7results 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.

This invention discloses a method for extracting fish oil from tuna by-products, a partitioned supercritical fluid extraction (SCFE) device, and the resulting fish oil. The method includes: washing and crushing the by-products into 0.5-5 mm pieces; drying them at 30-40°C under a nitrogen-fluidized atmosphere with an oxygen content below 50 ppm until the moisture content is below 5%; and then processing them using a partitioned supercritical fluid extraction (SCFE) device at 35-40°C and 40-80 MPa. The device is divided into an extraction section and a separation section from bottom to top. The first to fifth layers are extraction trays, and the sixth to Nth layers are separation trays, where N is 12-30. The solid feed inlet is located between the two sections. Supercritical CO2 rises from the bottom of the column. The material descends layer by layer through the extraction section and is discharged from the bottom. Oil-rich CO2 rises, undergoes pre-separation in the separation section, and is then subjected to two-stage pressure reduction separation and filtration to obtain fish oil. This invention allows for continuous and stable operation under high pressure, with uniform mass transfer, resulting in fish oil with low oxidation and high quality.

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.

The application discloses a TiO2-ZnIn2S4 core-shell structure S-type heterojunction photocatalyst and a preparation method and application thereof, and relates to the field of photocatalytic materials. The TiO2-ZnIn2S4 core-shell structure S-type heterojunction photocatalyst comprises a TiO2 inner core, and a ZnIn2S4 outer shell coated outside the TiO2 inner core; the ZnIn2S4 outer shell is formed by in-situ growth of ZnIn2S4 nanosheets on the surface of the TiO2 inner core to form a three-dimensional hierarchical nanoflower structure; wherein, an S-type heterojunction is formed between the TiO2 and the ZnIn2S4. The photocatalyst realizes efficient spatial separation of photo-generated carriers through a close heterojunction interface of the core-shell structure, and meanwhile, the S-type heterojunction retains the carriers with strong oxidation-reduction capacity, so that the performance of water decomposition for hydrogen production by photocatalysis and the cycle stability are improved.

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.

The invention relates to the technical field of MOS (Metal Oxide Semiconductor) semiconductors, and discloses a voltage-withstanding MOSFET (Metal Oxide Semiconductor Field Effect Transistor) device for high-load shutdown of a robot dog and a preparation method thereof, the voltage-withstanding MOSFET device comprises a plurality of parallel MOS cells, and each MOS cell comprises a drain electrode, a semiconductor epitaxial layer, a source electrode and a grid electrode; the semiconductor epitaxial layer comprises an N substrate layer, an N drift layer, a P + layer, an N well layer and a P well layer, and a lightly doped N layer is arranged in the middle of the N drift layer of each MOS cell; laterally symmetrical L-type P-layers with inclined tops and arc-shaped opposite side tops are introduced to the two sides of an N drift layer, and in cooperation with the middle buffering effect of a lightly doped N layer, local electric field concentration at the edge of the N drift layer in a traditional device can be accurately dispersed; the arc-shaped and L-shaped contours defined by the photoetching process can effectively guide the electric field to be uniformly distributed, so that the breakdown risk caused by too strong local electric field is avoided.

The utility model discloses an electrochromic mobile phone back cover, including first substrate layer, first electrode layer, electrochromic layer, electrolyte layer, ion storage layer, second electrode layer and second substrate layer that set gradually in layers, at least one in electrochromic layer and ion storage layer is equipped with grid shape protuberant microstructure on the side surface of electrolyte layer, grid shape protuberant microstructure is embedded to electrolyte layer. This electrochromic mobile phone back cover has lower energy consumption, faster color change response speed and deeper color change effect.