4results about How to "Aid in diffusion" patented technology

The application relates to the technical field of lithium ion batteries, and specifically provides a preparation method of lithium iron phosphate, lithium iron phosphate, a positive electrode sheet and a lithium ion battery. The preparation method of the lithium iron phosphate provided by the application comprises the following steps: providing Ti-MOF / polymer composite nanofibers; mixing the Ti-MOF / polymer composite nanofibers with a lithium source and a phosphorus-iron source to obtain a precursor mixture; and sintering the precursor mixture under an inert atmosphere. The method provided by the application not only avoids a large amount of loss and dust pollution caused by directly using nanometer powder, but also retains the characteristics of a large specific surface area and high activity of the nanofiber, which is helpful to diffusion into the crystal interior at a low sintering temperature and improvement of the ion conductivity of LFP; the carbonized fiber skeleton after calcination can construct a conductive network, further improving the electronic conductivity of LFP, and being helpful to reduction of the use of a conductive agent in the positive electrode sheet.

The invention relates to the field of catalysts and the field of high polymer material recycling, and discloses a porous cracking catalyst, a preparation method thereof and application of the porous cracking catalyst in a reaction for preparing low-carbon olefin from waste plastics. The porous cracking catalyst comprises an SAPO-18 molecular sieve, super-macroporous silica gel and a modified oxide, and on the basis of the total weight of the porous cracking catalyst, the SAPO-18 molecular sieve accounts for 28-60 wt%, the super-macroporous silica gel accounts for 30-70 wt%, and the modified oxide accounts for 2-10 wt%; the specific surface area of the porous cracking catalyst is 380-450 m < 2 > / g, the pore volume is 0.68-1.05 mL / g, the pore size distribution is three-peak distribution, and the most probable pore sizes corresponding to the three peaks are 0.38-0.45 nm, 2-4.5 nm and 15-45 nm respectively. The porous cracking catalyst is applied to waste plastics, so that the problem of waste plastic recovery is solved, and the yield of important chemical raw material low-carbon olefin is increased.

The invention relates to the field of antibacterial porous films, in particular to an antibacterial porous film and a preparation method thereof. The antibacterial porous film is characterized in that the antibacterial porous film comprises a film carrier and a porous nano coating layer coating the surface of the film carrier, and the porous nano coating layer comprises ZIF nanocrystals of a porous structure. The ZIF nanocrystal with the porous structure is used as a main material of the coating structure, and the ZIF material constructs a porous layer on the surface of the film carrier, so that the antibacterial property of the film can be effectively improved. The structure not only increases the surface area of the film and is beneficial to contact with microorganisms, but also contributes to diffusion of substances by virtue of the porous structure, so that the antibacterial effect is further enhanced.

The invention discloses a heat treatment auxiliary tool and a heat treatment method for a cylindrical forge piece with a deep blind hole. The heat treatment auxiliary tool comprises a deep U-shaped lifting appliance and a directional water spraying device fixedly connected with the deep U-shaped lifting appliance. A flow guide cover is arranged at the tail end of the directional water spraying device; a flow guide cover is arranged at the tail end of the directional water spraying device; the flow guide cover is of a hollow structure and internally provided with a hollow cavity. The flow guide cover is further provided with a water inlet end and a water outlet end which are oppositely arranged. The hollow cavity is communicated with a water flow passage of the directional water spraying device through a water inlet end; and the outer surface of the water outlet end is conformal with the inner molded surface of the cylindrical forge piece. Water flow in the hollow cavity flows out through the outer surface of the water outlet end, conformal water spraying is achieved in the direction perpendicular to the arc-shaped curved surface, turbulence of a flow field in the barrel forge piece is avoided, and the defects that an existing deep blind hole barrel forge piece is prone to deformation in heat treatment, difficult to hoist and uneven in cooling are overcome.