472results about "Hybrid capacitor separators" patented technology

Provided is an electrical storage device that is compact and can be manufactured easily, while allowing for use of higher voltages.　In an electrical storage device 1, a winding structure 20 comprises: a central electrode body 21 in which a first extending part 21b and a second extending part 21c extending from either side of a central portion 21a are wound around the central portion in the same direction; a first electrode body 22 electrically connected to a first external terminal 6 and extending toward an outer peripheral side from a vicinity of the central portion; a second electrode body 23 electrically connected to a second external terminal 7 and extending toward the outer peripheral side from a vicinity of the central portion; a first separator 24 disposed between the central electrode body and the first electrode body; and a second separator 25 disposed between the central electrode body and the second electrode body.

The invention relates to a fluoropolymer coating composition that can be used, for example, in coating electrodes and / or separators in electrochemical devices. The fluoropolymer coating composition preferably contains multiple fluoropolymer phases. The coated electrodes and / or separators have both excellent wet adhesion, excellent dry adhesion, and low leachables. Each of the fluoropolymer phases contains polymers having at least 10 weight percent, of a common fluoromonomer, making the polymer phases compatible with each other, and allowing for the phases to be distributed fairly homogeneously on a macroscopic level throughout the composition and dried coating formed from the composition.

Provided are an electrolyte powder, a sheet, an electrochemical element, and an electric power storage device which can facilitate quality control. The electrolyte powder has a garnet-type crystalline structure containing Li, Zr, and La, and satisfies b*≥2 in chromatic coordinates of CIE 1976 L*a*b* color space. The electrolyte powder optionally satisfies a*≥0, and the chroma represented by c*={(a*)2+(b*)2}1 / 2 optionally satisfies 2≤c*≤10. The sheet, the electrochemical element, and the electric power storage device each include the electrolyte powder.

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

It could be helpful to provide a laminate for an electrochemical device that can advantageously be used as a device member having excellent blocking resistance and low-temperature adhesiveness. The laminate includes a substrate and a functional layer. The functional layer contains heat-resistant fine particles; adhesive particles containing an adhesive polymer; and a binder. The adhesive polymer contains a polyester polymer having a glass-transition temperature in a range of not lower than 10°C and not higher than 95°C. In plan view of the laminate from a side corresponding to the functional layer, the functional layer includes an adhesion region formed of the adhesive particles and a heat-resistant region formed of the heat-resistant fine particle and the binder. In the laminate, the volume-average particle diameter of the adhesive particles is larger than the average stacking direction height of the heat-resistant region.

The invention relates to an electrochemical cell for a battery of an electric or hybrid motor vehicle, said negative electrode comprising a negative current collector comprising at least one negative foil, said positive electrode comprising a positive current collector comprising at least one positive foil, said electrochemical cell comprising at least one separator, the separator being positioned between the negative foil and the positive foil, said electrochemical cell comprising a plurality of layers of active material soaked in electrolyte, characterized in that said electrochemical cell comprises a first subassembly (100) in which the negative foil and the positive foil each comprise one of the electrolyte layers, the electrolyte layer being in contact with said separator,said electrochemical cell comprising a second sub-assembly (200) in which the negative and positive foils are in contact with the separators, said second sub-assembly (200) forming a capacitor. Figure 1,

To provide a technique which can obtain a power storage device having a wound electrode body with high productivity.SOLUTION: A manufacturing method of a power storage device (for example, battery) of one embodiment disclosed herein includes: winding step S2 of winding a positive electrode 22 and a negative electrode 24 through a separator 26 to manufacture a wound body 20A; and pressing step S3 of press-molding the wound body 20A after the winding step S2 to form flat wound electrode bodies 20a, 20b, 20c. In the winding step S2, the separator which has an adhesive layer 6 partially on at least one surface is used. The adhesive layer 6 includes: a first adhesive area 6A; and a second adhesive area 6B. A thickness T1 of the first adhesive area 6A is 1.5 times or more of a thickness T2 of the second adhesive area 6B. Furthermore, herein, the method further includes formation step S1 before the winding step S2.SELECTED DRAWING: Figure 1

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 provides an energy storage device and an energy storage method. [Solution] An energy storage device comprising a unit cell in which an electrode and a counter electrode are stacked along the axial direction and separated from each other, and a restraint 130 including tension members 133, 135 having two opposing sides, wherein the tension members are planar, each side of which is coupled to compression members 132, 134, the compression members are arranged perpendicular to the tension members, and the restraint is configured to maintain a pressure on the unit cell greater than other pressures in two axial directions perpendicular to the axis and perpendicular to each other, (a) during use of the device and (b) in the axial direction, and the restraint is operably coupled to the unit cell.

Our invention is about synthesis, fabrication, assembly, packaging, testing of asymmetric flexible supercapacitors utilizing bacterial cellulose, conducting polymer, activated carbon, aqueous electrolyte, having state-of-art pseudocapacitive properties; namely, high-power, high energy and high cycle life. The high capacitive performance of these types of supercapacitors is controlled by the chemical, physical, and electrical properties of the materials used for synthesis and fabrication methods for device assembly and packaging as described here-in. Bacterial cellulose is exposed as a high surface area, fibrous nanomaterial used as a source of carbon fiber for the fabrication of high-performance supercapacitor electrodes. The use of pyrolyzed bacterial cellulose, conducting polymer materials, aqueous electrolytes, non-toxic binders such as carboxy methyl cellulose dispersed in water, device fabrication, and packaging techniques produces batch production of flexible supercapacitors with high performance characteristics.

Provided is a separator for a power storage device, the separator including: a substrate 10 that is a polyolefin microporous membrane containing a polyolefin as a main component; and a coating layer 20 that is arranged on at least one surface of the substrate 10. In this separator, the coating layer 20 contains an inorganic filler 1 and a thermoplastic polymer, the thermoplastic polymer contains a particulate polymer 2 protruding from the surface of an inorganic filler portion L1, and, in the surface observation of the coating layer 20, a coefficient of variation (cv) of the areas (si) of Voronoi polygons obtained by Voronoi tessellation using the protruding particulate polymer 2 as a generator is 0.10 to 0.60.

Provided is a composition for an electrochemical device functional layer with which it is possible to form a functional layer for an electrochemical device that can impart excellent process adhesiveness and blocking resistance to an electrochemical device member such as an electrode or a separator and that can cause an electrochemical device to display excellent electrochemical characteristics. The composition for an electrochemical device functional layer contains a particulate polymer and a binder. The particulate polymer has a molecular weight distribution (weight-average molecular weight (Mw) / number-average molecular weight (Mn)) of not less than 1.0 and not more than 3.0.

A method for making an electrode for an ionic liquid-based supercapacitor comprising two electrodes (anode, cathode) separated by an ionic polymer electrolyte separator, comprising: - a step for making a carbon paste (6) resulting from mixing carbon materials (5), ionic liquids (2) and a binder (4), so as to obtain an active material (6) for said electrode at room temperature, - a step for forming said electrode (11) from mechanically processing said active material (6). A supercapacitor comprising a stack of a cathode electrode, an electrolyte separator and an anode electrode, said cathode and anode electrodes being electrically connected to current collectors, wherein said electrolyte separator comprises a polymer with an ionic liquid and said electrodes comprise a carbon-based active material mixed with an ionic liquid electrolyte and a binder.

The present invention provides a battery-type lithium-ion capacitor and an electronic device. The battery-type lithium-ion capacitor comprises a negative electrode sheet. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active layer provided on at least one surface of the negative electrode current collector. The negative electrode active layer comprises a negative electrode active material, and the negative electrode active material comprises hard carbon and graphite. In the negative electrode active material, the mass percentage of graphite is 2-45%. In the present invention, the graphite in the negative electrode sheet can reduce the consumption of lithium ions by the battery-type lithium-ion capacitor when charging and discharging for the first time, which, overall, improves the efficiency of the battery-type lithium-ion capacitor during charging and discharging for the first time, reduces capacity loss of the battery-type lithium-ion capacitor during charging and discharging, and increases the energy density of the battery-type lithium-ion capacitor.

The present invention relates to a separator substrate, a separator, an electrode assembly, and an electrochemical element, and a separator substrate according to one embodiment of the present invention is characterized by having a surface roughness value (Sa) within a predetermined range. This is characterized by improving the wear resistance of the separator while maintaining good adhesive strength of the separator using it.

The variable capacitor includes a holding portion, a first electrode, and a second electrode. The holding unit is configured so as to be able to hold an ionic liquid. At least one first electrode is provided in the holding portion and is configured so as to apply a direct-current voltage of either positive or negative. At least two second electrodes are provided in a portion where an electric double layer is formed in the ionic liquid of the holding portion when a DC voltage is applied to the first electrode, and are configured so as to be able to be energized with high-frequency power via the holding portion.

The present invention relates to the use of oleaster fruit peel as a separator in energy storage devices. The present invention comprises a method for preparing the peel of oleaster fruit for use as a separator that is completely natural, and the preparation process of which does not involve using any chemicals, require extended periods of time or high costs.

The present invention pertains to a process for the manufacture of a polymer electrolyte membrane comprising a polyacrylonitrile-based polymer and to uses of said electrolyte membrane in various applications, particularly in electrochemical applications.

The present invention provides a method for manufacturing electrodes for energy storage devices and a composition that facilitates the formation of thinner electrode films by reducing the binder material content while maintaining desirable mechanical and / or electrical performance. [Solution] The energy storage device 100 comprises a cathode 102 (104), an anode 104 (102), and a separator 106 between the cathode and the anode, wherein the anode and / or cathode comprises electrode films 112, 114, 116, 118 containing a superfibrillated binder material and carbon. The method for manufacturing the electrode films includes a fibrillation process using a slow rate and / or high processing pressure so that the fibrillation of the binder material can be enhanced. The electrode films contain conductivity-enhancing additives to promote a reduction in equivalent series resistance.

To provide a porous membrane reusable after being used as a separator for an electrochemical device.SOLUTION: The porous membrane according to the present disclosure contains a first resin and a second resin. The first resin and the second resin each have a pyrolysis temperature of 300°C or more.SELECTED DRAWING: None

The invention provides a diaphragm as well as a preparation method and application thereof, the diaphragm comprises a base material and a coating, and the base material comprises polyolefin; the coating is arranged on at least one surface of the base material, and the coating comprises polar group grafted aramid fibers. According to the diaphragm disclosed by the invention, the polar group grafted aramid fiber coating is arranged on the polyolefin base material, so that the functions of rapid transmission and uniform distribution of ions can be regulated and controlled by virtue of excellent thermal stability of the polar group grafted aramid fiber coating; and the cycling stability and safety of electrochemical devices such as batteries and the like at high magnification and high temperature can be realized.

The present invention relates to an electrolyte solution for an electric double-layer capacitor, containing an additive, and an electric double-layer capacitor using same. The technical subject matter of the present invention provides the electrolyte solution for an electric double-layer capacitor, the solution comprising an electrolyte salt, an organic solvent and an additive, wherein the additive is boron trifluoride (BF3), and a reaction thereof with moisture (H2O), which is present in the electric double-layer capacitor, produces hydrogen fluoride (HF) and removes moisture, thereby allowing the electric double-layer capacitor to have high-temperature stability.

An electrolyte solution comprising: an ionic salt compound represented by chemical formula 2; and (ii) an electrolyte solution comprising an electrolytic solvent, wherein the ionic salt compound content is 20-50 weight parts relative to 100 weight parts of the electrolyte solution, and the electrolytic solvent is acetonitrile, glutaronitrile (GN), or a mixture thereof.

The invention relates to an aqueous slurry composition comprising an aqueous-baed polymeric binder and anionic oxide nanoparticles that can be used, for example, in coating of electrodes and / or separators in electrochemical devices. This coating after drying, is highly porous, electronically isolating, and exhibits high dimensional stability at elevated temperatures.

An interlayer for a lithium sulfur battery is provided. The interlayer is produced from an elastic polyelectrolyte liquid (EPL) and a two dimensional conducting material, such as graphene oxide. The EPL is produced from polyphenol, cationic polymer and facilitated ion transport protein. The interlayers are characterised by ion selective transport behaviour and electrocatalytic properties, and separator substrates coated with the interlayer may be usefully incorporated into lithium sulfur batteries.