32results about How to "Increase capacity value" patented technology

The invention is to provide such an antenna module making broadband of transmitting and receiving frequencies, while realizing miniaturization. The invention has a structure comprising a mounting body; a chip antenna having a substrate mounted on the mounting body and a substrate and a couple of terminal parts provided on the substrate; an feeding portion to which one of the terminal parts provided on the mounting body is connected; a open portion to which the other of the terminal parts provided on the mounting body is connected; and a capacitive conductor provided in opposition to the substrate, thereby to make use of a bottom area hidden when mounting the chip antenna so as to increase capacitive components for realizing broadband of the antenna module.

The present invention pertains to a process for manufacturing a film, said process comprising: (i) providing a composition [composition (C)] comprising, preferably consisting of: - at least one fluoropolymer [polymer (F)] comprising recurring units derived from at least one fluorinated monomer comprising a -SO 3 M functional group, wherein M is an alkaline metal [monomer (FM)] and - a liquid medium [medium (L)] comprising at least 50% by weight, based on the total weight of said medium (L), of at least one alkyl carbonate; (ii) processing the composition (C) provided in step (i) into a film; and (iii) drying the film provided in step (ii). The present invention further pertains to use of said film in a process for manufacturing a lithium electrode and to use of said lithium electrode in a process for manufacturing a lithium-sulphur battery.

The present invention pertains to an aqueous composition comprising: (A) an aqueous latex comprising at least one vinylidene fluoride (VDF) polymer [polymer (F)] comprising recurring units derived from vinylidene fluoride (VDF) and at least one (meth)acrylic monomer (MA) having formula (I) here below: wherein: —R1, R2 and R3, equal to or different from each other, are independently selected from a hydrogen atom and a C1-C3 hydrocarbon group, and —ROH is a hydrogen atom or a C1-C5 hydrocarbon moiety comprising at least one hydroxyl group, (B) at least one powdery electrode material, and (C) optionally, less than 10% by weight, based on the total weight of the aqueous composition, of at least one organic solvent (S), wherein the polymer (F) in the aqueous latex is under the form of primary particles having an average primary particle size of less than 1 μm, as measured according to ISO 13321. The present invention also pertains to a process for manufacturing an electrode using said aqueous composition, to an electrode comprising a metal substrate coated on at least one surface with said aqueous composition and to use of said electrode for manufacturing a non-aqueous-type electrochemical device.

The invention belongs to the field of new energy automobile storage batteries, and specifically relates to a simple maintenance method for fast charging capacity nickel-metal hydride batteries in lineoperation vehicles. The method comprises the following steps of testing the internal resistance of single batteries in turn, eliminating failed batteries with the internal resistance higher than 200%of the average internal resistance of this type of new batteries; replenishing water to single capacitor batteries in turn taking a battery box as an operation unit, determining replenishing volume according to the internal resistance, sealing; replacing the eliminated failed batteries with standby capacitive nickel-metal hydride batteries matched with the internal resistance of the whole vehicle. The method introduces an internal resistance index to replace the traditional voltage index, so that abnormal batteries or failed batteries are easier to be judged; the cost is low, and the method can directly determine the water replenishment volume for the fast-charging nickel-metal hydride batteries according to the internal resistance, compared with sealed batteries needed for conventional weighing and water replenishment, and the operation saves time and labor; the maintenance effect is obvious. The internal resistance of the capacitive nickel-metal hydride batteries treated by the method provided by the invention is reduced by 10%-60% compared with that before the treatment; the capacity value is increased by 5%-30%.

The invention discloses a preparation method of a lithium iron phosphate / carbon nanotube microsphere positive electrode material, a positive electrode material and an optimization method of a water-based lithium ion capacitor, and relates to the field of electrochemical energy storage. The specific scheme is: preparing carbon nanotube microspheres and Lithium iron phosphate precursor solution; carry out negative pressure vacuum infiltration of carbon nanotube microspheres and lithium iron phosphate precursor solution to obtain the precursor, after drying and high temperature carbonization treatment, obtain lithium iron phosphate / carbon nanotube microsphere positive electrode material, and It is applied to optimize aqueous lithium-ion capacitors. The preparation method provided by the invention has sufficient and cheap raw materials, is environmentally friendly, has a high capacity value, and has a stable crystal structure, reduces experiment costs, and the product has no pollution to the environment. The resulting positive electrode material has a high specific capacitance value. After the material is used to optimize the capacitor, the obtained capacitor has good rate characteristics and good cycle life, and the comprehensive electrochemical performance of the capacitor has been improved as a whole.

The invention discloses a high-voltage lithium nickel manganese oxide / graphite lithium ion battery and a manufacturing method thereof, and proposes modifying the surface of the negative electrode with an organic acid ester to change the components of the SEI film and strengthen the stability of the interface between the electrolyte and the electrode. So as to effectively curb the rapid decline of capacity. In the present invention, by optimizing the electrolyte, adding functional additives to the traditional organic electrolyte, the initial efficiency of the battery is improved, the self-discharge of the battery is suppressed, the specific capacity of the battery is increased, and a battery with a high specific capacity and a long cycle is realized. In order to further stabilize the efficient operation of the LNMO / graphite lithium-ion battery with high specific capacity and long cycle life, and further improve the stability of the battery, the present invention also proposes to modify the positive electrode. The LNMO@LTO cathode material is prepared by coating LNMO with Li4Ti5O12. The coating layer can effectively avoid the direct contact between the electrolyte and the active material body, reduce the overflow of Mn from the cathode material, and reduce the further catalytic effect of Mn on the SEI film, making the system more stable.

The invention relates to a tungsten carbide-embedded carbon nanofiber composite membrane and a preparation and an application thereof. The composite membrane is of a three-dimensional porous structure; an ammonium tetrathiotungstate / polyacrylonitrile nanofiber membrane is prepared through electrostatic spinning; and the tungsten carbide / carbon nanofiber composite membrane is prepared through one-step high-temperature carbonization reduction in an argon-hydrogen atmosphere. The tungsten carbide-embedded carbon nanofiber composite membrane is applied as an electrode material of a lithium-ion battery and a super capacitor. The prepared tungsten carbide / carbon nanofiber composite material has excellent conductivity and electrochemical activity.