664results about "Hybrid capacitor separators" patented technology

The application provides a cement-based zinc ion hybrid capacitor, a preparation method thereof and application of the capacitor in an energy storage device. The cement-based zinc ion hybrid capacitor comprises an active carbon positive electrode, a zinc foil negative electrode and a composite air-entraining mortar interlayer arranged between the two electrodes. The active carbon positive electrode is active carbon loaded on a carrier with good conductivity, and the carrier is any one of carbon-based materials such as carbon felt, carbon fiber and graphite plate or any one of foils, meshes and foams of metals such as stainless steel, copper, titanium and nickel and alloys thereof. The composite air-entraining mortar interlayer between the two electrodes is immersed in an electrolyte under negative pressure. The composite air-entraining mortar has interconnected pores, and ions are transmitted through the electrolyte in the pores and participate in electrode reactions. The application mainly provides a porous cement-based solid electrolyte based on a composite air-entraining technology and a structural electrochemical energy storage device, and the structural energy storage device can simultaneously have good energy storage characteristics and mechanical properties.

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.

A separator for an electrochemical device having a porous polymer substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous polymer substrate. The porous coating layer includes a dispersing agent, a mixture of inorganic particles and a particle-type binder polymer, and a polyvinyl pyrrolidone binder polymer positioned on the whole or a part of the surface of the inorganic particles in the mixture of the porous coating layer to connect and fix the inorganic particles with one another. The content of the polyvinyl pyrrolidone binder polymer is 2 to 20 parts by weight based on 100 parts by weight of the total content of the particle-type binder polymer and the polyvinyl pyrrolidone binder polymer.

The invention discloses a cylindrical supercapacitor with a positive electrode and a negative electrode located on the same side of a roll core and a processing technology. The cylindrical supercapacitor comprises a shell, the roll core arranged in the shell and a cover plate arranged on the opening side of the shell. A roll core center hole is formed in the center of the roll core, and a negative pole column containing a liquid injection hole is arranged on the cover plate; a positive tab and a negative tab are arranged on the end face, close to the cover plate, of the roll core, surround a center hole of the roll core and are symmetrically arranged, the positive tab and the negative tab are arranged in an annular structure composed of discontinuous arc sections, and the negative tab is located on the inner side of the annular structure. A gap for placing an insulating ring is reserved between the outer edge part of the negative tab and the inner edge part of the positive tab on the outer side of the annular structure; the positive pole lug and the negative pole lug are respectively and correspondingly provided with a positive pole current collecting disc and a negative pole current collecting disc, the positive pole current collecting disc is connected with the upper edge of the slot rolling position on the inner wall of the shell, and the negative pole current collecting disc is connected with a cover plate provided with a negative pole column.

The present invention provides a separator for power storage devices, the separator having excellent heat resistance and being capable of providing a power storage device with excellent charge and discharge cycle characteristics.　This separator for power storage devices comprises: a multilayer body of a porous base material and a ceramic layer; and a resin layer that is loaded on at least one surface of the multilayer body. The resin layer is configured from a polyether copolymer and / or a crosslinked product of the polyether copolymer. With respect to this separator for power storage devices, the polyether copolymer is composed of 2 to 40% by mole of a repeating unit that is derived from a monomer represented by formula (1), 98 to 60% by mole of a repeating unit that is derived from a monomer represented by formula (2), and 0 to 15% by mole of a repeating unit that is derived from a monomer represented by formula (3); the weight per square meter of the resin layer is 0.4 g / m2 to 3.0 g / m2; and the ratio between the Gurley values before and after loading of the resin layer is 200% or more.

A zinc (Zn) ion hybrid supercapacitor (ZIHSC) in the form of an electrochemical cell includes a Zn nanosheets electrodeposited metal substrate (Zn ED-MS) as an anode, and a jute activated carbon coated conductive carbon substrate (the JAC-CCS) as a cathode, an electrolyte including an aqueous solution of Zn salt at a concentration of 0.05 to 5 molars (M), and a membrane as a separator.

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.

The invention discloses a carbon-based aqueous zinc ion supercapacitor and a preparation method thereof, and belongs to the technical field of zinc ion supercapacitors. The capacitor comprises a positive electrode, a negative electrode, a multi-element electrolyte and a porous diaphragm, the anode is an activated carbon composite material; the negative electrode is a rolled zinc foil; the multi-element electrolyte is a mixed system aqueous solution formed by dissolving zinc trifluoromethanesulfonate, zinc sulfate, zinc chloride, zinc perchlorate and an electrolyte additive in deionized water; and the porous diaphragm is glass fiber. The preparation method comprises the following steps: uniformly mixing the activated carbon composite material, the conductive black and the binder in proportion, adding the organic solvent, grinding into slurry, coating the slurry on the carbon paper, performing vacuum drying to obtain the positive electrode plate, and assembling the positive electrode plate with the multi-element electrolyte, the negative electrode and the porous diaphragm. The raw material cost and the energy consumption are low, the operability is greatly improved, and the repeatability is good.

The purpose of the present invention is to provide an adhesive composition for a functional layer of an electrochemical element, said adhesive composition having excellent redispersibility after long-term storage and being capable of causing the functional layer to exhibit excellent adhesiveness. The present invention is a binder composition for a functional layer of an electrochemical element, the binder composition comprising a particulate polymer, a water-soluble polymer, and water, the particulate polymer having a volume particle diameter (D50) of 1.0-15.0 [mu] m and a true specific gravity of 1.00-2.00.

The separator according to the present invention contains a particulate binder resin containing a mixture of an acrylic binder and a PVDF binder in the organic / inorganic composite porous coating layer, and has excellent adhesive strength with the electrode in both dry and wet states. Therefore, in a continuous roll-to-roll process in which an electrode assembly is manufactured by laminating an electrode and a separator, the shape stability and processability of the electrode assembly are improved. In addition, when a battery is manufactured using an electrode assembly including the separator, a high binding strength can be maintained between the separator and the electrode even when the battery is immersed in an electrolyte, and the interface resistance characteristics are not reduced. In addition, since the binder resin particles maintain a high adhesive strength in both dry and wet states, the inorganic particles contained in the organic / inorganic composite porous coating layer are well fixed without being detached, and the shape stability of the separator can be improved. Therefore, the heat resistance safety and insulation properties of the battery are improved. In addition, since the porous coating layer has a porous structure due to the interstitial volume between the particles, it does not interfere with ion conduction between the electrode and the separator, and has a low resistance increase rate and excellent life characteristics.

The present application provides an ultra-high molecular weight polyolefin separator comprising ultra-high molecular weight polyethylene, the ultra-high molecular weight polyethylene having an average molecular weight of ≥ 1 million, wherein the ultra-high molecular weight polyolefin separator has a median pore size of 0.04 μm to 1 μm, a maximum pore size not exceeding 1.2 μm, and a puncture strength of ≥ 50 gf. The present application also provides a method for producing the ultra-high molecular weight polyolefin separator, which is safer than conventional nonwoven fabric separators and has higher ionic conductivity and a larger median pore size, thereby solving the problem that conventional nonwoven fabric separators in lithium batteries have high lithium ion permeability but are very dangerous and prone to short-circuiting the battery.

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,

Provided is a separator which includes: a separator base including a porous polymer substrate having a plurality of pores, and a porous coating layer positioned on at least one surface of the porous polymer substrate and containing a plurality of inorganic particles and a binder polymer positioned on the whole or a part of the surface of the inorganic particles to connect the inorganic particles with one another and fix them; and a porous adhesive layer positioned on at least one surface of the separator base and including polyvinylidene-co-hexafluoropropylene containing vinylidene-derived repeating units and hexafluoropropylene-derived repeating units, wherein the ratio of the number of the hexafluoropropylene (HFP)-derived repeating units (HFP substitution ratio) based on the total number of the vinylidene-derived repeating units and the hexafluoropropylene-derived repeating units is 4.5-9%. An electrochemical device including the separator is also provided.

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.

An energy storage apparatus suitable for mounting on a printed circuit board using a solder reflow process is disclosed. In some embodiments, the apparatus includes: a sealed housing body (e.g., a lower body with a lid attached thereto) including a positive internal contact and a negative internal contact (e.g., metallic contact pads) disposed within the body and each respectively in electrical communication with a positive external contact and a negative external contact. Each of the external contacts provide electrical communication to the exterior of the body, and may be disposed on an external surface of the body. An electric double layer capacitor (EDLC) (also referred to herein as an "ultracapacitor" or "supercapacitor") energy storage cell is disposed within a cavity in the body including a stack of alternating electrode layers and electrically insulating separator layers. An electrolyte is disposed within the cavity and wets the electrode layers. A positive lead electrically connects a first group of one or more of the electrode layers to the positive internal contact; and a negative lead electrically connects a second group of one or more of the electrode layers to the negative internal contact.

To provide a power storage device which is small in degradation in charge / discharge characteristics owing to a heat treatment, or a power storage device which is high in safety during a heating process.SOLUTION: A power storage device comprises a positive electrode, a negative electrode, a separator, an electrolyte, and an outer packaging body. The separator is located between the positive and negative electrodes, and contains polyphenylene sulfide or cellulose fiber. The electrolyte contains propylene carbonate, ethylene carbonate, vinylene carbonate, lithium hexafluorophosphate, and lithium bis(pentafluoroethanesulfonyl)amide. The concentration of the lithium hexafluorophosphate is 0.01 wt.% or more and 1.9 wt.% or less in weight percentage to the electrolyte.SELECTED DRAWING: Figure 43