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The application discloses a resistive switching memory structure and a manufacturing method thereof. The resistive switching memory structure comprises, from bottom to top, a bottom electrode, a resistive switching layer and a top electrode. The upper surface of the bottom electrode and the lower surface of the resistive switching layer are in Schottky contact, and the lower surface of the top electrode and the upper surface of the resistive switching layer are in Ohmic contact. The resistive switching layer is a single oxide film layer. The materials of the bottom electrode and the top electrode are the same metal nitride, and the atomic number ratio of metal elements to nitrogen elements in the top electrode is greater than that in the bottom electrode. The application can simplify the structure of the memory, reduce the process complexity and manufacturing cost.

This invention discloses a single-atom catalyst based on a functionalized MOF, its preparation method, and its application. The method includes the following steps: dissolving an X metal precursor solution, Zn precursor powder, and 2-methylimidazolium organic ligand powder in alcohol, ultrasonically mixing, microwave heating, oven drying, and tube furnace calcination to obtain an X / MOF material; dissolving the X / MOF material in alcohol, adding carbon powder, ultrasonicating, and then adding a Pt precursor solution, stirring; adding an alkaline solvent dropwise, microwave heating, washing, centrifugation, drying, and calcination to obtain a Pt-X bimetallic single-atom catalyst. The catalyst obtained by this invention has an X metal single atom supported by a MOF core and a Pt single atom supported by carbon shell. Compared to catalysts with two or more metal active components simultaneously supported in the core or shell, this isolated structure is beneficial for the dispersion of single atoms and prevents them from agglomerating into large atomic clusters, thus ensuring structural stability.

The application provides a battery cell, which comprises a positive electrode sheet, a separator and a negative electrode sheet; the positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer; the positive electrode active material layer comprises a positive electrode active material, the positive electrode active material comprises lithium cobaltate, the particle size of the lithium cobaltate is d1, the unit is mu m, and the value range of d1 is 0 mu m < d1 <= 2 mu m; the negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer coated on the surface of the negative electrode current collector; the thickness of the negative electrode current collector is 7 mu m-11 mu m; the negative electrode active material layer comprises a second binder, and the second binder comprises a CMC compound; by introducing lithium cobaltate particles with a particle size of 0-2 mu m into the positive electrode sheet, adopting a negative electrode current collector with a thickness of 7 mu m-11 mu m, and simultaneously adopting a CMC compound in the negative electrode active material layer, the direct current resistance of the battery can be small, the heat generation in the cycle process can be reduced, the by-products caused by temperature rise can be relatively reduced, and the long cycle performance of the battery cell can be ensured.

The present application relates to the technical field of asphalt modification, and particularly relates to a hydrophobic modified lanthanum cerium oxide, a preparation method and application thereof. The hydrophobic modified lanthanum cerium oxide is prepared by the preparation method. The preparation method comprises the following steps: adding a first suspension containing a carboxylic acid alkyl surfactant into a second suspension containing nano lanthanum cerium oxide, and obtaining a mixed solution containing a pre-product after stirring and reaction; obtaining a solid-phase pre-product after solid-liquid separation of the mixed solution containing the pre-product; and obtaining a hydrophobic modified lanthanum cerium oxide powder after washing, drying, grinding and screening through a 200-mesh screen in sequence. The application is the application of the hydrophobic modified lanthanum cerium oxide in asphalt ultraviolet aging resistance. The present application can ensure good ultraviolet resistance of asphalt.