41results about How to "High ion transfer number" patented technology

The invention discloses a biomass nanofiber membrane, its preparation method and application. The biomass nanofiber membrane includes a biomass nanofiber film layer with a dense structure, which is made of biomass nanofibers chemically modified with cyano groups. become. In the present invention, due to the modification of the cyano group, the surface of the biomass nanofiber membrane can combine with the liquid electrolyte to form a gel state, through which lithium ions can be transported, so that the transmission of lithium ions does not depend on the strength of the membrane. aperture. The biomass nanofiber separator provided by the invention has good compactness, high ion conductivity, good electrolyte wettability and high ion transfer number. The present invention avoids the complicated steps that the biomass nanofiber separator needs to achieve high porosity by forming pores to improve the lithium ion conductivity of the separator. The biomass nanofiber separator provided by the application has good mechanical properties and realizes a dense bio The material nanofiber separator also has a breakthrough in excellent electrochemical performance.

The invention relates to a solid electrolyte, a preparation method thereof and a lithium secondary solid state battery, belonging to the technical field of secondary batteries. The technical problem solved by the invention is to provide a low-cost solid electrolyte. The solid electrolyte includes a polymer substrate, a lithium salt and an additive, wherein the additive is Ta-doped β-LiAlSi 2 o 6 . The use of new inorganic solid electrolyte additives improves the ionic conductivity of the solid electrolyte, and at the same time inhibits the growth of lithium dendrites, increases the energy density of the battery, and ultimately improves the cycle and rate performance of the battery. The solid electrolyte also has excellent ionic conductivity, high ion transfer number, and good cycle performance and rate performance at room temperature. Moreover, the preparation process is simple, the solid electrolyte slurry can be well mixed in a short time, the production efficiency is high, and the production cost is low.

The invention belongs to the technical field of electrolytes for alkali metal batteries, and specifically discloses a two-dimensional nanostructure electrolyte additive, a preparation method and an application. The two-dimensional nanostructure electrolyte additive is a two-dimensional structure organic or inorganic nanosheet, and the two-dimensional nanostructure material is boron nitride nanosheet, graphene oxide, transition metal sulfide nanosheet, two-dimensional metal organic framework material, One or more of two-dimensional covalent organic framework materials, the thickness of which is not greater than 10 nanometers. The method includes peeling organic or inorganic bulk materials into two-dimensional nanosheets with a thickness of less than 10 nanometers, adding them into deionized water to disperse evenly, and freeze-drying to obtain a two-dimensional nanostructure electrolyte additive. The electrolyte includes electrolyte salt, non-aqueous organic solvent, and the above-mentioned two-dimensional nanostructure electrolyte additive. The invention can improve the long-term cycle stability and safety of the battery.