5results about How to "Help with migration" patented technology

The invention discloses a nerve-like nitrogen-doped carbon confinement multi-component composite material for lithium-sulfur battery diaphragm modification and a preparation method, and relates to the technical field of lithium-sulfur batteries. The composite material comprises a three-dimensionally connected nerve-like nitrogen-doped carbon network and metal carbide nanoparticles confined at network nodes, the nerve-like nitrogen-doped carbon network is composed of carbon fibers and nodes which are connected with each other, the diameter of the nodes is larger than that of the carbon fibers, and the metal carbide nano-particles are wrapped by the graphitized nitrogen-doped carbon layer and embedded and combined at the nodes. The preparation method comprises the steps of precursor solution preparation, hydrothermal self-assembly, freeze drying and segmented heat treatment. According to the invention, the neural network structure is constructed and the metal carbide nanoparticles are confined in situ at the nodes, so that the physical barrier, chemical adsorption and catalytic conversion of polysulfide are realized, the shuttle effect is favorably inhibited, and the cycling stability and rate capability of the lithium-sulfur battery are improved.

The invention discloses a point cloud data processing method based on a point cloud Transform network, and the method comprises the steps: carrying out the local sampling and normalization processing of point cloud data, and generating an enhanced point cloud feature sequence; then, the data are input into a point cloud Transform network into which an adapter module is embedded; gating vectors generated by geometric conditions are introduced into an adapter module, and cross-layer collaborative updating is executed among different Transform coding layers by using cross-layer memory vectors, so that deep modulation of features and continuous transmission of interlayer information are realized; and finally, decoding the final point feature sequence through a downstream task head to output a classification or segmentation result. According to the method, the fixed trunk parameter set does not participate in updating in the training stage, only the adapter and task head parameters are updated, the training cost is reduced, and meanwhile the precision of the point cloud task is effectively improved.

The staggered ladder porous-solid fin micro-channel radiator with the super-hydrophobic wall face comprises a heat conduction bottom plate, a heat conduction cover plate and a plurality of composite fin units, the upper ends of the composite fin units are fixedly connected with the heat conduction cover plate, the lower ends of the composite fin units are fixedly connected with the heat conduction bottom plate, and the heat conduction bottom plate is fixedly connected with the heat conduction cover plate. A micro-channel allowing cooling liquid to flow is formed between every two adjacent composite fin units, and the two ends of each micro-channel are provided with a cooling liquid inlet and a cooling liquid outlet correspondingly. Each composite fin unit comprises a plurality of porous fins and solid fins which are sequentially distributed in a staggered mode and fixedly connected, and the porosity of micropores in the surfaces of the porous fins changes in a gradient mode in the flowing direction of cooling liquid. The inner surfaces of the heat conduction bottom plate and the heat conduction cover plate and the surfaces of the two sides of the solid fins are all super-hydrophobic surfaces, the super-hydrophobic surfaces comprise base materials, and grooves consistent with the microchannels in direction are machined in the surfaces of the base materials. The heat dissipation efficiency of the micro-channel radiator under high heat flux is effectively improved, and the flow resistance of cooling liquid is reduced.

The present application relates to a kind of lithium iron phosphate material, the lithium iron phosphate material has typical olivine structure, belongs to orthorhombic space group Pnma, the preparation method of the lithium iron phosphate material, comprising the following steps: (1) lithium carbonate of battery grade, boric acid, magnesium hydroxide are mixed uniformly according to certain proportion with iron phosphate, carbon source, wherein, n1 lithium carbonate: n2 iron phosphate is 1~1.02:1, the addition amount of carbon source is 10~15% of total weight, boric acid, magnesium hydroxide as additive, the content of boric acid, magnesium hydroxide is 0~2%, obtain mixture S1;(2) S1 is placed into fine grinder and is finely ground, speed 20~50r / min;Time 0.5~1h, obtain D50 particle size 0.5~0.6 μm mixed product S2;(3) S2 is sprayed in spraying equipment, obtain product S3, in roller hearth kiln sintering, sintering temperature is 650~800 DEG C, sintering atmosphere is inert gas, sintering time is 1~8h, obtain product as S4.By adding low melting point substance boric acid and magnesium hydroxide, it is conducive to sintering reaction LiFePO4 Crystal growth.

The application discloses a kind of core-shell structure diamond micro powder and preparation method thereof, using highly dispersed few-layer graphene oxide solution to wrap diamond micro powder, then the diamond micro powder wrapped by graphene oxide is reduced to obtain the core-shell structure diamond micro powder wrapped by graphene, the obtained core-shell structure diamond micro powder, graphene is evenly coated on diamond particle outside, after coating, diamond particle is uniformly distributed, dense accumulation arrangement on microstructure, can reduce the friction between diamond micro powder particles under high pressure in the synthesis process of composite sheet, make it more dense accumulation, can solve the uneven distribution of prior art graphene in diamond micro powder, can prevent the residue of excess graphene in sintering process, and help the migration of metal catalyst and the formation of D-D bond, improve the performance of final product, prepare high-density high-strength diamond composite sheet.