2results about How to "Considerable reversible capacity" patented technology

The application relates to a one-step method for preparing metal sulfide ultrathin nanosheets and application, which comprises the following steps: step one: uniformly mixing a metal salt, a salt template agent and thiourea in ethanol to obtain a precursor mixed liquid; step two: performing heating and drying on the precursor mixed liquid to obtain a precursor powder; step three: performing heat treatment on the dried precursor powder; and step four: soaking the heat-treated precursor powder in deionized water, and then performing cleaning and drying to obtain a metal powder, namely the metal sulfide ultrathin nanosheet. The method for preparing the metal sulfide ultrathin nanosheet provided by the application does not need to additionally introduce a sulfur source, is simple and easy to operate, has low cost, and the obtained metal sulfide two-dimensional ultrathin nanosheet has uniform morphology, can provide a larger specific surface area, abundant energy storage sites and a shorter diffusion distance, and has great application prospects in the field of alkali metal ion batteries-potassium ion batteries.

This invention discloses a lithium-rich manganese-based layered oxide composite cathode material and its preparation method, belonging to the field of lithium-ion battery technology. The method includes: adding water to a nickel source, a cobalt source, and a manganese source to obtain a mixed solution; adding sodium carbonate solution to adjust the pH; washing with deionized water and centrifuging; drying; mixing with lithium salt; and pre-calcining to obtain Li. 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 1.8 F 0.2 The material was then subjected to a process involving the sequential addition of a carbon source and an organic solvent. The resulting mixture was heated under a mixed atmosphere to obtain a lithium-rich manganese-based basal oxide material. Na₂WO₄ and pyrrole were then added, and the mixture was dissolved in deionized water to obtain a composite cathode material, Li. 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 1.8 F 0.2 @N,S-C@Na2WO4@PPy. The composite cathode material of this invention has uniform particles, stable structure, and exhibits considerable wide potential window reversible capacity, excellent rate performance, and stable cycle life.