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4819 results about "Lamellar structure" patented technology

Lamellar structures or microstructures are composed of fine, alternating layers of different materials in the form of lamellae. They are often observed in cases where a phase transformation front moves quickly, leaving behind two solid products, as in rapid cooling of eutectic (such as solder) or eutectoid (such as pearlite) systems.

Lithium ion battery positive pole material cobalt nickel oxide manganses lithium and method for making same

The invention relates to a nickel cobalt manganese lithium oxide material used for an anode of a li-ion battery and a preparation method. The invention belongs to the li-ion battery technical field. The nickel cobalt manganese lithium oxide material used for the anode of the li-ion battery is a li-rich laminated structure with the chemical component of Li1+zM1-x-yNixCoyO2; wherein, z is less than or equal to 0.2 and more than or equal to 0.05, x is less than or equal to 0.8 and more than 0.1, and y is less than or equal to 0.5 and more than 0.1. The preparation method of the invention is that dissoluble salt of the nickel, cobalt and manganese is taken as the raw material; ammonia or ammonium salt is taken as complexing agent; sodium hydroxide is taken as precipitator; water-dissoluble dispersant and water-dissoluble antioxidant or inert gas are added for control and protection; in a cocurrent flow type the solution is added to a reaction vessel for reaction; after alkalescence disposal, aging procedure, solid-liquid separation and washing and drying, the nickel cobalt manganese oxide is uniformly mixed with the lithium raw material; the nickel cobalt manganese lithium oxide powder is obtained by sintering the mixed powder which is divided into three temperature areas. The invention has the advantages of high specific capacity, good circulation performance, ideal crystal texture, short production period, low power loss, and being suitable for industrial production, etc.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST +1

Control panel with activation zone

An interchangeable hearing aid control panel with at least one activation zone arranged in connection with a layered structure. The layered structure has an electrically non-conducting substrate, an electrically conducting path arranged in connection with the substrate, and an electrically conducting member, such as a conducting foil, arranged at a predetermined distance from the activation zone. The activation zone can be either in a deactuated or in an actuated state. In the actuated state the conducting member and the conducting path are electrically connected while disconnected in the deactuated state. Electrical connection to an associated hearing aid is by means of a connector, such as a plug, enabling the control panel to be easily changed. Preferably, the connector is formed by a piece of flexprint. The layered structure may comprise a second conducting path. In preferred embodiments activation zones are indicated by “poppel domes” formed by a surface layer covering the layered structure. The activation zones may form an MTO control or a volume control. To fit BTE hearing aids, the layered structure preferably has an elongated structure with a length of 1-4 cm. Other shapes can be formed to fit ITE, ITC and CIC hearing aids. In preferred embodiments, the control panel comprises one or more Silicon-based microphones protected behind a surface layer of the control panel.
Owner:SONION ROSKILDE

Graphene film with ultrahigh flexibility and high thermal conductivity and preparation method of graphene film

The invention discloses a graphene film with ultrahigh flexibility and high thermal conductivity and a preparation method of the graphene film. The graphene film is prepared from an ultralarge uniform graphene oxide sheet through steps of solution film-formation, chemical reduction, high-temperature reduction, high-pressure compression and the like. The graphene film is formed through physical crosslinking of macroscopic multi-layer folded graphene with microscale folds, and inter-lamella slippage can be realized, so that the graphene film has ultrahigh flexibility. The graphene lamellar structure of the graphene film is perfect, the lamellas have ultralarge crystalline areas which are about 100 mu m and contain few defects, the structure is compact after high-pressure compression, and the graphene film has ultrahigh electrical conductivity and thermal conductivity. The graphene film with ultrahigh flexibility and high thermal conductivity can be bent repeatedly more than 1,200 times, the elongation at break is 12%-18%, the electrical conductivity is 8,000-10,600 S / cm, the thermal conductivity is 1,800-2,600 W / mK, and the graphene film can be used as a high-flexibility, thermal-conducting and electric-conducting device.
Owner:杭州德烯科技集团有限公司

Lithium ion battery and multi-element positive material thereof as well as preparation method of multi-element positive material

The invention discloses a lithium ion battery and a multi-element positive material thereof as well as a preparation method for the multi-element positive material. The chemical general formula of the multi-element positive material is LixNiaCobMncNyO2, wherein N is one of Ti, Mg and Al; x is more than or equal to 1.0 and less than or equal to 1.15; a is more than 0 and less than 1; b is more than 0 and less than 1; c is more than 0 and less than 1; y is more than or equal to 0.003 and less than or equal to 0.07; the sum of a, b, c and y is equal to 1. The multi-element positive material with a layered structure comprises a kernel pure phase layer containing lithium cobalt nickel manganese oxide, a surface doped layer containing a doped element Ti, an oxide surface cladding layer containing a cladding element Al and a shallow surface doped transitional layer which is positioned between the surface doped layer and the surface cladding layer and contains a doped element Mg. The preparation method of the multi-element positive material comprises the steps of synthesizing a multi-element precursor of which a body phase contains nickel, cobalt and manganese, then performing Ti doping and lithium treatment on the surface of a precursor liquid phase, and finally, doping Mg on the surface by a pyrogenic process and performing Al2O3 cladding treatment to obtain the composite modified multi-element lithium ion positive material.
Owner:NINGDE AMPEREX TECH

Layer-by-layer self-assembling oxidized graphene nano-filtration membrane and preparation method thereof

The invention relates to a layer-by-layer self-assembling oxidized graphene nano-filtration membrane and a preparation method of the layer-by-layer self-assembling oxidized graphene nano-filtration membrane, which belongs to the technical field of the preparation of a nano-filtration membrane. The layer-by-layer self-assembling oxidized graphene nano-filtration membrane comprises a supporting layer and a functional layer, wherein the functional layer is in a layered structure which is different from the compact structure of the traditional nano-filtration membrane functional layer. The preparation method comprises the following steps of (I) preparing an oxidized graphene solution through a hummers method; and (II) preparing an oxidized graphne nano-filtration membrane through a layer-by-layer self-assembling method. The oxidized graphene nano-filtration membrane is prepared through the layer-by-layer self-assembling method, a water passage is formed between the oxidized graphene lamellas, the distance of the oxidized graphene layer has a good interception effect for ions, the hydrophilia can be improved through the oxygen-containing functional groups on the surface of the oxidized graphene layer, so that the membrane is good in permeability and interception property. By utilizing the layer-by-layer self-assembling method, the high requirement of the traditional nano-filtration membrane preparation process on the condition can be avoided, the process is simple, the condition is easily controlled, and the application prospect is wide.
Owner:OCEAN UNIV OF CHINA
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