11results about How to "Reduce vacancy" patented technology

The invention belongs to the technical field of electrode materials, and particularly relates to an electrode foil, a preparation method thereof and an aluminum electrolytic capacitor, and the preparation method of the electrode foil comprises the steps: carrying out the formation of a corrosion foil, and forming an aluminum oxide film on the surface of the corrosion foil; forming a nano-porous silicon dioxide film on the surface of the aluminum oxide film to obtain an electrode foil with an aluminum oxide-silicon dioxide double-layer composite oxide film; and sequentially carrying out phosphating treatment and annealing treatment on the electrode foil. According to the preparation method, after the corrosion foil is subjected to formation treatment to form the Al2O3 film, the nano-porous SiO2 film is formed on the surface of the Al2O3 film, the SiO2 film is subjected to phosphating treatment to contain phosphorus elements, the phosphorus elements are uniformly diffused into the SiO2 film, a double-layer composite oxidation film with the Al2O3 inner layer and the SiO2 outer layer is obtained, and the specific volume, the hydration resistance and the corrosion resistance of the low-voltage electrode foil are improved.

This application provides a charging service reservation and scheduling method and related equipment based on a three-dimensional dynamic weighted scoring system, belonging to the field of new energy vehicle charging scheduling and energy management technology. The application includes: calculating a three-dimensional index score; the three-dimensional index score includes a user credit score, a demand urgency score, and an economic value score; dynamically configuring weights based on the charging station's operational status data to obtain three-dimensional weight information; the three-dimensional weight information includes user credit weight, demand urgency weight, and economic value weight; weighting and fusing the three-dimensional index scores based on the three-dimensional weight information to obtain a three-dimensional dynamic weighted score; sorting the three-dimensional dynamic weighted scores of all charging request users, and executing charging resource scheduling decisions based on the sorting results. This application can pre-process complex calculations into a parallel scoring system, simplifying the final decision into an efficient weighted summation and sorting, reducing charging pile vacancy and improving resource utilization efficiency.

This application provides a cathode material precursor and its preparation method, a cathode material, and a lithium-ion battery, relating to the field of new energy technology. The cathode material precursor is a secondary particle composed of primary particles, forming a composite structure. It includes an inner layer arranged radially along the center of the cathode material precursor and an outer layer composed of sheet-like primary particles stacked flat and enclosing the inner layer. The outer layer's sheets are perpendicular to the pressure direction during compaction, resulting in a secondary particle mechanical strength higher than that of common radial or block-shaped secondary particles. After inheriting this structure, the cathode material can achieve a higher compaction density than common secondary particle products, significantly improving the material's energy density. The secondary particles in this application have different sheet orientations between their inner and outer layers. The sintered cathode material inherits this characteristic structure, resulting in different expansion and contraction directions during charge-discharge cycles. This avoids or reduces the formation of cracks that could cause particle structure collapse, thereby improving cycle performance.

The application relates to the technical field of perovskite materials, and discloses a kind of high-efficiency doped perovskite photoelectric conversion materials and preparation method thereof.The preparation raw materials of the perovskite photoelectric conversion material of the application include modified dopant, perovskite precursor solution and anti-solvent;The modified dopant of the application can inhibit the oxidation of Sn 2+ , reduce Sn vacancies and defects by introducing quinoline, thiocyanate and thiourea structure;During the preparation of the perovskite photoelectric conversion material, the introduction of modified dopant can realize efficient and uniform bulk doping, significantly improve the photoelectric conversion efficiency and long-term operation stability of the material, prevent the device from appearing efficiency decay, ion migration and phase separation and other problems under continuous work, and has broad application prospect.

The invention provides a method for reducing carbon vacancies of a silicon carbide crystal material. The method comprises the following steps: putting a cleaned initial silicon carbide sample into an oxidizing furnace; within the preset first oxidation time, the temperature in the oxidation furnace is increased to the intermediate temperature from the initial temperature; within a preset second oxidation time, continuously introducing a carrier gas into the oxidation furnace; soaking the silicon carbide sample after the second oxidation time in a preset buffer solution to remove an oxide layer on the surface of the silicon carbide sample; carrying out atmosphere high-temperature annealing treatment on the silicon carbide sample without the oxide layer according to a preset target temperature within a preset annealing time to obtain a target silicon carbide sample; and performing carbon vacancy test on the target silicon carbide sample. According to the method, high-temperature oxidation and high-temperature annealing are utilized, the carbon vacancy density can be reduced, the SiC epitaxial material with low carbon vacancy and long minority carrier lifetime is obtained, and the method is suitable for manufacturing high-voltage bipolar semiconductor power devices.

This utility model belongs to the field of household appliance technology and relates to the structure of a built-in storage box in a frost-free refrigerator. It includes a main body of the built-in storage box, with a built-in handle installed on the end face of the main body. An adjustment component is located in the middle of the main body, and a partition plate is connected to the middle of the main body via the adjustment component. An auxiliary support component is located at the bottom of the partition plate. This utility model allows the partition plate to be moved by rotating the adjustment head, thus flexibly adjusting its position. This allows for free adjustment of the partition layout according to the size, quantity, or preservation needs of the food, significantly improving space utilization and reducing the risk of localized crowding or empty spaces inside the main body due to a fixed partition plate. It provides a more precise storage environment for different foods and enhances the convenience for users to dynamically optimize the internal structure of the refrigerator according to their daily habits.

The invention discloses a gas-liquid reaction coprecipitation preparation method of a Prussian white positive electrode material, and belongs to the technical field of sodium ion batteries. The preparation method comprises the following steps: dissolving soluble bivalent transition metal salt and organic acid sodium salt in deionized water to prepare a solution A; introducing hydrogen cyanide gas into the solution A, and carrying out a co-precipitation reaction at a certain temperature for a certain time to prepare a solid precipitate; and finally, centrifuging, washing and drying the prepared solid precipitate to obtain the Prussian white positive electrode material. The preparation process is simple, and the production cost is reduced; the crystallization rate of the Prussian white positive electrode material is slowed down, and the prepared positive electrode material has high crystallinity, large-particle morphology and excellent structural stability.

The invention relates to the technical field of gas detection, in particular to a preparation method of a stannic oxide-based nano material, a VOC (volatile organic compound) gas sensor and a preparation method. The preparation method of the stannic oxide-based nano material provided by the invention comprises the following steps: mixing a tin source and a dispersing agent in a first solvent to prepare a mixed solution; adjusting the pH value of the mixed solution to 3.8-13.5, carrying out a hydrothermal reaction, carrying out solid-liquid separation, and collecting a solid-phase substance to prepare a microsphere precursor; and carrying out sintering treatment on the microsphere precursor to prepare the stannic oxide-based nano material. The preparation method provided by the invention is simple in process, and the gas-sensitive property of the stannic oxide-based nano material can be effectively improved.

The invention relates to a trans-solar cell module based on a 1-allyl-3-methylimidazolium hexafluorophosphate perovskite additive and a preparation method of the trans-solar cell module, and relates to the field of solar cells. The perovskite solar module structure sequentially comprises transparent conductive glass, a hole transport layer, a perovskite layer, an electron transport layer and a back electrode layer from bottom to top. An additive with a certain concentration is added into the perovskite layer, the additive is 1-allyl-3-methylimidazolium hexafluorophosphate, and the concentration of the additive is 0.2 mg / ml to 2.0 mg / ml. The crystallization process of the large-area perovskite thin film is optimized through the 1-allyl-3-methylimidazolium hexafluorophosphate additive, the defect concentration of the thin film is reduced, and the performance of the perovskite photovoltaic module is improved.

The novel automatic tool changing device comprises a clamping body, a flange plate, a piston rod, a mandrel, a pull claw, a detection ring A, a switch a and a switch b, the flange plate is fixed to the top of the center of the clamping body, and the piston rod is installed in the center of the interior of the flange plate and the center of the interior of the clamping body; a mandrel in the vertical direction is installed at the center position of the lower portion in the clamping body, a pull claw is installed in an inner cavity of the mandrel, and the lower end of the piston rod is connected with the pull claw. The piston rod is sleeved with a detection ring A at the position close to the upper end of the piston rod, an L-shaped support is arranged between the detection ring A and the top of the flange plate, and a switch a and a switch b are installed on a vertical plate of the L-shaped support. Automatic tool changing of the tool holder of the large heavy-cutting turning machine tool is achieved, the connection part of the device and the ram is the same as that of a standard turning tool holder, and one set of device is provided with a tool holder grabbing mechanism, a tool holder clamping mechanism, an auxiliary tool loosening mechanism and a detection mechanism.

The invention discloses a printing system capable of performing double-width printing, which comprises a conveying guide belt, a printing mechanism and a printing mechanism, the printing unit is located on the conveying guide belt and used for printing the two passing printing media; the printing unit comprises a system controller, a sub-queue A and a sub-queue B, wherein the system controller is used for identifying and sorting jobs to be printed to two printing media; and during printing, the system controller forms a page buffer area according to printing image parameters and printing medium parameters, and the job image data in the two job sub-queues are placed at designated positions of the page buffer area for printing. The double-width digital printing device is provided with the double-width cloth feeding control unit and the double-width cloth collecting control unit, the double-width printing function can be achieved, meanwhile, the single-width printing function can still be supported, and therefore the requirements that the capacity is not reduced and energy is not wasted when the wide-width digital printing device produces narrow-width operation are met, and the effects that the device is flexible, flexible and low in cost are achieved. And the shipment efficiency of narrow orders is improved.