16results about How to "Improve air stability" patented technology

This invention relates to the field of battery technology, and more particularly to a positive electrode lithium replenisher, its preparation method, a positive electrode sheet, and a lithium battery. The aforementioned positive electrode lithium replenisher includes a core and a shell, with the shell covering the surface of the core to isolate the core from the side reaction environment. The core is a lithium-rich material, specifically at least one of Li5FeO4, Li5ReO6, and Li6CoO4. The shell is cobalt boride. This core-shell structured positive electrode lithium replenisher with cobalt boride as the shell effectively coats the core material, improves the air stability of the positive electrode lithium replenisher, reduces residual alkali, and thus enhances the battery's energy density and cycle performance.

The invention discloses an all-solid-state battery positive electrode material. The all-solid-state battery positive electrode material comprises a positive electrode active material and a composite sulfide solid electrolyte, the composite sulfide solid electrolyte comprises a sulfide solid electrolyte matrix and a metal fluoride layer coated on the surface of the sulfide solid electrolyte matrix, and the mass ratio of the positive active material to the composite sulfide solid electrolyte is 7: 3. The sulfide solid electrolyte is coated with a layer of metal fluoride, on one hand, the stable metal fluoride effectively isolates sulfide from being in direct contact with air, the air stability of the sulfide solid electrolyte is greatly improved, and the problem that the sulfide solid electrolyte is sensitive to air is relieved; on the other hand, the metal fluoride coating layer can prevent sulfide solid electrolyte from being in direct contact with the positive electrode material, the instability between the positive electrode material and the electrolyte is relieved, and an effective thought is provided for industrialization of the all-solid-state battery.

The application relates to the technical field of ceramics and energy storage, in particular to a Li-La-Zr three-site co-doped garnet solid electrolyte ceramic and a preparation method and application thereof, the chemical formula of the Li-La-Zr three-site co-doped garnet solid electrolyte ceramic is Li 6.25 (Ga 0.25 )La 2.5 (Sr 0.5 )Zr 1.5 (Ta 0.5 )O 12 The Li-La-Zr three-site co-doped garnet solid electrolyte ceramic provided by the application has high ionic conductivity and excellent air stability, and can improve the cycle stability and rate performance of a solid-state battery.

The application discloses a kind of miscellaneous anion oxyhalide solid electrolyte and preparation method, application and full solid battery thereof;Belong to solid battery technical field.The electrolyte material chemical formula is Li （3d+2e+2f+g） M m+ b N n+ c (PO4) d (SO4) e (CO3) f (OH) g X (mb+nc) , M is alkaline earth metal, N is one or more of transition metal, rare earth metal and P area metal, X is at least one of F, Cl, Br and I.The twisted Li-X sublattice structure formed by introducing halogen atom of the material of the application significantly reduces lithium ion migration barrier, expands lithium ion transport channel through special angle sharing oxygen network structure, also endows material with excellent mechanical flexibility, and the halogen-rich passivation layer spontaneously formed on the surface of the material makes it show excellent environmental stability;Not only solve the key material bottleneck of solid battery development, more provide solid technical support for promoting new energy industry to higher safety, higher energy density direction development.

This invention provides a core-shell structured sulfide electrolyte, its preparation method, and a solid-state battery. The core-shell structured sulfide electrolyte includes a sulfide solid electrolyte and a shell layer coating the surface of the sulfide solid electrolyte; the shell layer is composed of hydrophobic silica; wherein the hydrophobic silica is obtained by hydrophobic modification of silica with a modifier; the modifier includes a coupling agent for hydrophobic modification. This core-shell structured sulfide electrolyte exhibits higher air stability and chemical stability, which is beneficial for the application of sulfide electrolytes in solid-state batteries.

This invention discloses a composite solid electrolyte and its preparation method, relating to the field of battery technology. The preparation method of the composite solid electrolyte includes the following steps: mixing raw materials for preparing a sulfide solid electrolyte and bismuth iodide, then sintering at a preset temperature for a preset time to obtain a bismuth iodide-doped sulfide solid electrolyte; coating the surface of the bismuth iodide-doped sulfide solid electrolyte with barium titanate to obtain the composite solid electrolyte; the mass of bismuth iodide accounts for 3% to 8% of the total mass of the raw materials for preparing the sulfide solid electrolyte. This invention uses bismuth iodide to dope and modify the sulfide solid electrolyte, improving air stability while enhancing the coating performance of barium titanate and reducing the impact of barium titanate coating on the ionic conductivity of the sulfide solid electrolyte. Simultaneously, barium titanate coating can further improve air stability and mitigate bismuth iodide doping defects, i.e., preventing bismuth iodide from absorbing moisture and preventing iodide ions from being oxidized by air.

The invention discloses a two-dimensional material-based composite solid electrolyte with a vertical arrangement structure and a preparation method of the two-dimensional material-based composite solid electrolyte. The preparation method comprises the following steps: preparing a two-dimensional material film by adopting dispersion liquid of two-dimensional nanosheets; polymer-containing slurry is prepared from a polymer, a lithium salt and the two-dimensional nanosheet; alternately carrying out spin coating of the slurry containing the polymer and pasting of the two-dimensional material film for several times to obtain a block body in which the polymer-containing film and the two-dimensional material film are alternately arranged for several layers; and carrying out at least drying, cold pressing and slicing on the block to obtain the two-dimensional material-based composite solid electrolyte with the vertical arrangement structure. The composite solid electrolyte has the advantages of high ionic conductivity at room temperature, wide electrochemical stability window, excellent air stability, excellent performance in a wide temperature range and the like.

This invention proposes an all-solid-state lithium-ion battery and its application. The all-solid-state lithium-ion battery includes: a positive electrode; a modified lithium-based composite negative electrode, the modifying material including metal fluorides; and a solid electrolyte membrane disposed between the positive electrode and the modified lithium-based composite negative electrode, wherein the solid electrolyte membrane includes a sulfide electrolyte with the chemical formula Li. a P 1‑b M b S c O d X e , of which 5

This application belongs to the field of lithium-ion battery technology, and specifically discloses an air-stable solid electrolyte. The solid electrolyte includes a core and a hydrophobic layer coating the surface of the core. The core comprises sulfide particles, and the thickness of the hydrophobic layer is 5–30 nm. The solid electrolyte according to the embodiments of this application has a surface-coated hydrophobic layer with low surface activity, exhibiting strong air stability and enabling the fabrication of solid-state batteries with excellent battery performance.

This application discloses a cathode material, its preparation method, and an all-solid-state battery. It includes a substrate and a first coating layer and a second coating layer sequentially coated on the surface of the substrate. The substrate is a phosphorus-doped spinel-type lithium nickel manganese oxide. The first coating layer includes an oxygen-doped halide electrolyte. The second coating layer includes an Sb / O co-doped argentite-germanium sulfide. The cathode material provided by this application has the advantage of synergistically improved structural stability, interfacial stability, and air stability.

The invention relates to the field of solid electrolyte, in particular to a method and a device for improving air stability of sulfide solid electrolyte. The method comprises the following steps: placing a solid fluorinating agent in a first temperature zone reaction device, heating the solid fluorinating agent at a first temperature, and decomposing the solid fluorinating agent to generate HF-containing gas; and placing the sulfide solid electrolyte in a second temperature zone reaction device, vacuumizing the second temperature zone, introducing the HF-containing gas generated in the first temperature zone, and keeping the temperature for 1-3 hours at the second temperature. According to the method, a uniform and compact fluoride shell layer is generated in situ on the surface of the sulfide solid electrolyte through a gas-solid reaction, and a core-shell structure is formed. The shell layer can effectively prevent air from being in contact with a substrate, the air stability of the material is remarkably improved, the process is safe, toxic gas residues are avoided, raw materials are cheap and easy to obtain, and the shell layer is suitable for large-scale production.

The present application relates to thermoelectric material technical field, especially to a kind of method for improving the air stability of n-type single-wall carbon nanotube thermoelectric film.The method provided by the present application comprises the following steps: polyvinylpyrrolidone, polyvinylidene fluoride and dimethylformamide are mixed to obtain antioxidant slurry;The n-type carbon nanotube film is coated with the antioxidant slurry to obtain the n-type carbon nanotube film coated with antioxidant layer;After connecting two wires at the two ends of the n-type carbon nanotube film coated with antioxidant layer, super-hydrophobic coating is carried out to obtain n-type single-wall carbon nanotube film with super-hydrophobic and antioxidant properties.The n-type single-wall carbon nanotube film treated by the method can exist stably in a high humidity atmosphere, and has good flexibility, and is expected to be prepared into a flexible thermoelectric device for human wear with existing p-type thermoelectric film.

The application relates to a pre-lithiation reagent and a preparation method, a lithium ion battery negative electrode and a preparation method, and a lithium ion battery, and belongs to the technical field of lithium ion batteries, and comprises the following steps: dispersing a lithium-silicon alloy, ammonium hexafluorozirconate and a hydrophobic polymer in a non-polar solvent, and performing in-situ reaction at 60-180 DEG C; then performing vacuum filtration on the system after reaction; and drying the solid-phase product obtained through the vacuum filtration to obtain the pre-lithiation reagent. The pre-lithiation reagent prepared by the application realizes fiberization of a main binder under stirring together with an active substance, a conductive agent and a double-binder system, and a high-load self-supporting thin film material prepared through dry rolling is used as a negative electrode sheet, precise and uniform compensation of active lithium is realized under the condition of no organic solvent, the prepared negative electrode sheet has excellent chemical stability in a room-temperature high-humidity environment, and has an outstanding industrial application prospect.

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.

The invention belongs to the technical field of potassium ion batteries, and particularly relates to a medium-entropy potassium ion battery positive electrode material with high air stability, a preparation method of the medium-entropy potassium ion battery positive electrode material and a potassium ion battery, the medium-entropy potassium ion battery positive electrode material is a ferromanganese-based layered oxide, the chemical general formula of the medium-entropy potassium ion battery positive electrode material is KxMnyFezM1-y-zO2, x is larger than or equal to 0.45 and smaller than or equal to 0.8, and y + z is larger than or equal to 0.7 and smaller than or equal to 0.85; and M is a combination of six or more doping elements of Al, Sn, Mg, Cu, Ni, Co, Sb, Cr, V, Ti and Zn. The potassium ion battery positive electrode material provided by the invention is low in production cost and simple in preparation process, can effectively inhibit structural degradation generated after the reaction with air components, can maintain the stability of a crystal structure after being exposed in a high-humidity air environment for a long time, and can be applied to the field of lithium ion batteries. And the initial discharge specific capacity and the cycle stability of the battery are maintained.