4results about How to "Improve long-cycle performance" patented technology

The application discloses a sodium ion battery positive electrode material and a preparation method thereof. By adding cheap, non-toxic, environment-friendly and easily-degradable water-soluble cellulose as an additive, the growth of a specific crystal direction can be inhibited. The hydrophilic group of the water-soluble cellulose can change the coordination environment of metal ions and reduce the entry of water molecules into the crystal lattice. In addition, by introducing the water-soluble cellulose, high-concentration reactant feeding can be realized, which is beneficial to reducing the consumption of industrial water. Meanwhile, compared with other existing additives, the water-soluble cellulose is environment-friendly, easily-degradable, low in production and separation cost, and free of toxic by-product generation. The prepared open three-face cubic Fe-based Prussian blue analogue material is good in dispersity, high in purity and uniform in morphology, and as a sodium ion battery positive electrode material, has a reversible capacity of 155.40 mAhg ‑1 at 0.1C (1C=170 mAhg ‑1 ) and a first discharge coulombic efficiency of 97.83%.

This disclosure provides a lithium-ion battery and its preparation method. Specifically, the positive electrode film layer includes a positive electrode active material, a solid electrolyte, a conductive agent, and a binder; the average fiber orientation angle of the positive electrode film layer is 40°~50°. The solid electrolyte layer includes a solid electrolyte and a binder; the average fiber orientation angle of the solid electrolyte layer is 40°~50°. By using a positive electrode film layer or a solid electrolyte layer with an average fiber orientation angle of 40°~50°, the electrochemical interface stability is improved, thereby enhancing the long-cycle performance and rate performance of the lithium-ion battery.

This invention discloses an oil-based binder, anode slurry, a composite silicon anode, and an all-solid-state battery, belonging to the technical field of all-solid-state battery energy storage materials. The oil-based binder comprises component A and component B; component A is a copolymer composed of acrylate, long-chain ether oxygen bonds, and epoxy active groups, while component B is a styrene-ethylene-butene-styrene block copolymer. This binder is prepared through free radical polymerization and physical blending, is soluble in weakly polar solvents, and is suitable for composite silicon anode systems based on sulfide solid electrolytes. The binder provided by this invention possesses excellent ion conduction ability, mechanical properties, and interfacial adhesion, effectively buffering the volume expansion of the silicon anode, maintaining electrode structural stability and interfacial ion transport, thereby significantly improving the rate performance and long-cycle stability of the all-solid-state battery.

The application relates to a halide solid-state electrolyte as well as a preparation method and application thereof, and relates to the technical field of new energy materials. 1.5 Zr 0.5 M 0.5 Cl5O 0.5 , wherein M is Ta or Nb; and the inner core is a crystalline halide electrolyte with a chemical general formula of Li 2.5 Y 0.5 Zr 0.5 Cl 6‑4x F 4x , wherein 0.05<=x<=1.45. The halide solid-state electrolyte has high ion conductivity, high oxidation potential, high mechanical performance, good chemical stability with sulfides and high air stability.