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2523 results about "Sheet structure" patented technology

Preparation method of ferro-nickel bi-metal hydroxide of sheet structure on foamed nickel through in-situ growth

The invention discloses a preparation method of a ferro-nickel bi-metal hydroxide of a sheet structure on foamed nickel through in-situ growth, and belongs to the field of electrochemistry. Nickel nitrate hexahydrate, iron nitrate nonahydrate, urea, ammonium fluoride and foamed nickel are adopted as main raw materials, and an electrocatalyst through water electrolysis oxygen production is successfully prepared. The sheet structure of the catalyst supplies abundant active sites, due to existence of substrate foamed nickel, the electrical conductivity is enhanced, and when the hydroxide is adopted as the electro-catalysis oxygen production catalyst, the excellent catalysis activity is shown. The activity of a traditional non-noble metal material under an oxygen evolution reaction (OER) in analkaline electrolyte is not ideal. Accordingly, the OER catalysis performance of the non-noble metal material under the alkaline condition is improved, and the method is of great significance in solving the fossil fuel energy crisis. Nickel and iron earth reserve volumes are quite abundant, the OER catalytic performance of the ferro-nickel bi-metal hydroxide of the sheet structure under the alkaline condition is excellent, and the hydroxide is a catalytic material with the wide prospect.
Owner:QINGDAO UNIV

Current collector and preparation method thereof

The invention provides a current collector and a preparation method thereof. The current collector comprises a current collector foil and at least one surface of the current collector foil is coated with coating layers containing graphene and a binder. The preparation method comprises the following steps of dispersing graphene and the binder in a solvent to obtain slurry, coating the slurry on at least one surface of the current collector foil and drying. Graphene of the coating layer has a two-dimensional sheet structure and thus the graphene forms a uniform and compact coating on the surface of the current collector foil so that a contact area of the graphene and the surface of the current collector is greatly improved; a conductive contact between an active material and the current collector is improved; the interface resistance of the current collector and the active material is effectively reduced; and internal resistance of a cell is reduced. Contact areas of graphene layers paved on the surface of the current collector and contact areas of the graphene layers and the current collector are large and thus interactional forces are strong; falling off is difficult; adhesive forces are strong; separation of the active material and the current collector is avoided in charging and discharging; and internal resistance reduction is promoted.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI

Burner cap of household gas stove and combustor provided with same

The invention discloses a burner cap of a household gas stove. The burner cap of the household gas stove comprises a burner cap body and an upper cover arranged at the top of the burner cap body. The burner cap is characterized in that the burner cap body is provided with an inner ring wall and an outer ring wall, a center through hole is formed in the center of the inner ring wall, an annular channel is formed between the inner ring wall and the outer ring wall, a through hole is formed in the bottom of the annular channel, and the upper cover is of a sheet structure densely provided with meshes. The invention further discloses a combustor provided with the burner cap of the household gas stove, the burner cap is arranged on a gas mixing chamber, the center through hole is communicated with an inner ring gas mixing cavity, and the through hole in the bottom of the annular channel is communicated with a middle ring gas mixing cavity. The burner cap of the household gas stove has the advantages that by the adoption of the burner cap, a middle ring needs little secondary air, an inner ring achieves fully premixed atmospheric combustion, the temperature of burning flame reaches about 1000 DEG C, the flame is directly injected, combustion is centralized, the secondary air takes little heat away, and therefore the heat efficiency is good; on the premise of ensuring the heat efficiency, little secondary air is needed, and the diameter of the combustor can be small relatively.
Owner:NINGBO FOTILE KITCHEN WARE CO LTD

Hydrophilic polyvinylidene fluoride modified separation membrane and preparation method thereof

The invention discloses a hydrophilic polyvinylidene fluoride modified separation membrane and a preparation method thereof. The separation membrane is prepared from polyvinylidene fluoride, a polyvinylidene fluoride solvent, a carbon oxide carbon nano tube / graphene oxide and a pore-forming agent. According to the hydrophilic polyvinylidene fluoride modified separation membrane, on one hand, hydrophilicity of the separation membrane is enhanced through oxygen-containing functional groups in the carbon oxide carbon nano tube and graphene oxide, on the other hand, graphene oxide of a sheet structure enters a carbon oxide carbon nano tube network of a tubular structure for mutual intercalation to form a stable sandwich layered structure, therefore, agglomeration of the same nano structure bodies can be effectively inhibited, and migration and assembly of graphene oxide to the surface of a composite membrane are facilitated, and the contact area of the carbon oxide carbon nano tube and graphene oxide and macromolecule matrix in the composite membrane is remarkably improved, and thus, the hydrophilicity and anti-pollution capacity of the membrane are enhanced, so that the water flux of the membrane is substantially improved. In addition, the preparation method is simple in operation technology and is easily carried out.
Owner:TIANJIN POLYTECHNIC UNIV
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