389results 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.

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.

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 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.

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 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 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.

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.

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

The present invention provides a composition for electrochemical element functional layers, the composition being capable of forming a functional layer for electrochemical elements, the functional layer having excellent wet adhesion, while enabling an electrochemical element to exhibit high output characteristics. A composition for electrochemical element functional layers according to the present invention contains a particulate polymer which has a volume average particle diameter of 0.5 μm to 10 μm and a degree of swelling in an electrolyte solution of 120% or less.

To provide a secondary battery in which a short circuit in a gap between a cathode plate and an anode with a separator interposed therebetween can be prevented and a decrease in impregnation properties of an electrolytic solution into a wound electrode body can be suppressed.SOLUTION: A secondary battery according to an embodiment includes: a wound electrode body in which a cathode plate where a cathode active material layer is formed except for cathode current collector foil exposed portions extending along one long side of a band-shaped cathode current collector foil and an anode plate where an anode active material layer 41 is formed except for anode current collector foil exposed portions extending along one long side of a band-shaped anode current collector foil are wound around via a band-shaped separator; a battery case that houses the wound electrode body and an electrolytic solution; a cathode current collector terminal that is electrically connected to a cathode current collector foil portion where the cathode current collector foil exposed portions are collected; an anode current collector terminal electrically connected to an anode current collector foil portion where the anode current collector foil exposed portions are collected; and insulating layers formed in at least one of a region of the cathode current collector foil exposed portions except for the cathode current collector foil portion and a region of the anode current collector foil exposed portions except for the anode current collector foil portion.SELECTED DRAWING: Figure 1

The present invention relates to a pre-doping agent for a power storage device, the pre-doping agent being mainly composed of a lithium iron oxide represented by formula (1), wherein the intensity ratio (I16.7 / I23.6) of a diffraction peak intensity (I16.7) at a diffraction angle (2θ) of 16.7±0.5° to a diffraction peak intensity (I23.6) at a diffraction angle (2θ) of 23.6±0.5° is less than 40% as measured by X-ray diffraction. Accordingly, a pre-doping agent for a power storage device having a very large irreversible capacity is provided, wherein it is possible to suppress a decrease in the energy density of the power storage device and reduce the manufacturing cost, and electrolyte decomposition can be suppressed because lithium ion pre-doping can be carried out at a lower charging voltage.　(1): Li5FexOy [In formula (1), x satisfies 0.6≤x<1.0, and y satisfies 3.4≤y<4.0.]

A non-aqueous electrolyte solution for a secondary battery, containing a first compound represented by the following Formula (1), a second compound represented by the following Formula (2), a non-aqueous solvent, and an electrolyte.

The invention discloses a cathode steel bar current on-line detection system and method based on thermoelectric self-power supply, and relates to the technical field of aluminum electrolysis smelting, the system comprises: a current acquisition unit arranged at two detection points on the surface of a cathode steel bar and used for acquiring a voltage drop between the two detection points to generate a voltage drop signal; the hot end of the thermoelectric power generation unit is attached to the surface of the cathode steel bar, the cold end is connected with the heat dissipation structure, and the temperature difference between the hot end and the cold end drives carriers to move directionally to generate initial electric energy; the energy management unit is used for storing the initial electric energy and boosting and converting to generate stable power supply voltage; and the signal processing and wireless transmission unit is driven by the stable power supply voltage, performs division operation on the voltage drop signal and the resistance value after temperature compensation to generate a current value, modulates the current value into a wireless signal and sends the wireless signal to a far-end receiving terminal. The waste heat of the electrolytic cell is utilized to generate power, energy self-sufficiency is achieved, data are transmitted in a wireless mode, and the problems of power supply and signal transmission in cathode steel bar current detection are fundamentally solved.

The present invention relates to the technical field of lithium-ion capacitors, and in particular to an electrolyte for a lithium-ion capacitor and a lithium-ion capacitor. The electrolyte for a lithium-ion capacitor comprises an organic solvent, a lithium salt, and additives, wherein the additives include a negative electrode film-forming additive and a water‑removal and acid‑suppression additive. By selecting the negative electrode film-forming additive and the water‑removal and acid‑suppression additive for use in reasonable combination with the organic solvent and the lithium salt, the electrolyte for a lithium-ion capacitor of the present invention enables lithium-ion capacitors to have high energy density performance and a longer cycle life.

A nonaqueous electrolyte energy storage device according to one aspect of the present invention includes: a negative electrode including a negative active material layer; and a nonaqueous electrolyte containing an unsaturated cyclic carbonate and a P-O bond-containing fluorophosphate, in which the negative active material layer has a BET specific surface area of 0.80 m2 / g or more and 1.5 m2 / g or less, and the ratio of the content of the unsaturated cyclic carbonate to the total content of the unsaturated cyclic carbonate and the P-O bond-containing fluorophosphate is 0.60 or more and less than 1.0 on a mole basis.

Metal-organic frameworks, supercapacitor electrodes, and supercapacitors are generally provided. Some metal-organic frameworks described herein may be suitable for use in supercapacitor electrodes, some supercapacitor electrodes described herein may include a metal-organic framework described herein, and some supercapacitors described herein may include a supercapacitor electrode described herein.

The invention belongs to the technical field of fluid control, and discloses a high-speed electric control valve and a control method thereof, and the valve comprises a tubular valve body, an internal diaphragm, a metal explosion wire adhered to the diaphragm, a connecting electrode and a control circuit. The energy storage circuit module is composed of a high-voltage capacitor and a fast thyristor, when a trigger signal is received, the thyristor is conducted to enable the capacitor to instantly discharge to the explosion wire, the metal wire is gasified to generate shock waves to break down the diaphragm, and microsecond-level high-speed conduction is achieved. The diaphragm is preferably a polyimide film with the thickness of 10-100 microns, the explosion wire is a copper / tungsten wire with the diameter of 0.05-0.5 mm, and the explosion wire is matched with a capacitor with the charging voltage of 200-1000 V and the capacitance value of 10-1000 [mu] F. The control method comprises the steps of diaphragm installation, capacitor charging, triggering signal sending, high-voltage discharging and diaphragm breaking conduction, and reliable operation is ensured by dynamically adjusting charging voltage and adopting an optical fiber / wireless triggering mode. The invention has the characteristics of fast response and strong interference resistance, and is suitable for high pressure difference occasions needing to accurately control the on-off of gas.

A method of making a capacitor-assisted hybrid electrode for a lithium-ion electrochemical cell includes admixing a solvent, a cellulose-based dispersant, and a plurality of capacitive particles comprising carbon to form a dispersion. The cellulose-based dispersant forms hydrogen bonds with one or more carbonyl-groups on the capacitive particles comprising carbon. The dispersion is combined with an electroactive material, an electrically conductive material, and a binder to form a slurry. The slurry is applied to a current collector and solidified to form the capacitor-assisted hybrid electrode having a composite hybrid active layer on the current collector. Capacitor-assisted hybrid electrodes formed from such methods are also provided.

To provide an electrode and a capacitor capable of reducing a decrease in capacitance in a high-temperature environment.SOLUTION: In the capacitor 10, the electrode (positive electrode) 11 includes a mixture layer 13 containing activated carbon and a current collector layer 12 attached to the mixture layer. The mixture layer contains metal elements (excluding alkali metals) other than the elements contained in the current collecting layer, and the mass concentrations of the metal elements are 1ppm or more. As an example of the implementation procedure, it was confirmed that a small amount of Zr was contained in the positive electrode by charging and discharging using the supernatant obtained by mixing the electrolytic solution and the powder of the solid electrolytic Li7La3Zr2O12 as the electrolytic solution.SELECTED DRAWING: Figure 1