case member 21 and the resin member 60 are airtightly sealed only at a case roughened portion 27 that is formed in a band-like ring shape on the case inner side surface 24 of the case member 21 and has a roughened surface.SELECTED DRAWING: Figure 3