5617 results about "Structural stability" patented technology

The invention discloses a two-dimensional fiber cloth reinforced ceramics based composite material and the preparation technique, which adopts the two-dimensional fiber cloth as the reinforcing phase and the ceramic powder or the refractory metal powder as the stuffing, and the carbon and the carborundum as the base. The process steps are following: first the sizing agent with different ceramic powder and metal powder is coated on the two-dimensional fiber cloth, and then overlapping, puncturing and repeated densification are carried out. The preparation method has the advantages of lowering preparation cost and shortening preparation cycle, and the two-dimensional fiber cloth reinforced ceramics based composite material has the advantages of high shear strength between layers, structural stability and high reliability. The types of fiber cloth and the base can be adjusted and optimized in a wider range according to the applications, so as to be applicable for different fields.

Disclosed herein are a secondary battery, which is formed in the shape of a plate and has an electrode assembly mounted in a battery case made of a laminated sheet including a metal layer and a resin layer, wherein the secondary battery is constructed in a structure in which independent coupling type frame members are mounted to the outside part of a sheathing member serving as the battery case, and a medium- or large-sized battery module including the same as a unit cell. Consequently, the secondary battery has a high mechanical strength and a large sealing force. Furthermore, the electrical connection is accomplished without bending the electrode leads. Also, the battery module, which is constructed with the secondary battery as a unit cell, can be manufactured with a compact structure and a relatively light weight. Furthermore, the assembly process of the battery module is greatly simplified. The structural stability of the battery module according to the present invention is very high, and therefore, the battery module can be preferably used as a power source for electric vehicles, hybrid electric vehicles, electric motor cycles, and electric bicycles.

The present invention provides a high silica-alumina ratio small crystal grain NaY molecular sieve. The skeleton silica-alumina ratio of NaY molecular sieve, namely. SiO2/Al2O3 mole ratio is 6.0-7.0, and the average grain size is 300-800 nm. It can be made up by adopting non-template agent direct synthesis process. Its preparation method includes the following steps: firstly, stirring and ageing for 0.5-48 hr at 15-60deg.C to obtain crystallization guide agent, then mixing said guide agent, water, silicon source and aluminium source to obtain reaction mixture, then crystallizing said mixture at twice, first steps is dynamic crystallization and second step is static crystallization, finally, filtering, washing and drying so as to obtain the invented high silica-alumina ratio small crystal grain NaY molecular sieve whose relative crystallinity is greater than 80%.

The invention discloses a preparation method of a silicon and carbon-coated graphene composite cathode material. The technical problem to be solved is to enhance the electronic conductivity of the silicon-based cathode material, buffer the volume effect produced in the process of deintercalation of the lithium in the silicon-based cathode material and enhance the structure stability in the circulation process of the material at the same time. The material is prepared by using a spray drying-thermally decomposing treatment process in the invention. The preparation method comprises the following steps of: evenly dispersing nano silicon and graphite micro powder in a dispersion solution of oxidized graphene, carrying out thermal treatment under an inert protection atmosphere after spray drying, subsequently cooling along a furnace to obtain the silicon and carbon-coated graphene composite cathode material. The extra binder does not need to add in the process of manufacturing balls in the invention and the outer oxidized graphene is thermally reduced in situ to graphene in the thermal treatment process of the composite precursor, so that the process is simple and easy to operate; and the practical degree is high. The prepared composite material has the advantages of great reversible capacity, designable capacity, good cycling performance and high-current discharging performance, high tap density and the like.

Disclosed herein are a secondary battery including an electrode assembly for charging and discharging mounted in a sheathing member including a metal layer and a resin layer, wherein the secondary battery further includes a secondary battery having a molding part of a predetermined thickness at least partially formed at the outside of a sheathing member, preferably, at a sealing region of the sheathing member, and a medium- or large-sized battery pack including the same. The molding part is formed at the outside of the sheathing member of the secondary battery. Consequently, the secondary battery according to the present invention has high mechanical strength, and therefore, it is possible to construct a battery pack without using addition members, such as cartridges. When the molding part is formed at the sealing region, which is weak, the molding part increases the mechanical strength and the sealing force of the secondary battery. Consequently, a battery pack including the secondary batteries as unit cells can be manufactured generally in a compact structure and with relatively small weight, and the assembly process of the battery pack is greatly simplified. The battery pack according to the present invention has high structural stability. Consequently, the battery pack can be preferably used as a power source for electric vehicles, hybrid electric vehicles, electric motorcycles, and electric bicycles.

The present invention relates to a cathode active material for a lithium secondary battery and a process for preparing the same. In accordance with the present invention, the cathode active material having a high packing density was designed and synthesized and thus provided is a cathode active material for a lithium secondary battery exhibiting structural stability such as improved characteristics for charge/discharge, service life and high-rate and thermal stability, by modifying surface of the electrode active material with amphoteric or basic compounds capable of neutralizing acid produced around the cathode active material.

A design method of an easily-removable support structure for SLM-manufactured metal parts is applied to the design of supports for the structures such as suspended planes and surfaces in the process of producing metal parts by SLM (selective laser melting), so that the surfaces can be formed, and stability of the structures on the surfaces and forming quality can meet the technical requirements. A meshed thin-walled structure support is designed by the design method; a saw-toothed structure is designed at the connection of a support and a solid body. The meshed thin-walled structure support has the advantages that weight of the support and even consumption of powder are decreased; forming strength of the support suspended surfaces is met, and the support is easy to remove by mechanical methods; manufacturing time of the support is shortened, and efficiency is improved. The saw-toothed structure has the advantages that strength of the connection of the support with the solid body is decreased, and the influence of many supports upon the surface quality of the formed surfaces after removal is avoided. The support structure is easy to impellent and to produce and is easy to remove during the post-treatment process, the surface roughness of the support faces can be minimized, and the design method is suitable for mass production.

Compositions and methods for making stabilized mesoporous materials. Surfactant-treated mesoporous precursor materials can be heat-treated in the presence of steam and/or ammonia in a heat-treating environment. The steam and/or ammonia can be introduced into the heat-treating environment via in situ and/or ex situ sources. Such stabilized mesoporous materials can have increased structural stability.

The invention relates to a spinel nickel manganese acid lithium and layered lithium-rich manganese-based composite cathode material with a core-shell structure and a preparation method thereof, which belongs to the technical field of material synthesis. The prepared lithium ion composite cathode material takes a layered lithium-rich manganese-based Li[Lia(NixCoyMnz)]O2 as a core material, takes spinel nickel manganese acid lithium LiNi0.5Mn1.5O4 as a shell material; a coprecipitation method is employed to obtain a core-shell precursor, the core-shell precursor and the lithium source are uniformly mixed and calcined to obtain the spinel nickel manganese acid lithium and layered lithium-rich manganese-based composite cathode material with the core-shell structure. According to the invention, the layered lithium-rich manganese-based is taken as the core material, and the spinel nickel manganese acid lithium is taken as the shell material; under the prerequisite that material gram capacity is kept, material structural stability is increased, material cycle, multiplying power and safety performances are improved, function composite and complementation of the core material and the shell layer material can be realized, and the problem that high capacity and high security can not be achieved simultaneously is solved. The composite cathode material has the advantages of simple process and obviously increased performance.

An armature for an electric motor is constructed from a pair of precision machined copper plates cut in a pattern to produce a series of axially extending surface conductive bands with each band separated from the other by an insulated cutout. The precision machined plates are rolled to form two telescoping, hollow cylinders with each cylinder having a pattern of conductive bands representing a half-electric circuit. The outer surface of the inner cylinder is wrapped with several layers of fiberglass strands for structural stability and insulation. The fiberglass wrapped inner cylinder is telescoped inside the outer cylinder. The outer surface of the telescoped structure is also wrapped with several layers of fiberglass strands for structural stability. The conductive bands from the outer cylinder being the near mirror image of the conductive bands of the inner cylinder are helically coupled to form a complete electrical circuit. The resulting tubular structure is encapsulated in a potting material for further structural stability and insulation. The result is a freestanding ironless core inductive armature coil for a DC motor with brushes. The armature also has a commutator, which is mounted at one end of the coil and is in electrical contact with the helically coupled conductive bands. An insulated flywheel and shaft assembly is mounted inside the coil with the flywheel behind the commutator for motor mounting and operation.

The present invention relates to a liquid cooling assembly for cooling electronic components. The liquid cooling assembly contains a heat spreader plate rigidly coupled to a structural foam layer for providing mechanical support and thermal dissipation for the electronic components. A fluid channel, rigidly coupled to the structural foam, is provided for directing a cooling fluid in the plane of the heat spreader and a bottom plate rigidly coupled to the structural foam to protect the electronic components against one or more destructive shock events and to provide thermal dissipation of heat generated by the electronic components. The present invention also provides a maze structure in the liquid cooling assembly to increase structural stability against destructive shock events. The present invention relates to a ruggedized electronics enclosure for housing electronic components containing a top compartment configured to house the electronic components. The top compartment contains a first electronics layer and a second electronics layer adjacent to said first electronics layer and a cooling assembly, rigidly coupled to the top compartment. A thermal shunt is configured to channel heat from the first and second electronics layers to the cooling assembly and to provide additional mechanical support to protect against potentially destructive shock events.

The invention provides a flexible display panel, which comprises a first flexible substrate, a second flexible substrate and a frame sealant, wherein the second flexible substrate is arranged opposite to the first flexible substrate; the frame sealant is positioned between the first flexible substrate and the second flexible substrate for adhering the first flexible substrate and the second flexible substrate and is made of an elastic material; the flexible display panel has a curvature radius; and the young modulus numerical value of the frame sealant corresponds to the size of the curvature radius. By using the flexible display panel, the frame sealant of the elastic material is arranged between the two substrates; and when a flexible element in the flexible display panel bends, stress between the frame sealant and the substrates can be buffered by the elastic frame sealant material, and the structural stability of the flexible element can be improved.

A semiconductor stack of a FinFET in fabrication includes a bulk silicon substrate, a selectively oxidizable sacrificial layer over the bulk substrate and an active silicon layer over the sacrificial layer. Fins are etched out of the stack of active layer, sacrificial layer and bulk silicon. A conformal oxide deposition is made to encapsulate the fins, for example, using a HARP deposition. Relying on the sacrificial layer having a comparatively much higher oxidation rate than the active layer or substrate, selective oxidization of the sacrificial layer is performed, for example, by annealing. The presence of the conformal oxide provides structural stability to the fins, and prevents fin tilting, during oxidation. Selective oxidation of the sacrificial layer provides electrical isolation of the top active silicon layer from the bulk silicon portion of the fin, resulting in an SOI-like structure. Further fabrication may then proceed to convert the active layer to the source, drain and channel of the FinFET. The oxidized sacrificial layer under the active channel prevents punch-through leakage in the final FinFET structure.

An LED bulb uses an LED strip suspended between two lead frames of a stem as a light source to provide uniform illumination with wider angles. The lead frames of the stem provide an improved structural stability to the LED strip while maintaining a reliable electrical connection between the components of the stem and the LED strip. The utilization of both top-emitting and side-emitting LEDs on the LED strip further allows lights emitted in directions substantially parallel and perpendicular to the LED strip to cover a wide angle of illumination from the LED bulb.

The invention discloses a graphene-based nano iron oxide composite material and a preparation method thereof. By the method, iron oxide nano granules with uniform diameter and controllable shape and components can be loaded on graphene. The method comprises the following steps of: uniformly dispersing graphite oxide into deionized water by adopting an ultrasonic method to obtain graphene oxide solution; adding an iron salt precursor into the obtained solution and mixing the precursor and the solution uniformly, adjusting the pH of the solution, and hydrolyzing the iron salt; putting the mixed solution into a reaction kettle and performing hydrothermal reaction; and finally, cleaning and freeze-drying the obtained product to obtain the graphene-based nano iron oxide composite material. The raw materials are common and easily obtained, the cost is low, and the preparation process is simple, safe and environmentally-friendly; the prepared graphene-based nano iron oxide composite material has good structural stability and monodispersity; when the composite material is used as a lithium iron battery electrode material, the charge/discharge capacity can reach over 1,000mAh/g; and the composite material has good multiplying power performance and cycle life.

The invention relates to the technical field of lithium-ion batteries, in particular to an electrolyte of the lithium-ion battery and the lithium-ion battery containing the electrolyte. The electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive, wherein the additive comprises a film-forming additive A and a stabilizing additive B; the stabilizing additive B is a chainlike disulfonic acid ester compound as shown in a formula I and/or a formula II; and the film-forming additive A forms an SEI film on a negative electrode surface of the battery and the side reaction of a negative electrode interface and the electrolyte is reduced, so that the film-forming additive A is an necessary precondition that the battery has relatively good cycle performance. The stabilizing additive B can form a CEI film on a positive electrode surface, the activity of a positive electrode interface and the electrolyte is inhibited, direct contact oxidation of a positive electrode and the electrolyte is reduced, meanwhile, the structure stability of a positive electrode material is improved and the structure is not easy to collapse and crush due to generation of the stress, so that the electrolyte has excellent high-temperature storage performance and high-temperature cycle performance through combination of the additive A and the additive B.

The invention relates to graphene-oxide-modified phenolic-resin-based ultrafine porous carbon fiber and a preparation method thereof. The diameter of the fiber is in a range of 0.3-1.7mum, and the specific surface area of the fiber is 500-900m<2>/g. The fiber has a porous structure which is formed by microporous mainly. Micro-pore volume is 0.20-0.50cm<3>/g, and surface oxygen atomic ratio is lower than 10%. The preparation method comprises the steps that: graphene oxide is added into an organic solvent and is subjected to ultrasonic dispersion, such that a graphene oxide solution is formed; termosetting phenolic resin and a high-molecular-weight linear polymer are added into the graphene oxide organic solution, and are completely dissolved by stirring; the mixed solution is spun into composite fiber, and solidification and carbonization are carried out, such that porous phenolic-resin-based carbon/graphite oxide composite ultrafine fiber is obtained. The sources of adopted raw materials are rich. The prepared composite fiber has the advantages of high structural stability, good flexibility, developed pore structure, controllable surface oxygen content, and suitability for practical application.