30results about How to "Free diffusion" patented technology

The invention relates to a graphene doped lithium iron phosphate positive electrode material and a preparation method thereof. The method comprises the following steps of: (1) mixing a soluble lithium compound, phosphate and a ferrous salt into a dispersing agent to obtain a dispersing solution a; (2) oxidizing a graphene derivative material to obtain an oxidized graphene derivative material, and performing ultrasonic dispersion to obtain a dispersing solution b; and (3) mixing the dispersing solution a and the dispersing solution b, stirring uniformly, spray-drying, and calcining to obtain the graphene doped lithium iron phosphate positive electrode material. A lithium iron secondary battery prepared from the graphene doped lithium iron phosphate positive electrode material has the advantages of high capacity, good circulating performance, large tap density, small internal resistance and long service life.

The invention relates to a composite film electrode and a preparation method thereof. The electrode is a graded porous nano composite film which is composed of an insulating substrate, a first binding layer, a conductive gold layer, a second binding layer and a modified aluminum layer, wherein small holes with a hole diameter of 2-20 nm are uniformly distributed on the conductive gold layer according to a distribution density of 1010 / cm2-1012 / cm2, and the small holes with the hole diameter of 20-400 nm are uniformly distributed on the second binding layer and the modified material layer according to the distribution density of 109 / cm2-1012 / cm2; and the preparation method of the electrode comprises the following steps of: firstly, preparing a multi-layer composite film on the insulating substrate, then, performing anodizing and hole enlargement on the multi-layer composite film to implement that an aluminum layer becomes a porous alumina layer, a gold layer becomes a nano porous structure, the second binding layer becomes a porous oxide of tantalum, niobium or titanium, and cleaning and drying the multi-layer composite film to get a finished product of the graded porous nano alumina / gold composite film electrode. The graded porous nano alumina / gold composite film electrode has high in electroanalytical activity and the dual advantages of a nano porous gold and a porous anodizedaluminum; and the preparation method is simple and reliable, solves the defect of inconvenience in operation caused by high brittleness of an AAO, and fits for mass production.

The present invention relates to a method for glass fusion. The method includes the following steps: laminating the glass; microwave processing the glass after the lamination processing; and welding the glass after the microwave processing. First, the glass is laminated to enhance the surface interface activity of the glass and promote the bonding between the glass interfaces; then the laminated glass is subjected to microwave treatment, the microwave penetrates into the glass, and the interaction between the microwave and the glass generates friction. It causes the temperature of the glass to rise, so that the inside and outside of the glass are heated and heated almost at the same time, forming a body heat source state, and the heating inside and outside the material is uniform; no additional pressure is required, and the glass interface will diffuse freely during the microwave treatment process, thus achieving tightness between the glasses. At the same time, the high temperature generated by the microwave can make the interface group of the glass group have a weak connection. After high temperature welding, the silicon-oxygen bond between the glasses can be promoted, and the tight connection of the glass sheets can be realized. Effect.