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10 results about "Electric double-layer capacitor" patented technology
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Electrical double-layer capacitors are, together with pseudocapacitors, part of a new type of electrochemical capacitors called supercapacitors, also known as ultracapacitors. Supercapacitors do not have a conventional solid dielectric. The capacitance value of an electrochemical capacitor is determined by two storage principles: Double-layer capacitance – electrostatic storage of the electrical energy achieved by separation of charge in a Helmholtz double layer at the interface between the surface of a conductor electrode and an electrolytic solution electrolyte. The separation of charge distance in a double-layer is on the order of a few Ångströms and is static in origin. Pseudocapacitance – Electrochemical storage of the electrical energy, achieved by redox reactions electrosorption or intercalation on the surface of the electrode by specifically adsorbed ions that results in a reversible faradaic charge-transfer on the electrode. Double-layer capacitance and pseudocapacitance both contribute to the total capacitance value of a supercapacitor. However, the ratio of the two can vary greatly, depending on the design of the electrodes and the composition of the electrolyte.
Method for manufacturing carbon materials and electric double layer capacitor
To provide a high-density carbon material, or a carbon material with controlled density, while being a graphene mesosponge. Also, to provide an electric double-layer capacitor with high energy density per unit volume. [Solution] A method for manufacturing a carbon material, comprising: a composite formation step of forming a carbon layer on the surface of a mold material by chemical vapor deposition using a carbon-containing raw material gas to obtain a carbon layer coated mold material; a mold material removal step of removing the mold material and isolating the carbon material by contacting the carbon layer coated mold material with an acid that dissolves the mold material; an impregnation step of impregnating the carbon material with a shrinking liquid; and a drying shrinkage step of drying and shrinking the carbon material impregnated with the shrinking liquid; and an electric double layer capacitor suitable for manufacture using this manufacturing method.
Owner:3DC INC
A polyester film for an electric double layer capacitor and a lithium ion battery
This invention discloses a polyester membrane comprising: multiple channels spaced apart within the polyester membrane, each channel including a closed chamber; a mixed flame-retardant liquid filled within the chamber, the mixed flame-retardant liquid comprising a free radical scavenging material and a thermal transition material, the thermal transition material comprising a thermosetting polymer and / or a thermo-induced phase change substance; when preset conditions are met, the polyester membrane ruptures, and the mixed flame-retardant liquid flows out from the chamber. The free radical scavenging material is used to block the combustion reaction, and the thermal transition material is used to form a physical barrier layer. The preset thermal runaway emergency condition corresponds to the condition when the battery cell has a risk of thermal runaway. The mixed flame-retardant liquid can be rapidly released based on the preset conditions, achieving combustion reaction blocking through free radical scavenging, combined with the physical barrier effect, effectively curbing the spread of thermal runaway and significantly improving the safety protection level of the battery cell. This invention also discloses a lithium-ion battery.
Owner:SHANGHAI XUANYI NEW ENERGY DEV CO LTD
An electrode sheet, an electrode, an electrode assembly, an electric double layer capacitor, an electric storage device, and a power storage device
The application provides an electrode sheet, an electric core, a battery, a battery pack and an electric equipment, and relates to the technical field of batteries.The electrode sheet comprises a current collector, the thickness of the current collector is D2; an active material layer, the active material layer covers at least one surface of the current collector, a plurality of grooves are arranged on the side of the active material layer away from the current collector, the minimum distance between two adjacent grooves is Q, and the thickness of the active material layer is D1; wherein 0.67 mu m <= D1 <= 75 mu m, so that the wettability of electrolyte to the active material layer can be improved by the grooves, and the capacity of the electric core can be ensured.
Owner:CALB GROUP CO LTD
IN-SITU TESTING OF ELECTRICAL DOUBLE-LAYER CAPERS IN ELECTRICAL METERS
ActiveDE602021055905T2Resistance/reactance/impedenceMechanical engineeringElectric double-layer capacitor
Owner:LANDIS & GYR TECHNOLOGIES LLC
Electrolyte suitable for electric double layer capacitor and preparation method and application thereof
This invention discloses an electrolyte suitable for electric double-layer capacitors, its preparation method, and its application, belonging to the field of electrochemical energy storage technology. The electrolyte comprises an organic solvent, an electrolyte salt, and additives, wherein the additives are fluorinated acrylate additives. The electrolyte of this invention, applied to 2.5~2.8V electric double-layer capacitors, can suppress hydrolysis gas generation and electrode micropore blockage induced by trace amounts of moisture under high-temperature float charging through the synergistic effects of ion solvation sheath reconstruction, interface property regulation, and steric hindrance polymerization. This results in a reduction of more than half in cell volume expansion, a reduction of more than 27.9% in internal resistance increase, an improvement of capacity retention of more than 6.4%, and a reduction of more than 59.7% in electrolyte free acid content after 8 weeks of float charging at 65℃ and 2.9V. Furthermore, only trace amounts are needed to significantly extend the high-temperature service life of the cell without sacrificing the initial conductivity and capacity of the electrolyte, greatly improving the high-temperature degradation problem of existing AN-based electric double-layer capacitors.
Owner:SHENZHEN TIG TECHNOLOGY CO LTD
A double-sided gradient microstructure array electric double layer capacitor flexible sensor and a preparation method and application thereof
This invention relates to a double-sided gradient microstructure array double-layer capacitive flexible sensor, its fabrication method, and its applications, belonging to the field of flexible sensor technology. On one hand, the invention employs an ion-gel film as the dielectric layer, utilizing its ability to form a thin double layer at the electrode interface to impart high intrinsic sensitivity to the device. On the other hand, it modulates the double-sided gradient micro-pyramid array coated with ion-gel. Through gradient design of microstructure size and array distribution density, large-size micro-pyramids preferentially respond at low pressure, ensuring high sensitivity. As pressure increases, double-sided gradient micro-pyramids of different sizes gradually participate in contact, causing the effective contact area to continuously increase with pressure, thereby significantly widening the sensor's detection range. This invention effectively solves the problem of the mutual constraint between sensitivity and detection range in flexible capacitive sensors, providing an effective approach for developing flexible sensors with both high sensitivity and wide detection range.
Owner:NORTHEAST GASOLINEEUM UNIV
An electrode group of an electric double layer capacitor and an electric double layer capacitor
The application belongs to the technical field of batteries, and specifically discloses a battery cell pole group and a battery cell. The battery cell pole group comprises a pole group main body, a first boss and a second boss. Two first bosses are arranged on each end of the pole group main body along a first direction, and the two first bosses are arranged on the pole group main body in a spaced and symmetrical manner along a second direction. The first boss is used for cooperating with a containing space on a battery cell cover plate. A second boss is arranged on each end face of the pole group main body arranged oppositely along a third direction, and two second bosses are arranged symmetrically on both sides of the pole group main body along the third direction. The arrangement of the first boss and the second boss can increase the volume of the battery cell pole group, thereby improving the capacity of the battery cell. Moreover, the whole battery cell pole group adopts a completely symmetrical design scheme, which can reduce the process window during the assembly of the battery cell pole group, the battery cell cover plate and the battery cell shell, and improve the process yield. The application also provides a battery cell comprising the above battery cell pole group.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD
Advanced lithium-ion energy storage device
A lithium ion capacitor includes binder free positive and negative electrode active layers. The capacitor exhibits high energy density, power density and cycle life and provides a good compromise in performance between an electric double layer capacitor and a lithium ion battery.
Owner:NANORAMIC INC
A balancer for electric double layer capacitors
The present invention relates to a double layer capacitor balancer for balancing current flowing through a first double layer capacitor and a second double layer capacitor connected in series with each other in sequence between a power line and a common line, which can maximize charging energy efficiency by controlling the same current flowing through both double layer capacitors while allowing deviation within a range in which charging voltages of both double layer capacitors are not problematic. It includes a first resistor, a second resistor, and a third resistor connected in series with each other in sequence between the power line and the common line; a first transistor having a base terminal electrically connected between the first resistor and the second resistor and connected in parallel with the first double layer capacitor; and a second transistor connected in series with the first transistor and having a base terminal electrically connected between the second resistor and the third resistor and connected in parallel with the second double layer capacitor.
Owner:GOCHIP CO LTD