1966 results about "Conductive composites" patented technology

Disclosed are ionically conductive composites for protection of active metal anodes and methods for their fabrication. The composites may be incorporated in active metal negative electrode (anode) structures and battery cells. In accordance with the invention, the properties of different ionic conductors are combined in a composite material that has the desired properties of high overall ionic conductivity and chemical stability towards the anode, the cathode and ambient conditions encountered in battery manufacturing. The composite is capable of protecting an active metal anode from deleterious reaction with other battery components or ambient conditions while providing a high level of ionic conductivity to facilitate manufacture and/or enhance performance of a battery cell in which the composite is incorporated.

The invention relates to a graphene-based novel material and a chemical vapor deposition preparation technology thereof, in particular to graphene foam with a three dimensional fully connected network and a macroscopic quantity preparation method thereof. The method is suitable for a mass preparation of the graphene foam with high qualities. Three dimensional connected graphene can grow by catalytic cracking of carbon source gases on the surface of a three dimensional porous metal through the chemical vapor deposition technology, and a porous foam-shaped graphene three dimensional macroscopic body can be obtained after a porous metal base is removed by dissolving subsequently. According to the graphene foam with the three dimensional fully connected network and the macroscopic quantity preparation method thereof, a simple template replication method is used for preparing the three dimensional connected graphene macroscopic body, and the method has the advantages that the operation is simple and convenient, the rate of production is high, and the adjustment and control of the structure are easy. The graphene foam forms the fully connected network in a seamless connection mode, has a low density, a high porosity and specific surface area and excellent capabilities of charge conduction and heat conduction and establishes a foundation for applications of graphene in fields of electric conduction, thermally conductive composite materials, electromagnetic shielding, wave absorbing, catalysis, sensing and energy storage materials and the like.

A conductive composite material is provided, including: a base layer; a conductive fiber thin-film made of conductive fiber and formed on the base layer; and a mixture layer in which part of the conductive fiber is inserted into part of the base layer.

Light-emitting diode (LED) packages with improved heat transfer paths for LED dies encased therein when compared to conventional LED packages are provided. For some embodiments, the LED package includes a ceramic substrate having a top cavity with one or more LED dies disposed within and having a bottom cavity for receiving a metallic insert to dissipate heat away from the LED dies. For other embodiments, an LED package is provided that includes a ceramic substrate having a heat spreader coupled to thermal vias filled with a highly thermally conductive composite.

An apparatus with a self heating feature includes a conductive component of the apparatus having conductive composite. The conductive component is adapted to couple with a source of electricity, and the conductive component heats up on passage of electricity. According to another aspect, a domestic appliance that requires heating for its operation, includes at least one part comprising a conductive composite, which heats up on passage of electricity and the part is adapted to couple with a power supply. According to another aspect a method for providing heating in an apparatus includes heating at least one conductive component of the apparatus. The heating is done by passing an electric current through the conductive component, and the conductive component comprises a conductive composite.

This invention provides a nano-scaled graphene platelet (NGP) having a thickness no greater than 100 nm and a length-to-width ratio no less than 3 (preferably greater than 10). The NGP with a high length-to-width ratio can be prepared by using a method comprising (a) intercalating a carbon fiber or graphite fiber with an intercalate to form an intercalated fiber; (b) exfoliating the intercalated fiber to obtain an exfoliated fiber comprising graphene sheets or flakes; and (c) separating the graphene sheets or flakes to obtain nano-scaled graphene platelets. The invention also provides a nanocomposite material comprising an NGP with a high length-to-width ratio. Such a nanocomposite can become electrically conductive with a small weight fraction of NGPs. Conductive composites are particularly useful for shielding of sensitive electronic equipment against electromagnetic interference (EMI) or radio frequency interference (RFI), and for electrostatic charge dissipation.

The invention relates to a method for preparing graphene powder in large scale, which is characterized by comprising the following steps of: firstly, uniformly peeling graphene oxide into a graphene oxide suspension solution; then, atomizing the graphene oxide solution by using the spray drying technology comprising spray pyrolysis drying and spray freeze drying, and removing a solvent to obtain graphene oxide powder; and finally, oxidizing grapheme by using the non-expansion heat treatment process to obtain non-agglomerative graphene powder. The continuous preparation process of the spray technology and the non-expansion heat treatment process ensure the large-scale preparation of the graphene powder. The prepared graphene powder comprising intermediate product graphene oxide powder does not have agglomeration and has good dispersivity in the solvent. The graphene powder is used as a filling material to prepare high strength composite materials, conductive composite materials, novel air-tight flame-retardant composite materials, novel nanodevices and the like.

A catheter assembly for pressure-sensitive control of ablation treatment is disclosed. The assembly includes a conductive element, an electrode, and a pressure sensitive conductive composite member positioned between the conductive element and the electrode. At least one of the conductive pin, the pressure sensitive conductive composite element and the ablation electrode are moveable to create an engagement position and a non-engagement position. In the engagement position, the elements are electrically coupled such that ablation energy may be delivered from the conductive pin to the ablation electrode via the pressure sensitive conductive composite element. In the non-engagement position, the elements are electrically decoupled such that ablation energy is not delivered to the ablation electrode. A related method for pressure-sensitive control of ablation is also disclosed.

The invention relates to a flexible conductive thin film compositing a two-dimensional graphene and a one-dimensional nanowire and a preparation method of the flexible conductive thin film. The preparation method includes the following steps: dispersing the graphene, the nanowire and dispersion auxiliary in solvent, obtaining graphene/nanowire solvent which is well dispersed after the solvent is processed through ultrasound concussion, and obtaining a graphene/nanowire composite thin film after the graphene/nanowire solvent is processed through vacuum filtration and drying. The thickness of the composite thin film is 10 nanometers to 1000 micrometers, the composite thin film has good strength and flexibility, square resistance is between 0.001 ohm per square and 3000 ohms per square, and electrical conductivity is between 0.01 siemens per centimeter to 5000 siemens per centimeter. The graphene/nanowire composite thin film which is obtained with the adoption of the preparation method has good strength, flexibility, and electrical conductivity, and is controllable in thickness, cuttable in shape, simple in preparing process, easy to operate, low in manufacturing cost, and suitable for solar batteries, energy storage, heat dissipation, catalysis, sensing, and conductive composite material fields.

The present invention is directed to novel contact sensors. The contact sensors of the invention include a conductive composite material formed of a polymer and a conductive filler. In one particular embodiment, the composite materials can include less than about 10 wt % conductive filler. Thus, the composite material of the contact sensors can have physical characteristics essentially identical to the polymer, while being electrically conductive with the electrical resistance proportional to the load on the sensor. If desired, the sensors can be formed of the same polymeric material as the bearing that is being examined. The sensors can provide real time dynamic contact information for joint members under conditions expected during use. In one particular embodiment, the sensors can be used to examine dynamic wear characteristics of artificial joint bearings such as artificial knee, hip, or shoulder bearings.

A suppressor for a firearm includes a first gas expansion section of relatively large size sufficient to reduce the temperature and pressure of the gas expelled from a muzzle during discharge of the firearm to a level that avoids rapid degrading of structural members such as baffles in the suppressor that are downstream of the muzzle. The gas is channeled through multiple paths to distribute its energy more equally. Preferably, the suppressor is formed with a lightweight, thermally-conductive composite portion. The composite portion provides lightweight, bursting strength with good thermal conductivity and little contribution to vibrational instability of the muzzle to which it is attached. The composite portion may be of a carbon fiber, silicon, boron, or metallic base. In one embodiment, a first expansion chamber is in communication with the muzzle and with a second expansion chamber and in another embodiment, the first expansion chamber communicates with the muzzle and with the second expansion chamber The composite portions of the suppressor provide good bursting strength and heat conductivity with light weight. In some embodiments, a series of baffles creates turbulence in the gas, slowing its motion and distributing the energy more evenly over space.

In a manufacturing method of a conductive composite particle, a conductive composite particle is manufactured that is formed of an active material particle having a region capable of electrochemically inserting and desorbing lithium and a carbon layer joined to the particle surface. In the carbon layer, fine metal particles are dispersed. This method has the following three steps. In the first step, a polymer material containing the metal element composing the fine metal particles is prepared. In the second step, the active material particle surface is coated with the polymer material containing the metal element. In the third step, a carbon layer having a porous structure including a fibrous structure is formed as the surface layer section from the polymer material by a treatment where the active material particle coated with the polymer containing the metal element is heated in an inert atmosphere to carbonize the polymer material.

The disclosed conductive composite fiber with carbon nano tube comprises a conductive core layer with 60~99.5wt% thermoplastic polymer, 0~5% carbon nano tube, 0~15% conductive carbon black, and 0.5~20% dispersant; and a shin layer with fiber-forming polymer. Wherein, the preparation method comprises mixing, extruding for granulation, and mixed spinning. This invention improves product performance.

The invention provides a three-dimensional graphene/metal line or metal wire composite structure and a preparation method thereof. According to the invention, metal lines or metal wires are adopted as a catalyst template; with a chemical vapor deposition method, a carbon source directly form graphene coatings on the outer surfaces of the metal lines, such that the graphene/metal line or metal wire composite structure is formed. The diameters of the metal lines or metal wires are 10nm-5000mum. The layer number of graphene is 1-100. The three-dimensional graphene/metal line or metal wire composite structure or graphene tube provided by the invention has excellent electric conductivity and corrosion resistance. The technology provided by the invention is simple, and the process is easy to control. The composite structure is advantaged in excellent electric conductivity and low preparation cost, and is suitable to be used in fields of solar energy devices, storage batteries, conductive composite materials, and corrosion resistance.

A composite electrolyte membrane of the present invention includes a porous body composed of an inorganic substance and an electrolyte material. The porous body includes therein plural spherical pores in which a diameter is substantially equal, and communicating ports each allowing the spherical pores adjacent to each other to communicate with each other. The electrolyte material is provided on the spherical pores and the communicating ports, has proton conductivity, and is composed of a hydrocarbon polymer. The proton-conductive composite electrolyte membrane has excellent ion conductivity, high heat resistance, and restricted swelling when being hydrous, and is capable of being produced at low cost.

A system and method collects at least one measurement within a borehole formed in a formation. The system and method provides a drill collar made of a non-conductive or substantially non-conductive composite material positioned within the borehole. A downhole component is capable of collecting at least one measurement and is embedded within the composite material of the drill collar. The at least one measurement collectable by the downhole component is related to the borehole or the formation about the borehole.