642results about How to "Improve energy storage performance" patented technology

Optical apparatus includes a multimode, gain-producing fiber for providing gain to signal light propagating in the core of the fiber, and a pump source for providing pump light that is absorbed in the core, characterized in that (i) the pump source illustratively comprises a low brightness array of laser diodes and a converter for increasing the brightness of the pump light, (ii) the pump light is coupled directly into the core, and (iii) the area of the core exceeds approximately 350 μm2. In one embodiment, the signal light propagates in a single mode, and the pump light co-propagates in at least the same, single mode, both in a standard input fiber before entering the gain-producing fiber, and a mode expander is disposed between the input fiber and the gain-producing fiber. In another embodiment, multiple pumps are coupled into the core of the gain-producing fiber. The pumps may generate light of the same wavelength or of different wavelengths. In accordance with a particular embodiment of our invention, we have demonstrated amplification of nanosecond optical pulses at 1545 nm in a single clad Er-doped fiber having a core area of 875 μm2; the core was pumped by a high brightness Raman laser at 1480 nm; and the pulses had a record peak power of several hundred kW.

A battery device includes a cathode current collector and an anode current collector. A fibrous electrode forms a structure defining a plurality of pores. A first portion of the fibrous electrode is in contact with a current collector. An electrolytic polymer is electrodeposited on the fibrous electrode to provide substantial uniform coverage of fibers forming the fibrous electrode. A plurality of electrode particles are disposed within the plurality of pores and separated from the fibrous electrode by the electrolytic polymer.

An electric power retention distribution cell supplies stored electrical power as the primary electric supply to an end user at predetermined times. The cell has a rechargeable battery assembly, a bi-directional inverter and a switch control, and is connected to an electric utility grid, to one or more end users and to alternate power generation sources, such as wind or solar. The battery assembly is charged from the alternate power generation source and from grid power, and the cell is switched at selected times to provide the primary electric supply from stored electric power in the cell to the end user. A circuit of the battery assembly gives an extended electric power storage time by controlling storage parameters. Networks using the electric cell are also described for a utility hub network formed using two or more cells, and for a regional utility hub network formed using multiple utility hubs.

An electrochemical cell assembly has electrochemical cells of large diameter and high storage capacity, making it particularly useful for stabilization of electric supply systems. The assembly includes at least one electrochemical cell composed of a layer of: a liquid metal or liquid metal alloy forming the cathode, a liquid electrolyte layer, and a layer of a liquid metal or liquid metalloid forming the anode. An electrically insulating inner tube is provided along the vertical axis of the assembly, the presence of which prevents the occurrence of the Tayler instability or other instabilities caused in the liquids by the current flow, and thus prevents the intermixing of the liquids. Another very efficient option for increasing the maximum current of the cell is that of conducting a current having a suitable direction and intensity through the interior of the inner tube.

The invention discloses a high-flexible polymer matrix composite membrane with high energy density and a preparation method thereof. The composite membrane is composed of a polymer matrix and core-shell structured nano-fibre dispersed in the polymer matrix; the core layer of the core-shell structured nano-fibre is ceramic fibre; the shell layer is an organic matter coated layer, wherein the mass percentage of the polymer matrix is 50-95%; and the mass percentage of the core-shell structured nano-fibre is 5-50%. The polymer matrix and the core-shell structured nano-fibre are composited into the membrane by adopting a solution blending and tape casting method or a bidirectional membrane pulling method, so that a flexible polymer matrix composite material having the advantages of being good in dielectric property, high in breakdown field strength and high in energy density is obtained. The dielectric constant of the composite material can be modulated to 10-40 by adjusting the content of nano ceramic fibre; simultaneously, the dielectric loss Tan delta is kept to be less than 5%, the breakdown field strength is more than 210 kV / mm, and the energy density is 2-6 kJ / L; and the composite material is a material which can be used for capacitors and high power static energy storage.

The invention relates to a micro super capacitor nano-device based on a porous-graphene-supported polyaniline heterostructure and a manufacturing method thereof. A symmetrical fork electrode structure is formed on a substrate material; forks are 100-200 nanometers in widths; the distances among the forks are 50-100 nanometers; electrolyte is added dropwise; in the fork electrode structure, gold serving as a current collector is taken as the first layer of an electrode material; porous graphene is attached to the gold and is taken as the second layer of the electrode material; polyaniline is coated on the porous graphene and is taken as the surface layer of the electrode material; the gold is 10-20 nanometers in thickness; the porous graphene is 20-40 nanometers in thickness; the polyaniline is 20-40 nanometers in thickness; the electrode material is 50-100 nanometers in total thickness. The micro super capacitor nano-device has the beneficial effects that a micro energy storing device can store more energy on the premise of ensuring high electronic conduction, so that the capacity and energy density of a super capacitor are further increased.

The invention relates to a high energy storage density and efficiency polymer composite film and a preparation method thereof. The composite film is composed of a polyvinylidene fluoride matrix and nanofiber with a core-shell structure in the polyvinylidene fluoride matrix, a core layer of the nanofiber with the core-shell structure is ceramic fiber, and the case layer is a silica coating layer. Compared with prior art, the dielectric constant of the composite film can be adjusted by adjusting the content of ceramic fiber, simultaneously, dielectric loss tangent is less than 5%, breakdown field intensity is greater than 2000kV / cm, and energy storage density is 3-7J / cm<3>. The composite film can reduce interfacial polarization generated at a ceramic-compound interface, can increase the energy storage density of PVDF, can be used for capacitor and large power static energy storage materials, has the advantages of simple and practicable operation, low cost, convenience and rapidity, and enables large scale production.

The invention discloses a renewable energy source cooling, heating and power microgrid system and a control method. The renewable energy source cooling, heating and power microgrid system comprises a power module and a cooling / heating module. According to the power module, a solar power generation system is sequentially connected with a DC / DC converter and a DC / AC converter in series and then connected with an AC bus, a wind power generation system is sequentially connected with an AC / DC converter and a DC / AC converter and then connected with the AC bus, a gas internal combustion generation system is directly connected with the AC bus, a storage battery pack is connected with the AC bus through a bi-directional DC / AC converter, variable power electricity storage hot water tanks are connected with the AC bus, and the AC bus is connected with a power distribution network through a PCC. The renewable energy source cooling, heating and power microgrid system and the control method have the advantages that clean renewable energy sources such as methane, wind energy and solar energy are adopted as energy sources of a cooling, heating and power microgrid, no pollution is caused to the environment, operation cost is very low, and the application range is wide; by the adoption of a multi-microsource energy supply mode, the problem of capacity allocation redundancy of a single energy supply system can be solved.

The present invention provides a structured, nano-composite, dielectric film. The invention also provides a method for producing the thin composite film. The composite material comprises ceramic dielectric particles, preferably nano-sized particles, and a thermoset polymer system. The composite material exhibits a high energy density.

The invention discloses a phase change microcapsule and a preparation method thereof. The phase change microcapsule comprises an outer shell and a capsule core wrapped in the outer shell, wherein thecapsule wall of the outer shell contains the polymer material of a repeating monomer unit formed from the following monomer: (A) 40-80 wt% of more than one selected from C1-C24 alkyl acrylate or C1-C24 alkyl methacrylate, and (B) 20-60 wt% of a long-chain monomer with a general formula of CH2=CR1COO(CH2CH2O)m-(CH3CHCH2O)nR2, a weight ratio of the outer shell to the capsule core is 1:1-9, and the capsule core is an organic phase change material. According to the present invention, the product has good dispersion stability in practical application, especially in the application of aqueous matrixes or inorganic materials, so as to further improve the energy storage property; and with the long-chain hydrophilic group, the interfacial action force between the phase change microcapsule and the matrix can be enhanced, and the problems of the reduced strength and the like in the application of the material can be avoided.

The invention relates to a carbon nanotube / silicon / graphene composite material and a preparation method, the method comprises the following steps: heating a substrate to 500-1300 DEG C, then introducing carbon source in a gaseous state into a reaction chamber, keeping temperature, reacting for 1-300 minutes, stopping the introduction of the carbon source in the gaseous state to obtain the carbon nanotube material; then introducing a silicon source in the gaseous state in the reaction chamber, keeping for 1-300 minutes, stopping heating of the substrate and cooling to room temperature to obtain the carbon nanotube / silicon composite material; taking the carbon nanotube / silicon composite material, placing graphene and the carbon nanotube / silicon composite material in absolute ethyl alcohol for ultrasonic reaction, then filtering and drying to obtain the carbon nanotube / silicon / graphene composite material. In the carbon nanotube / silicon / graphene composite material, the prepared silicon carbon composite material is used for a cathode material of a lithium ion battery, and has excellent energy storage performance and cycle performance.

The invention relates to a damping device, especially active vibration absorber and the control method. Said vibration absorber in vibration absorbing system comprises main drive part, vibration absorbing block, changeably stiffness part, magnetic insulation block and U-shaped bracket. The main drive part comprises permanent magnet and column electromagnet. The column iron core is fixed on the bottom of bracket and permanent magnet is fixed with vibration absorbing block by magnetic insulation block. The changeably stiffness part comprises U-shaped electromagnet and MR elastomer. U-shaped iron core is opened downward, of which MR elastomer are set on two inner sides respectively. Vibration absorbing block is set among two chips and the lower end of U-shaped iron core is fixed with the upper end of U-shaped bracket to form inner space where the main drive part, vibration absorbing block, MR elastomer and magnetic insulation block are accommodated. The control method is that the changeably stiffness part and main drive part are controlled respectively according to frequency, amplitude value and phase information of vibration-damping objects. The invention belongs to half-active and active combined control and is provided with low consuming and wide vibration-damping frequency so on.

The invention discloses a MoS2 / carbon fiber network flexible electrode and a preparation method and application thereof. The flexible electrode is formed by wrapping a surface of a three-dimensional carbon fiber network substrate framework with MoS2. The preparation method of the flexible electrode comprises the steps of placing cotton fiber paper in a mixed solution of a molybdenum source and a sulfur source for immersion, and sequentially performing vacuum freezing, drying, calcination and cooling to obtain the flexible electrode. According to the method, the cotton fiber paper is used as a carrier of the sulfur source and the molybdenum source, a three-dimensional porous conductive carbon fiber network structure with flexibility is generated by high-temperature carbonization, meanwhile, in-site growth and loading of the MoS2 are achieved, a current collector, and an adhesive and a conductive agent are prevented from being used during the traditional electrode preparation process; and moreover, the method has the advantages of simplicity, high efficiency and the like, and the obtained MoS2 / carbon fiber network electrode has favorable cycle property, rate performance and flexibility and can be used as a flexible lithium ion battery negative electrode so as to be widely applied in the field of a wearable electrochemical energy-storage or flexible electronic product.

A microbattery comprises, in the form of thin layers, at least first and second electrodes between which a solid electrolyte is disposed. The first electrode and the electrolyte both comprise at least one common grouping of [XY1Y2Y3Y4] type, where X is located in a tetrahedron whose peaks are respectively formed by the chemical elements Y1, Y2, Y3 and Y4, the chemical element X being selected from the group consisting of phosphorus, boron, silicon, sulphur, molybdenum, vanadium and germanium and the chemical elements Y1, Y2, Y3 and Y4 being selected from the group consisting of sulphur, oxygen, fluorine and chlorine.

The invention relates to an electrode for a flexible solid super capacitor. The electrode comprises an active substance, a conductive agent and an adhesive. The electrode is characterized in that the ratio of the active substance to the conductive agent to the adhesive is (70-80):(10-20):(8-18), and an ion-electron conduction polymer film of which the mass is 3-26% of the mass of the active substance is coated on the outer layer of the active substance. According to the invention, the electrode for the flexible solid super capacitor is prepared by coating the active substance with the ion-electron conduction polymer film, and the flexible solid super capacitor with the electrode is an ideal energy storage device for a new energy vehicle; the electrode is flexible, light and thin, is favorable to the assembly design of an energy storage unit and a vehicle and the reduction of the weight of the energy storage unit, and is safe and environmentally-friendly. The electrode for the flexible solid super capacitor has the characteristics that the polymer film which has the conduction properties of both ions and electrons is coated on the active substance, therefore, the property of an interface between the electrode and polymer electrolyte can be improved, contact resistance can be reduced, ion conductance can be improved, and the energy storage capacity of the super capacitor can be further enhanced.

The invention relates to a phase change energy storage microcapsule, which takes n-dodecanol as a phase change material and adopts methyl methacrylate-acrylic acid copolymer as a capsule wall material. Ultrasonic-assisted emulsification is adopted, and interfacial polymerization is employed to perform microcapsule packaging. The preparation method of the phase change energy storage material includes: firstly mixing n-dodecanol with an emulsifier, performing ultrasonic emulsification, then conducting mechanical stirring, adding methyl methacrylate and an initiator under 80DEG C water bath to react for certain time, then adding acrylic acid to react, and completing polymerization; and carrying out cooling, filtering, and drying so as to obtain a sample. According to the invention, n-dodecanol is adopted as the phase change material, the phase change temperature can be controlled in the vicinity of room temperature. The methyl methacrylate-acrylic acid copolymer is taken as the capsule wall, which has very good chemical stability and strong adaptability to the environment. Ultrasonic assisted emulsification is employed to form a miniemulsion, and the reaction undergoes more easily. The phase change energy storage microcapsule material provided by invention has the advantages of simple process, low cost, and good stability, and can effectively improve the energy storage effect of a phase change material.

A bulk amorphous metal inductive device includes a magnetic core having at least one low-loss bulk ferromagnetic amorphous metal magnetic component forming a magnetic circuit having an air therein. The component has a plurality of similarly shaped layers of amorphous metal strips bonded together to form a polyhedrally shaped part. The device has one or more electrical windings and is easily customized for specialized magnetic applications, e.g. for use as a transformer or inductor in power conditioning electronic circuitry employing switch-mode circuit topologies and switching frequencies ranging from 1 kHz to 200 kHz or more. The low core losses of the device, e.g. a loss of at most about 12 W / kg when excited at a frequency of 5 kHz to a peak induction level of 0.3 T, make it especially useful at frequencies of 1 kHz or more.

The inventions relates to a system for conditioning of power from a turbine, the turbine comprising at least one turbine blade (1) connected to a rotating hub (2), the rotating hub (2) is arranged to drive a generator (5). The generator is a multi pole synchronous generator (5) connected via a plurality of galvanic isolated three-phase cables (11) to a multi level frequency converter (25), the generator (5) also being arranged to feed current to the frequency converter (25) through the three-phase cables (11). The multi level frequency converter (25) is constituted by a plurality of elements arranged in columns and coupled in cascading order to add inverted voltage.

The invention relates to a polymer matrix composite and a preparation method thereof. The composite is a laminated film composed of a polyvinylidene difluoride matrix and a nano-fiber material dispersed in the polyvinylidene difluoride matrix. The nano-fiber material is of a core-shell structure, wherein a core layer is made of a ceramic fiber, and a shell layer is an aluminum oxide coating layer. The polymer matrix composite is prepared through the method comprises the following steps: (1) placing the ceramic fiber in mixed solution of aluminum nitrate, polyvinyl pyrrolidone and ethyl alcohol, and after uniform mixing, obtaining the nano-fiber material through sintering; (2) causing the nano-fiber material to undergo surface modification through a coupling agent, then adding the nano-fiber material into mixture of polyvinylidene difluoride and dimethylformamide, performing uniform mixing, pouring the mixture in a casting film machine to form a film through flow-casting, and performing drying to obtain the laminated film; (4) and causing the laminated film to undergo heating and heat insulation, quenching and drying, and obtaining the polymer matrix laminated film. Compared with the prior art, the polymer matrix composite has the advantages that the laminated film is high in energy density, good in energy storage efficiency, simple in preparation process and low in cost.

The invention discloses a hydraulic driving system for an offshore drilling compensation winch.A hydraulic secondary regulation element and a driven hydraulic cylinder jointly drive the winch to fulfill a heave compensation function, and a bit feeding hydraulic motor drives the winch to fulfill an automatic bit feeding function.During compensation, the driven hydraulic cylinder and a liquid-gas energy storage device thereof are used or bearing all static loads of a drilling rig and periodically recovering and releasing gravitational potential energy of loads; the hydraulic secondary regulation element operates in a constant-pressure network to overcome other loads in the compensation process, and the liquid-gas energy storage device periodically recovers and releases inertia kinetic energy of the a winch rotary system.During bit feeding, the driven hydraulic cylinder and the liquid-gas energy storage device thereof recover the gravitational potential energy of the loads of the drilling rig and release in lifting of a drilling rig traveling system.The hydraulic driving system is integrally compact in structure, a hydraulic energy recovery system is high in operation efficiency and long in service life, and an engine is low in power and power consumption.

The present invention relates to the technical field of phase change energy storage, and provides a preparation method for a polyethylene glycol / silicon dioxide / expandable graphite composite shape-stabilized phase change material. The preparation method comprises: firstly, preparing expandable graphite with a microporous structure as a composite material inorganic carrier by adopting a thermal expansion method; then, uniformly mixing molten polyethylene glycol with the inorganic carrier, and dropwise adding silicon dioxide sol prepared by a hydrolysis method into the mixture of polyethylene glycol sol and expandable graphite; and finally, carrying out infiltration, encapsulation, and formalization under a vacuum condition . The preparation method has the effects and beneficial effects that the prepared composite phase change material can ensure high energy storage performance, carries out good encapsulation on a working medium polyethylene glycol and effectively prevents liquid phase leakage; the polyethylene glycol family is wide in working temperature range, so that the applicability is wide; and furthermore, due to the high thermal conductivity of the expandable graphite, the thermal conductivity of the composites is greatly improved. This preparation method provided by the invention is simple in process, stable in performance, and suitable for industrial production.

The inventions relates to a system for conditioning of power from a turbine, the turbine comprising at least one turbine blade (1) connected to a rotating hub (2), the rotating hub (2) is arranged to drive a generator (5). The generator is a multi pole synchronous generator (5) connected via a plurality of galvanic isolated three-phase cables (11) to a multi level frequency converter (25), the generator (5) also being arranged to feed current to the frequency converter (25) through the three-phase cables (11). The multi level frequency converter (25) is constituted by a plurality of elements arranged in columns and coupled in cascading order to add inverted voltage.

A method for fabricating electrode structures within a honeycomb substrate having a plurality of elongated channels is provided that is particularly adaptable for producing an ultracapacitor. In this method, the nozzle of a co-extrusion device simultaneously feeds a current collector along a central axis of one of the channels while simultaneously injecting a paste containing an electrode material so that the interior of the channel becomes completely filled with electrode paste at the same rate that the current collector is fed. Such co-extrusion as performed simultaneously at both sides of the ceramic substrate to rapidly form electrode structures within substantially all the channels of the substrate. The resulting ultracapacitor is capable of storing large amounts of electrical energy per unit volume in a structure which is relatively quick and easy to manufacture.

The invention discloses a ternary composite preparation method for a nanometer sizing phase-change material; a phase-change material is paraffins or fatty acid; expandable graphite is used as a supporter and a heat conductive reinforcing agent of the phase-change material at the same time; and clay is used as a supporter and an organic modified material of the phase-change material at the same time. The preparation method comprises the following steps of: firstly puffing the graphite and carrying out organic treatment on the montmorillonite; then preparing an organic montmorillonite / graphite binary nanometer composite material as follows: uniformly mixing the organic montmorillonite and the expandable graphite, adding a solvent and carrying out ultrasonic treatment so as to obtain a binary nanometer composite material suspending liquid; finally preparing an organic montmorillonite / graphite / phase-change material ternary nanometer compound phase-change material as follows: adding the phase-change material into the prepared binary nanometer composite material suspending liquid, carrying out ultrasonic dispersing treatment for 1 to 2 hours, heating and condensing the refluxed solvent, and carrying out vacuum drying so as to obtain the ternary nanometer compound phase-change material. The obtained material has the advantages of high heat conductivity, stable phase change and good compatibility with building materials and no corrosion.

The present invention relates to composite electrode materials, a preparation method thereof, and an application thereof. The method comprises: metallic oxide and / or hydroxide solution through coordination solution are mixed with carbon materials, the metallic oxide and / or metal hydroxide are grown in situ at the surface of the carbon materials through evaporation of a ligand solution, and the composite electrode materials are obtained. The method provided by the invention is simple to operate, low in cost, green and environmentally friendly without postprocessing, and provides possibility for industrialization large-scale production of the electrode materials. The composite electrode materials prepared by the method are good in electric energy storage. For example, the 5% capacity nickelous hydroxide-active carbon composite electrode materials are prepared by the method, the full electrode quality specific capacity thereof can reach 294F / g, and the active substance specific capacity thereof can reach 4917F / g.

A method for producing a halogenated activated carbon material includes heating a natural, non-lignocellulosic carbon precursor in an inert or reducing atmosphere to form a first carbon material, mixing the first carbon material with an inorganic compound to form a mixture, heating the mixture in an inert or reducing atmosphere to incorporate the inorganic compound into the first carbon material, removing the inorganic compound from the first carbon material to produce an activated carbon material, and treating the activated carbon material with a halogen source to form a halogenated activated carbon material. The halogenated activated carbon material is suitable to form improved carbon-based electrodes for use in high energy density devices.

The invention discloses a preparation method of a silk fibroin aerogel. The silk fibroin aerogel is prepared from domestic silkworm silks, and a silk fibroin water solution is obtained by conducting degumming, dissolving and dialyzing; and the silk fibroin aerogel is prepared by the following steps: 1) concentrating the silk fibroin water solution by conducting room-temperature air blasting or thinning the silk fibroin water solution with the addition of de-ionized water, so that the concentration of the silk fibroin water solution is regulated to be 15-60mg / ml; 2) keeping the silk fibroin water solution in a container and conducting high-speed shearing on the silk fibroin water solution by virtue of a stirrer for 10-60min, so that a great amount of bubbles are formed and the silk fibroin water solution is converted into bubble-shaped liquid; and 3) freeze-drying the bubble-shaped liquid in a die, so that the silk fibroin aerogel is obtained. The aerogel prepared by the invention is quite low in density, and the aerogel has the advantages of being light in mass, high in specific surface area, good in biocompatibility and the like; the aerogel is especially applicable to such aspects as body liquid adsorption, biological dressings, sustained release of drugs, tissue repair and the like; and the aerogel has a broad prospect when used as a bio-medical material.

A three-pole two-layer photo-rechargeable battery has a laminated two-layered structure that includes a solar battery cell, a storage cell, and a common electrode therebetween. The solar battery cell has a structure wherein a photo-electrode, which has a photo-sensitized dye and a semiconductor layer on a conductive substrate with optical transparency, counters via a first electrolytic solution a common electrode that has a catalyst layer on a conductive substrate. The storage cell has a structure wherein the common electrode, which has a first conductive polymer layer on a conductive substrate on a side opposite the catalyst layer, counters via a second electrolytic solution a storage cell counter electrode that has a second conductive polymer layer on a conductive substrate.

A method of manufacturing trenched electrochemical double layer capacitors is provided. One aspect of the method employs state-of-the art processes used in semi-conductor wafer manufacturing such as photolithography etching for creating trenches in the electrodes of the double layer capacitor. Another aspect of the method employs a die-saw process, which is scalable and low-cost. The trenched super / ultra capacitors made by the disclosed methods have the combined advantage of higher energy storage capacity than conventional planar super / ultra capacitors due to the increased surface area and higher power density than commonly used Li-ion batteries due to the faster charging time and higher instantaneous energy burst power. The manufacturing processes also have the advantage of better manufacturability, scalability and reduced manufacturing cost.

The invention discloses a hybrid solid-state supercapacitor based on an oriented carbon nano tube material, which comprises a positive pole, a negative pole and solid-state electrolyte dissepiments between the positive pole and the negative pole. The positive pole is composed of oriented carbon nano tube arrays and polyaniline films directly arranged on a conductive substrate in a compounding manner; the negative pole is composed of the oriented carbon nano tube arrays also directly arranged on the conductive substrate; and the solid-state electrolyte dissepiments are polymer gel or solid-state electrolytes containing H2SO4. Based on the oriented carbon nano tube material, the positive pole and the negative pole are assembled with the solid-state electrolyte dissepiments in an overlapping manner. The hybrid solid-state supercapacitor provided by the invention has the advantages of high energy concentration, high power concentration, high safety, lower cost and no pollution.