4results about How to "Improve initial discharge capacity" patented technology

The invention relates to a cobalt-free ultra-high nickel positive electrode material and a preparation method and application thereof, the preparation method comprises the following steps: ball-milling and mixing a nickel source, a lithium source and a dopant to obtain powder, and drying and sintering the obtained powder to obtain the cobalt-free ultra-high nickel positive electrode material, the doping agent comprises an aluminum-containing doping agent and a manganese-containing doping agent; the nickel source, the lithium source and the doping agent are mixed according to the molar ratio of the nickel element to the lithium element to the total doping element being (0.90-0.98): (1.03-1.06): (0.02-0.10). The Al and Mn elements are uniformly doped in the positive electrode material substrate through a solid-phase reaction method, the material performance is synergistically improved by utilizing the unique action mechanism of the doped elements, the electrochemical performance is synergistically improved on the premise of not depending on the cobalt element, and high initial discharge capacity, cycling stability and rate capability are kept in a wide voltage interval; and excellent capacity retention capability is shown in a wide multiplying power range.

This application discloses a solid electrolyte precursor, a solid electrolyte, and a solid lithium battery, relating to the technical field of solid electrolytes; the solid electrolyte precursor is processed to form a solid electrolyte containing thiourea structural units, the thiourea structural units containing N-H groups capable of participating in hydrogen bonding; the solid electrolyte exhibits an ionic conductivity of not less than 1.6 × 10⁻⁶ at 25°C. ‑4 S·cm ‑1 This application describes a solid electrolyte formed from a solid electrolyte precursor. The solid electrolyte contains thiourea structural units and forms a polymer network structure with modified inorganic fillers as connecting points. This improves the interfacial compatibility between inorganic and organic materials in the solid electrolyte and forms a continuous conductive path in the solid electrolyte, thereby increasing the ionic conductivity of the solid electrolyte.

This invention relates to a method for preparing a composite PbO / ZnO three-dimensional porous lead-carbon battery additive, belonging to the field of lead-carbon battery technology. The invention involves pre-treating a titanium substrate by degreasing, followed by etching and activation in a nitric acid-hydrochloric acid mixture to obtain an activated titanium substrate. A three-dimensional hierarchical porous carbon, carbon black, and PVDF binder are mixed uniformly to obtain a mixture. N-pyrrolidone is added to the mixture, and the mixture is further mixed uniformly to obtain a three-dimensional hierarchical porous carbon slurry. The three-dimensional hierarchical porous carbon slurry is uniformly coated onto the surface of the activated titanium substrate and dried to obtain a carbon-based anode. Using a lead nitrate-zinc oxide mixed solution as the electroplating solution, the carbon-based anode is used as the anode, and a copper plate as the cathode. Electroplating is performed at 40–50°C with stirring for 1–2 hours. After electroplating, the anode is removed, washed with deionized water, and the electroplated layer is scraped off the titanium substrate surface and vacuum dried to obtain the composite PbO / ZnO three-dimensional porous lead-carbon battery additive. In this invention, PbO / ZnO is uniformly modified on the three-dimensional hierarchical porous carbon material, which, as a lead-carbon battery additive, can effectively inhibit the hydrogen evolution reaction.

This invention discloses a method for preparing a high-entropy sodium ferrous sulfate / carbon composite cathode material and its application in high-temperature sodium-ion batteries, belonging to the technical field of sodium-ion battery cathode materials. The general formula of the sodium ferrous sulfate / carbon composite cathode material is Na. 2.4‑ 2a Fe 1.8‑x+a M 2+ y N 3+ z (SO4)3 / C, where 2x = 2y + 3z, 0 ≤ a ≤ 0.2, 0 < x ≤ 0.2, 0.01 ≤ y ≤ 0.1, 0.01 ≤ z ≤ 0.1; M is selected from at least four of Mg, Ca, Mn, Co, Ni, Cu, Zn, and Ba, and N is selected from Al or Cr. This invention utilizes a high configurational entropy to suppress the dissolution of transition metals, structural collapse, and abnormal grain growth under high-temperature conditions, enabling the material to maintain structural integrity and performance stability during high-temperature cycling, thus possessing broad application prospects.