3results about How to "Composite structure is stable" patented technology

The application discloses an in-situ growth MOG carbon nanofiber catalyst and a preparation method and application thereof, and comprises the following steps: stirring and mixing a nanofiber polymer and a solvent to obtain a uniform spinning liquid; performing electrostatic spinning to obtain a nanofiber membrane; adding a metal salt, a nitrogen-containing compound and resorcinol into water, slowly adding formaldehyde into the mixed solution to obtain an in-situ growth solution of a metal organic gel MOG; placing the nanofiber membrane into the in-situ growth solution to adjust a pH value, and performing in-situ growth by heating to obtain a MOG nanofiber membrane material; and performing high-temperature pyrolysis of the MOG nanofiber membrane material and urea in an inert atmosphere to dope nitrogen, thereby obtaining the MOG-CNF catalyst. The catalyst can effectively reduce overpotential of ORR and OER reactions, improve catalytic stability, and present stable and excellent dual-function electrocatalytic performance. Through a nano structure and a synergistic catalytic effect, the catalyst has a wide application prospect in the field of fuel cell energy storage and conversion.

This invention relates to the technical field of solid waste resource utilization and environmental pollution control, and particularly to a method for co-preparing a biochar-steel slag composite adsorbent using steel slag and biomass. First, the raw steel slag is pretreated by coarse grinding, then mechanically activated and modified by high-energy ball milling to obtain finely ground steel slag powder. Next, the finely ground steel slag powder is mixed with a sodium bicarbonate solution and subjected to ultrasonic treatment in a water bath. Then, biochar bran is added in a specific ratio, and further ultrasonic treatment is performed for chemical composite modification. Finally, after solid-liquid separation, washing, and drying, a biochar-steel slag composite structure adsorbent is obtained. This invention, through a combined mechanical and chemical technique, significantly increases the specific surface area of ​​the material, exposes the internal active components, constructs a composite structure, and enriches the surface active functional groups, exhibiting excellent adsorption performance and rapid adsorption kinetics for heavy metal ions in wastewater.

This invention relates to the field of lithium battery technology, and more particularly to a silicon-carbon composite material based on vertical graphene, its preparation method, and a lithium-ion battery. The silicon-carbon composite material comprises, from the inside out, a nano-silicon core, metal nanoclusters, vertical graphene, and a carbon-coated outer layer; the metal is selected from at least one of Pt and Pd. In this invention, firstly, a carbon-coated outer layer covering the entire surface isolates the nano-silicon core from the electrolyte; secondly, vertical graphene is introduced between the carbon-coated outer layer and the nano-silicon core to enhance the material's conductivity and mechanical properties, ensuring that the connection between the silicon particles and the carbon layer remains intact during expansion and contraction; finally, metal nanoclusters are introduced as a "bridge" to achieve a strong chemical / electrical connection between silicon and vertical graphene. This structural design alleviates the volume expansion problem of silicon-based materials during charge and discharge, improving the initial charge-discharge efficiency and long-cycle performance.