2results about How to "Improve structural properties" patented technology

The application discloses a nitrogen-doped carbon-coated three-metal catalyst and a preparation method and application thereof, and belongs to the field of catalyst preparation and application. The method adopts sucrose, melamine and metal salt as low-cost raw materials, and forms an alkaline environment with the assistance of sodium hydroxide. In the environment, melamine is hydrolyzed into cyanuric acid, which is complexed with sucrose metal ions to form a stable supramolecular aggregate precursor containing metal, and then realizes effective encapsulation of the metal in a high-temperature pyrolysis process. The synergistic effect of the three metal elements Co, Ni and Zn significantly improves the performance of the catalyst, so that CoNiZnO@NC-600 not only exhibits high conversion rate (98.4%) and selectivity (99%) in the reaction of hydrogenation conversion of furfural to furfuryl alcohol, but also has excellent cycle stability, thereby providing a new efficient method for the hydrogenation conversion of biomass-derived compounds.

The application discloses a battery and a power utilization device, and belongs to the technical field of batteries. The battery comprises a negative electrode sheet, the negative electrode sheet comprises a negative electrode current collector and a negative electrode material layer arranged on the surface of the negative electrode current collector; the negative electrode material layer comprises a negative electrode active material, the negative electrode active material comprises graphite, the graphite comprises primary graphite particles and secondary graphite particles; the unit of a crystal size La of the graphite is nm; the volume ratio of the secondary graphite particles in the graphite is a, the unit is %, and the D n50 of the secondary graphite particles is b, the unit is μm; La, a and b satisfy the relationship: 500≤La×a×b≤2600. By adjusting the specific synergistic relationship among the crystal size La of the negative electrode active material graphite, the secondary graphite particle size and the proportion of the secondary graphite particles, the battery can slow down the consumption rate of the film-forming additive and improve the cycle life of the battery on the basis of good cycle performance and kinetics.