3results about How to "Low alkali content" patented technology

Provided is a method for preparing a layered positive electrode material, comprising the following steps: (1) mixing layered nickel cobalt manganese hydroxide with a lithium source, carrying out primary sintering in an oxygen atmosphere, pulverizing and sieving to obtain a primary sintering product; and (2) carrying out secondary sintering on the primary sintering product in a sulfur dioxide atmosphere to obtain a layered positive electrode material, of which the chemical formula is NiaCobMnc(OH)2, wherein 0.3≤a≤0.95, 0.03≤b≤0.12, 0.01≤c≤0.10, and a+b+c=1. Also provided are a layered positive electrode material obtained by the preparation method and a lithium-ion battery comprising the layered positive electrode material. In the preparation method, the secondary sintering is carried out in a sulfur dioxide atmosphere to cause the sulfur dioxide and the primary sintering product to be in full contact with each other and reacted, the sulfur dioxide reacts with residual alkali on the surface of the positive electrode material to produce lithium sulfate, thereby achieving the objective of reducing the surface residual alkali and pH value and improving electrochemical performance of the material.

The utility model relates to the technical field of separator, concretely relates to a vertical gas-liquid separator, including jar body, still include: the air intake subassembly through jar body one side, the air intake subassembly includes the air intake pipe setting on jar body, the end portion at jar body inside of air intake pipe rotates and is installed with gas distributor, and the gas distributor is the porous tangential fish scale board type structure, and the gas distributor is located above the liquid level in jar body, when the gas-liquid mixed fluid enters into the gas distributor from the air intake pipe, makes the entering gas-liquid mixed fluid even dispersion through the porous tangential fish scale board type structure, increases the contact area with the separation space, simultaneously with the help of the porous tangential fish scale hole structure, makes the gas distributor can rotate, and the alkali foam on the electrolyte surface can be removed through the rotating gas distributor. The utility model can remove the alkali foam on the electrolyte surface through the rotating gas distributor, more effectively carries out the gas-liquid separation, and improves the gas-liquid separation effect.

The invention relates to a preparation method of a functional concrete admixture with high impermeability and crack resistance. According to the technical scheme, a proper amount of deionized water and a prepared GO-PCs solution are sequentially added into a reaction container, stirring is started, then a certain amount of organic silicon modified acrylic emulsion, vinyl acetate-acrylic emulsion, polyvinyl alcohol, sodium gluconate, glycerol, xanthan gum and a defoaming agent are sequentially added, and the time interval of adding each raw material is 2 minutes; after all the materials are added, continuously stirring for 30 minutes, and then adding the air entraining agent; and continuously stirring for 5 minutes to finish the preparation of the product. The anti-permeability concrete has the beneficial effects that the anti-permeability performance of the concrete is greatly improved from traditional P6-P12 to P20 or above, and the limit anti-permeability performance can exceed P40; product application is simple, material putting is simpler and more convenient, and production and construction are more facilitated; compared with a traditional product, the construction performance, the mechanical performance and the durability of the concrete are all improved to different degrees, and the anti-cracking capacity is obviously improved.