8results about How to "High tap density" patented technology

The application provides a lithium-rich manganese-based material and a preparation method and application thereof. The chemical general formula of the lithium-rich manganese-based material is Li 1.2+x (Mn a Co b Ni c ) 0.8‑x O2, wherein, -0.2

The application provides a lithium iron phosphate positive electrode material, a preparation method thereof and an electrochemical device. The lithium iron phosphate positive electrode material comprises first particles with a particle size of 1000 nm or more and second particles with a particle size of 500 nm or less. The carbon content of the first particles is 0.4%-0.8%, the specific surface area of the first particles is 4 m 2 / g-8.0 m 2 / g, the carbon content of the second particles is 1.5%-2.0%, and the specific surface area of the second particles is 15 m 2 / g-20 m 2 / g. The first particles and the second particles have carbon content and specific surface area adjusted, and are mixed and graded so that the lithium iron phosphate positive electrode material has high compactness and long cycle performance.

This invention discloses the contents of a Tibetan Artemisia capillaris capsule, which is prepared from the following raw and excipient materials in weight percentages: 55%–59% filler, 3%–6% flow aid, and the remainder being Tibetan Artemisia capillaris extract; the Tibetan Artemisia capillaris extract is an alcoholic extract of Tibetan Artemisia capillaris. The Tibetan Artemisia capillaris granules of this invention not only meet the quality requirements of the pharmacopoeia but also have low cost, making them suitable for large-scale industrial production.

A high-capacity, dense anode material and its preparation method are disclosed. The preparation includes: mixing graphite micropowder with a first forming agent, such as asphalt, and a second additive, such as ammonium dihydrogen carbonate, to form a mixture; pressing the mixture into a blank; heat-treating the blank under a protective atmosphere to form a sinter; pulverizing the sinter into powder; mixing the powder with a third coating agent, such as phenolic resin, to form a homogenized material; and carbonizing the homogenized material to form, for example, a lithium-ion battery anode material. The anode material prepared by this invention can effectively shorten the migration distance during lithium-ion diffusion, greatly improve the rate performance of the material, effectively reduce defects on the surface and in the bulk of the graphite anode, ensure the formation of a smooth and stable specific surface area, further ensure the stable formation of the SEI film and structural stability during cycling, and effectively guarantee the material's high initial efficiency, high capacity, and long cycle performance.

This invention provides a nickel-core ceramic composite powder, a slurry, a preparation method thereof, and a multilayer ceramic capacitor; wherein the nickel-core ceramic composite powder comprises core-shell particles, the core-shell particles comprising a nickel core and a ceramic layer covering the nickel core, wherein the nickel core and the ceramic layer are bonded together by a coupling agent; the slurry is obtained by mixing the nickel-core ceramic composite powder, a slurry solvent, and a binder; the internal electrode in the multilayer ceramic capacitor can be made from the nickel-core ceramic composite powder or a slurry containing the nickel-core ceramic composite powder.

This invention provides a high-pressure compacted sodium iron pyrophosphate cathode material, its preparation method, and its application. The preparation method of the high-pressure compacted sodium iron pyrophosphate cathode material includes: weighing sodium, iron, and phosphorus sources according to the stoichiometric ratio of sodium iron pyrophosphate, adding carbon source and solvent, and mixing and grinding to obtain a precursor slurry; spray drying the precursor slurry to obtain precursor powder; compacting and granulating the precursor powder under a pressure of 10 MPa to 80 MPa to obtain denser precursor particles; and finally sintering at 500℃ to 650℃ for 6 to 15 hours under an inert atmosphere. This invention effectively eliminates internal cavities and interparticle gaps in the precursor through compaction and granulation, and controls the pressure within the range of 10 MPa to 80 MPa. The subsequent sintering process improves the density of the cathode material while controlling the impurity phase content to below 1 wt% and maintaining good electrochemical performance.

The present application relates to the technical field of carbon nanotubes, in particular to a high tap density carbon nanotube and a preparation method thereof, the preparation method comprising: feeding the carbon nanotubes mixed with oily materials into a screw extruder to obtain the product. The present application mixes the carbon nanotubes with oily materials, shortens the distance between adjacent carbon nanotubes through the mutual attraction of the two, and prepares for improving the tap density of the carbon nanotubes, and then extrudes the carbon nanotubes through the screw extruder; a part of the oily materials will be pressed into the cavities of the carbon nanotubes during the extrusion, which promotes the further mixing of the carbon nanotubes and the oily materials, further shortens the distance between adjacent carbon nanotubes, removes the oily materials in the extrusion step, improves the tap density, and the tap density of the prepared product reaches 0.21 g / cm 3 , simplifies the subsequent purification operation, reduces the transportation cost of the carbon nanotubes, and is environmentally friendly and pollution-free.

This invention relates to the field of waste graphite recycling technology, specifically to recycled graphite and its preparation method, graphite negative electrode sheets, and batteries. The preparation method of recycled graphite includes: sequentially subjecting a dispersion containing waste high-purity graphite powder to precision filtration, spray drying, and microwave heating, wherein the impurity content in the waste high-purity graphite powder is less than 100 ppm. This preparation method can achieve "cost reduction and quality improvement" in the recycling of waste graphite, reducing production costs and improving the performance of the recycled graphite. In particular, it can improve the particle size uniformity, specific surface area, and tap density of the recycled graphite, thereby improving the initial coulombic efficiency and initial discharge specific capacity of the battery formed from it.