Abstract: The present invention provides a fluid measurement apparatus, including a pressure sensing element and a data processing element. The pressure sensing element is disposed in direct contact with a measured fluid, the pressure sensing element is a sealed element, and includes a first surface and a second surface that are disposed opposite to each other, the measured fluid directly impacts the first surface and the second surface, and pressure values generated when the first surface and the second surface are impacted by the measured fluid are detected. The data processing element is connected to the pressure sensing element, and a flow velocity and/or a flow rate of the measured fluid are/is calculated by using the pressure value detected by the pressure sensing element. The present invention resolves a problem that the fluid measurement apparatus cannot operate normally due to clogging of a pressure tap hole.

Abstract: A method for preparing a graphene-coated powder material, comprising: A) dispersing a graphene powder and/or graphene oxide powder, a powder material to be coated with graphene, and a polymeric co-coating agent in a first organic solvent to form a first organic solvent dispersion; B) mixing the first organic solvent dispersion with a second organic solvent and separating a precipitate after sedimentation; and C) annealing the precipitate in an inert atmosphere to obtain the graphene-coated powder material; wherein the polymeric co-coating agent is soluble in the first organic solvent but insoluble in the second organic solvent. The present invention also relates to a graphene-coated powder material prepared by the method.

Abstract: An aluminum laminated packaging film, and lithium-ion battery using same. The aluminum laminated film (1) comprises an aluminum layer (12), a graphene layer (14), and a sealing layer (13) in sequence. The graphene layer (14) comprises graphene sheets and a thermoplastic polymer adhesive. The platelet structure of the graphene and irregular arrangement of the graphene enable locations between sheets to form indirect and complex paths, creating a huge barrier for lithium ions moving toward the aluminum layer, thus preventing the lithium ions from forming aluminum-lithium alloy with the metal aluminum, and avoiding corrosion of the aluminum layer (12).

Abstract: A method for preparing a graphene-coated powder material, comprising: A) dispersing a graphene powder and/or graphene oxide powder, a powder material to be coated with graphene, and a polymeric co-coating agent in a first organic solvent to form a first organic solvent dispersion; B) mixing the first organic solvent dispersion with a second organic solvent and separating a precipitate after sedimentation; and C) annealing the precipitate in an inert atmosphere to obtain the graphene-coated powder material; wherein the polymeric co-coating agent is soluble in the first organic solvent but insoluble in the second organic solvent. The present invention also relates to a graphene-coated powder material prepared by the method.

Abstract: Provided is a method for preparing a graphene/ternary material composite for use in lithium ion batteries, comprising the following preparation steps: (a) mixing a ternary material and a graphene oxide powder in an organic solvent to form a mixed dispersion; (b) adding a reducing agent to the mixed dispersion from step (a), and carrying out a reduction reaction at a reduction temperature of 80-160° C. while stirring, to obtain a reduction reaction mixture after a reduction time of 60-240 min; and (c) evaporating the solvent from the reduction reaction mixture from step (b) while stirring, and drying and then annealing the mixture at a low temperature in an inert atmosphere to obtain a graphene/ternary material composite having a three-dimensional network structure. Also provided is a graphene/ternary material composite prepared by using this method.

Abstract: Present invention provides a high-precision pressure sampling head used in a Pitot tube flow sensor. The pressure sampling head includes a cylindrical pressure sampling head body. The cylindrical pressure sampling head body contains a total pressure channel and a static pressure channel. The axis of the total pressure channel and the axis of the static pressure channel are parallel to the axis of the cylindrical pressure sampling head body. Two inclined surfaces are formed on two opposite sides of the lower end of the cylindrical pressure sampling body. A first inclined surface intersects with the total pressure channel and thus a total pressure sensing hole is formed on the first inclined surface. A second inclined surface intersects with the static pressure channel and thus a static pressure sensing hole is formed on the second inclined surface.