3results about How to "Shorten the migration path" patented technology

This invention relates to a method for preparing a vanadium selenide / vanadium oxide heterojunction photo-assisted zinc-ion battery, belonging to the technical field of vanadium selenide / vanadium oxide heterojunction photo-assisted electrochemical energy storage and zinc-ion battery. The method includes the following steps: mixing a selenium source solution and a vanadium source solution to obtain a reaction precursor solution; subjecting the reaction precursor solution to a hydrothermal reaction and washing to obtain vanadium selenide material; annealing the vanadium selenide material to form a vanadium oxide layer on its surface, obtaining a vanadium selenide / vanadium oxide heterojunction composite material; mixing the vanadium selenide / vanadium oxide heterojunction composite material, a conductive agent, and a binder, adding a solvent to prepare a slurry, coating the slurry onto the surface of a current collector, and drying to obtain a photocathode. The material and its application system described in this invention exhibit good specific capacity, rate performance, and cycle stability, and demonstrate good energy storage performance under illumination conditions; this invention is beneficial for further reducing electrode polarization and promoting the synergistic enhancement of electron transport and zinc-ion storage.

The present application discloses a supported bimetallic-based two-dimensional nanocatalytic material, a preparation method thereof, and an application thereof, which relate to the technical field of catalysts. The preparation method includes: preparing a plasma nanosheet with a single-layer structure or a few-layer structure; dispersing the plasma nanosheet in a solvent and adding a copper source to prepare a first mixed solution; subjecting the first mixed solution to stirring treatment in an inert gas environment, and successively performing freeze-drying treatment and calcination treatment in a hydrogen atmosphere to prepare a nanosheet-Cu; successively adding HAuCl4 and HCl to the nanosheet-Cu, mixing and reacting under a preset light condition to prepare a supported bimetallic-based two-dimensional nanocatalytic material, namely, a nanosheet-Cu-Au. The present application can achieve the functional division and spatial synergy of bimetallic active sites, and promote the efficient generation, separation, and directional transport of photo-generated carriers, thereby improving the reaction efficiency and product selectivity of the co-reduction of nitrate and carbon dioxide to urea.

This invention discloses a chemically resistant insulating paper, relating to the field of insulating materials technology. The chemically resistant insulating paper includes an outer layer, with an inner intermediate layer; the intermediate layer is bonded to the inner layer. This invention, combining a multi-layered composite structure with a unique fiber interweaving and porous structure, effectively blocks the penetration of chemical substances. The outer PTFE coating provides the first line of protection, the dense structure and chemically stable materials of the intermediate layer further block the penetration, and the modified fibers of the inner layer also possess a certain degree of corrosion resistance. Testing showed that after immersion in a 10% hydrochloric acid solution for 1000 hours, the insulating paper's performance did not significantly decrease. Each layer of material itself possesses excellent insulation properties, and the structural design optimizes the internal electric field distribution. The aramid fiber and nano-silica composite structure of the intermediate layer, and the modified cellulose and PPS fiber interweaving structure of the inner layer, reduce electron migration paths and improve insulation resistance, reaching over 10^15 Ω·cm.