11results about How to "Increase volume capacity" patented technology

The utility model provides a battery, a battery module and electric equipment, and relates to the technical field of batteries, the battery comprises a first shell, a second shell, a cover body, a partition plate and a battery, the second shell is arranged in the first shell, and one part of the second shell is connected with the inner wall surface of the first shell; the partition plate is arranged in the first shell and divides the second cavity into a first liquid cooling channel and a second liquid cooling channel, the first liquid cooling channel is provided with a first liquid conveying opening, the second liquid cooling channel is provided with a second liquid conveying opening, a second end, away from the first end, of the partition plate is provided with a communication opening, and the battery is arranged in the first cavity. According to the battery, the battery module and the electric equipment provided by the utility model, liquid cooling can be carried out on the battery, and cooling liquid flows through a liquid cooling flow channel formed by the first liquid cooling channel and the second liquid cooling channel and can cover the whole surface of the battery, so that the liquid cooling effect on the battery is further improved; and the balance of the maximum capacity performance and better liquid cooling of the battery is realized.

The application discloses a low-reversibility lithium iron phosphate precursor prepared by a reaction type emulsion method and a preparation method and application thereof. The lithium iron phosphate precursor material meets the following two conditions: ①2.44-2.86 g / cm 3 , and ②0.4<=<=2.5, wherein C is an average circularity, the circularity=(4*π*A) / G 2 ; wherein ρ is the density of the lithium iron phosphate precursor material measured by a gas displacement method, K 90 =(Dv90-Dv10) / Dv50, A is the projected area of a particle sample of the lithium iron phosphate precursor material, and G is the projected perimeter of the particle sample of the lithium iron phosphate precursor material. The lithium iron phosphate precursor material has a high tap density and good processing performance, the lithium iron phosphate prepared by a carbon reduction method from the lithium iron phosphate precursor material has a high tap density, thereby having a high volume specific capacity, and the prepared battery has a high energy density.

A planetary gear reducer (10) for an aircraft turbine engine, the gear reducer comprising a rotatable sun gear, a rotatable ring gear (9) and planetary gears, the planetary gears meshing with the sun gear and the ring gear and carried by a planet carrier intended to be fixed to a stator, the gear reducer further comprising an annular groove for recovering and guiding lubricating oil, the annular groove being installed around the ring gear, characterized in that the gear reducer further comprises an annular guide portion (22), the annular guide portion being fixed to the ring gear and being configured to guide radially outflowing oil toward the outside of the ring gear to the groove by means of centrifugal force, the groove comprising an annular chamber (18) and an annular duct (20), the annular chamber being axially away from a central plane (P) substantially passing through the center of the ring gear, the annular duct being located on one side of the chamber and entering the chamber.

This invention discloses a perforated chip capacitor and its manufacturing method. The capacitor uses an integral aluminum plate with multiple through holes forming a perforated structure, and at least some of the through holes penetrate the aluminum plate. An oxide layer is formed on the entire surface of the aluminum plate, including the inner surface of the through holes. The manufacturing method includes: welding an anode lead plate to the aluminum plate; laser drilling the aluminum plate to form through holes; acid etching to increase the specific surface area; anodizing to form an oxide layer; and sequentially forming a polymer layer, a graphite layer, and a silver paste layer. This invention, through its integrated porous aluminum plate structure, replaces the traditional multi-layer laminated structure, effectively improving the problems of high leakage current, poor heat dissipation, and insufficient vibration resistance of multilayer capacitors. It also achieves high specific capacitance and low ESR, significantly improving the overall performance and reliability of the capacitor.

The application relates to a phosphorus-sulfur co-doped hard carbon material, a preparation method and a sodium ion battery, and belongs to the technical field of secondary batteries. In the material, the carbon layer crystal face parameter satisfies d 002 = 0.36-0.39 nm, L c = 1.20-1.40 nm, L a = 6.00-6.40 nm; the phosphorus and sulfur doped heteroatoms are in a locally enriched and overall uniform distribution mode; in the material, the content of phosphorus is 0.367%-0.457%, and the content of sulfur is 0.949%-1.183%. A three-step special process of "solvent low-speed dilution-winding reinforcement crosslinking-gradual temperature increase directional carbonization" is adopted, and the heteroatom doping and the construction of the dense carbon skeleton are realized by relying on the winding characteristics of the high-viscosity precursor molecules. The material has excellent electrochemical performance, specifically good cycle stability, high volume specific capacity and excellent rate performance.

The invention relates to a silicon-based negative electrode material and a preparation method and application thereof. The silicon-based negative electrode material comprises a soft carbon base material, nano silicon, a conductive carbon material and a fast ion conductor, the nano silicon, the conductive carbon material and the fast ion conductor are distributed in the soft carbon base material, the ionic conductivity of the fast ion conductor is 10 <-5 > S.cm <-1 >-10 <-2 > S.cm <-1 >, the ionic conductivity activation energy is 0.2 eV-0. 4eV, and the fast ion conductor forms a negative ion phase on the surface of the conductive carbon material; under the current density of 200mA. G <-1 >, the change rate of the metal ion concentration on the surface of the silicon-based negative electrode material is less than or equal to 10% before and after 50 cycles of circular treatment. The silicon-based negative electrode material disclosed by the invention has electron-ion conduction performance, can be used for improving the battery performance and prolonging the cycle life when being used for the lithium ion battery, and is beneficial to guaranteeing the use safety of the battery.

The invention relates to the technical field of lithium ion batteries, in particular to a phosphate positive electrode material and a preparation method and application thereof. According to the present invention, the phosphate-based positive electrode material is provided, the phosphate-based positive electrode material comprises a phosphate-based core and a carbon coating layer, the carbon coating layer comprises a flocculent carbon coating layer, and the flocculent carbon coating layer is prepared from a chelated organic carbon material. The obtained phosphate positive electrode material is high in compaction density and large in volume specific capacity, and meets the requirements of high magnification, high stability and high conductivity at the same time.

The invention provides a preparation method of lithium / sodium doped gallium nitride, lithium / sodium doped gallium nitride and application, the preparation method comprises the following steps: S1, melamine, a benzene solution of gallium trichloride and lithium nitrate or sodium nitrate are ground and mixed to obtain a mixture A, n (melamine) = n (gallium trichloride) + n (lithium nitrate or sodium nitrate), and n represents the amount of substance; s2, transferring the mixture A into a reaction furnace, heating the reaction furnace to 800 DEG C under the protection of gas, keeping the temperature for 6 hours, and naturally cooling to room temperature to obtain a solid B; and S3, washing and drying the solid B to obtain the lithium / sodium doped gallium nitride powder. According to the preparation method of the lithium / sodium-doped gallium nitride, regulation and control of the macrostructure and the microstructure of the lithium / sodium-doped gallium nitride are realized by controlling the molar ratio of gallium trichloride to lithium nitrate or gallium trichloride to sodium nitrate, the preparation method is simple and reliable, and the effect of improving the interface energy storage of the gallium nitride is remarkable.

The present invention discloses a nitrogen-doped bismuth / carbon composite microsphere material and a preparation method and application thereof, including: a micron carbon sphere matrix material, wherein a plurality of nano-bismuth particles are uniformly embedded inside the micron carbon sphere, each nano-bismuth particle is tightly wrapped by a carbon matrix to form a dense bismuth / carbon composite sphere, and a nitrogen-doped structure; due to the dense spherical structure of the nitrogen-doped bismuth / carbon composite microsphere material, the tight combination of bismuth and carbon, and the doping of nitrogen, when applied to sodium ion batteries, it can effectively alleviate the volume expansion of the material, accelerate the carrier transfer rate, and shorten the charge and discharge time. The present invention provides a method for preparing a nitrogen-doped bismuth / carbon composite microsphere material, including the steps of: S10: preparing bismuth / organic microspheres; S20: the bismuth / organic microspheres in S10 are sintered and carbonized to obtain the nitrogen-doped bismuth / carbon composite microsphere material.

The invention provides a nitrogen-doped carbon-based composite electrode material and a preparation method and application thereof. The method comprises the following steps: impregnating melamine sponge in a suspension formed by mixing activated carbon, a conductive agent, a binder and a solvent, drying the impregnated melamine sponge, calcining in an anaerobic atmosphere, and cooling to obtain the nitrogen-doped carbon-based composite electrode material. The nitrogen-doped carbon-based composite electrode material disclosed by the invention is prepared by the method. The invention also provides an application of the nitrogen-doped carbon-based composite electrode material as a self-supporting electrode in an energy storage and conversion device. According to the technical scheme, the nitrogen doping level of the electrode material can be improved, the self-supporting function of the electrode is achieved, and the mass transfer efficiency of the electrode is improved.

The invention discloses a preparation method of a ruthenium dioxide-graphene-TALP thick and dense electrode, and relates to a preparation method of a thick and dense electrode. The invention aims to solve the problems that the ruthenium dioxide-graphene thick and dense electrode cannot be prepared by the existing method, and the application of the ruthenium dioxide-graphene thick and dense electrode on a supercapacitor is limited to a certain extent. The preparation method comprises the following steps: 1, preparing TALP dispersion liquid; 2, performing ultrasonic dispersion treatment on the graphene nanosheets; 3, hydrolyzing to prepare a ruthenium dioxide-graphene nanosheet dispersion liquid; (4) preparing a ruthenium dioxide-graphene-TALP nanosheet dispersion liquid; and 5, performing mechanical compaction to prepare the ruthenium dioxide-graphene-TALP thick and dense electrode. The ruthenium dioxide-graphene-TALP thick and dense electrode prepared by the invention has the characteristics of high density and thickness, excellent conductivity, good volume capacitance performance and the like, and can be used as an electrode of a supercapacitor.