5results about How to "Moderate surface area" patented technology

The invention provides a lithium manganate positive electrode material and a preparation method thereof, a positive plate and a battery, and belongs to the technical field of batteries, the structural general formula of the lithium manganate positive electrode material is Li1 + xMyMn2-(x + y) O4, x is greater than or equal to 0.1 and less than or equal to 0.33, y is greater than or equal to 0.005 and less than or equal to 0.01, M comprises at least one of Co, Ni, Cr and Fe, and the 111 crystal face diffraction peak intensity I111 of the lithium manganate positive electrode material is greater than 3100. According to the lithium manganate positive electrode material, the energy density, the effective gram volume and the structural stability of the lithium manganate positive electrode material, especially the performance of the lithium manganate positive electrode material in a low-voltage range of 2.0-3.3 V, are improved through lithium enrichment, doping of a proper proportion of M elements and synergistic cooperation of 111 crystal face diffraction peak intensity of the lithium manganate positive electrode material, so that the energy density, the effective gram volume and the cycling stability of the battery are improved, and the battery performance is improved. The battery service life is prolonged.

This invention relates to the field of battery technology, specifically to a composite anode material, its preparation method, and its applications. A composite anode material includes a carbon material matrix and a coating layer disposed on the surface of the carbon material matrix. The coating layer contains amorphous carbon and a dual-conductor composite. The dual-conductor composite has a core-shell structure, with the core layer containing a carbon-based conductive agent and the shell layer containing a fast-ion conductor. The composite anode material of this invention, through the synergy of the various layers, can further improve the fast-charging performance of the anode material and enhance the battery's capacity and cycle performance.

This invention relates to the field of comprehensive utilization technology of iron and steel smelting resources, specifically to a method for the direct recycling and utilization of iron-rich red mud in converter steelmaking. The method includes the following steps: Step 1: Retaining slag, including MgO, in the converter for slag splashing and furnace protection; Step 2: Adding fine-grained limestone to the converter; Step 3: Adding iron-rich red mud to the converter, and shaking the converter 2-3 times after the mud has been added; Step 4: Verticalizing the converter and blowing nitrogen into it at least once using a top-blowing method, with each blowing lasting 3-5 seconds and an interval of 10 seconds between each blowing; Step 5: Adding scrap steel to the converter, waiting 0-5 minutes, then adding molten iron and starting the blowing process. This invention directly applies iron-rich red mud to the converter steelmaking process, achieving dephosphorization of molten iron with high phosphorus content without the use of flux.

This invention relates to the field of traditional Chinese medicine technology, specifically to a method for preparing concentrated Astragalus membranaceus pills and its application, including the following steps: (1) preparing a clear extract by alcohol extraction; (2) making pills by plastic molding; (3) drying the pills at a constant temperature. In the pill-making process, this invention selects 100-mesh Astragalus membranaceus mixed fine powder and adopts a mass ratio of clear extract to fine powder of 1:2. Since the 100-mesh powder has a uniform particle size and a moderate specific surface area, it can fully contact and bond with the clear extract, avoiding the problem of the pills being rough and cracked due to excessive particle size and the pills being too fine due to excessive moisture dissipation. The 1:2 ratio makes the soft material suitable for its softness and hardness, so that it will not be loose and difficult to form due to excessive powder ratio, nor will it cause adhesion and blockage of the mold due to excessive clear extract ratio. Combined with the gradient humidity soft material preparation technology, 60% purified water is added first and mixed evenly, and then the remaining water is added in two batches. Low-frequency vibration is applied simultaneously for mixing, which can make the internal humidity of the soft material uniform and the bonding force stable, thereby obtaining wet pills with smooth surface, round shape and no cracks.

The invention belongs to the field of material chemistry, and discloses a nitrogen-doped zinc-based adsorbent, a preparation method of the nitrogen-doped zinc-based adsorbent and application of the nitrogen-doped zinc-based adsorbent in radioactive cesium removal, and the preparation method of the nitrogen-doped zinc-based adsorbent comprises the following steps: step 1, preparing a ZIF-8 precursor with a dodecahedron structure; step 2, preparation of HNZOR or HNZSS: dispersing the ZIF-8 precursor obtained in the step 1 in a solvent, carrying out a low-temperature hydrothermal reaction at 150-200 DEG C, collecting a product after the reaction is completed, washing and carrying out vacuum drying to obtain HNZOR; the preparation method comprises the following steps: dispersing HNZOR in water, carrying out secondary low-temperature hydrothermal reaction in an ammonium hydroxide environment at 120-180 DEG C, collecting a product after the reaction is completed, washing and carrying out vacuum drying to obtain HNZSS; and 3, activating the HNZOR or HNZOR obtained in the step 2 by using potassium salt containing K < + >, and after activation is completed, washing and drying to obtain the nitrogen-doped zinc-based adsorbent. The adsorbent disclosed by the invention can be widely applied to removal and enrichment of Cs < + > in nuclear power plant wastewater, accident emergency water bodies and high-salt complex waste liquid.