4results about How to "Improved kinetics" patented technology

This invention discloses a sulfur-containing cathode material and its preparation method, belonging to the field of lithium-sulfur battery technology. The method uses a quaternary ammonium polymer containing nitrate as a cathode binder, dispersed with a conductive agent and a sulfur-containing cathode material in deionized water to obtain a cathode slurry. The slurry is then coated onto aluminum foil and vacuum dried to obtain a cathode sheet. The quaternary ammonium cation backbone in the binder can adsorb polysulfides, improving lithium-ion migration capacity, while simultaneously preventing the rapid and uncontrollable consumption of nitrate, thereby extending the lifespan of the lithium-sulfur battery.

The invention provides an antibacterial surface segregation covalent organic framework as well as a preparation method and application thereof, and relates to the field of separation membrane materials. The organic framework material disclosed by the invention is prepared by taking a covalent organic framework nanosheet with an internal antibacterial function as a segregation agent, physically blending the covalent organic framework nanosheet with a polymer matrix and utilizing a non-solvent induced phase separation process. The method comprises the following steps: firstly, synthesizing a covalent organic framework nanosheet dispersion liquid through a single-phase method, then blending the covalent organic framework nanosheet dispersion liquid with a high polymer material to prepare a membrane casting liquid, and finally, constructing a compact functional skin layer on the surface of the membrane and in pore channels through a non-solvent phase inversion process by utilizing the spontaneous surface segregation effect of covalent organic framework nanosheets in a phase separation process. The prepared membrane is of a typical asymmetric structure, and the antibacterial rate of the membrane on escherichia coli is high; the developed finger-shaped pore structure endows the membrane with high flux characteristic. The method effectively solves the problem of membrane biological pollution in the field of water treatment, and has the synergistic advantages of high flux, high interception and efficient antibiosis.

The application relates to a composite positive electrode material, a preparation method and a full-solid-state lithium selenium battery, which comprises the following steps: under the condition that the ball milling speed is 300 rpm-700 rpm and the ball milling time is 15 h-25 h, raw materials are subjected to ball milling treatment, so that the raw materials react in situ to generate an interface layer, and a composite positive electrode material is obtained; the raw materials comprise a positive electrode active substance, a Se-containing argyrodite solid-state electrolyte and a conductive agent; the positive electrode active substance comprises at least one of Se single substance and porous carbon loaded Se single substance, and the interface layer comprises a LiPSe compound. The application can solve the problems of poor interface stability and insufficient ion and electron conduction performance caused by solid-solid interface contact in the positive electrode material in the related art, and improves the energy density, rate, cycle life and other performances of the battery.