2results about How to "The post-processing process is simple" patented technology

The application discloses a sodium ion battery positive electrode material and a preparation method thereof. By adding cheap, non-toxic, environment-friendly and easily-degradable water-soluble cellulose as an additive, the growth of a specific crystal direction can be inhibited. The hydrophilic group of the water-soluble cellulose can change the coordination environment of metal ions and reduce the entry of water molecules into the crystal lattice. In addition, by introducing the water-soluble cellulose, high-concentration reactant feeding can be realized, which is beneficial to reducing the consumption of industrial water. Meanwhile, compared with other existing additives, the water-soluble cellulose is environment-friendly, easily-degradable, low in production and separation cost, and free of toxic by-product generation. The prepared open three-face cubic Fe-based Prussian blue analogue material is good in dispersity, high in purity and uniform in morphology, and as a sodium ion battery positive electrode material, has a reversible capacity of 155.40 mAhg ‑1 at 0.1C (1C=170 mAhg ‑1 ) and a first discharge coulombic efficiency of 97.83%.

This invention belongs to the field of polyolefin recycling technology and relates to a method for preparing high-quality carbon nanotubes by catalytic carbonization of polyolefins. In this invention, polyolefins are degraded at high temperature to generate small-molecule hydrocarbons. Subsequently, a Ni-Mo-Al catalyst undergoes a reduction reaction to generate elemental nickel. The elemental nickel catalyzes the degradation products to undergo dehydrogenation, cyclization, and aromatization reactions, followed by carbon deposition on the surface of the elemental nickel, which gradually grows into carbon nanotubes. Furthermore, the Ni-Mo-Al catalyst can reduce the formation of amorphous carbon, thereby increasing the activity of elemental nickel and reducing its ability to dissolve carbon, thus preparing carbon nanotubes with smaller diameters and uniform morphology. This invention has the advantages of inexpensive and readily available carbon sources and a simple preparation method, realizing the upgraded chemical recycling of waste polyolefins and the controllable preparation of carbon nanotubes, effectively solving the problem of reusing urban and industrial waste polyolefins.