34results about How to "Fast hydrogen absorption and desorption" patented technology

The invention belongs to the field of hydrogen storage materials, and relates to a hydrogen storage high-entropy alloy taking a body-centered cubic structure as the principal thing and a preparation method for the hydrogen storage high-entropy alloy. A component expression formula of high-entropy alloy is as follows: (TiaZrbNbc)xMy, wherein a is greater than or equal to 5at% and smaller than or equal to 35at%, b is greater than or equal to at5% and smaller than or equal to 35at%, c is greater than or equal to 5at% and smaller than or equal to 35at%, a+b+c is equal to x, x is greater than or equal to 15at% and smaller than or equal to 100at%, M is any one or more of Hf, Fe, Co, Cr, Mn, Ni, Mo and W; and atomic percent of each M is 0-35%, and x+y is equal to 100. The preparation method for the hydrogen storage high-entropy alloy comprises the following steps of: adopting a non-consumable vacuum electric-arc furnace to smelt to prepare alloy; and adopting suction casting to sucking alloy into a water-cooling cooper mould, thereby obtaining a high-entropy alloy rod. The high-entropy alloy has high hydrogen storage capacity (3 mass% or more) and excellent hydrogen absorption and desorption dynamic performances; when hydrogen absorption and desorption amount is great, the high-entropy alloy, in comparison with a pure element, does not need to completely purify, so that cost can be saved to a great extent. The hydrogen storage high-entropy alloy taking the body-centered cubic structure as the principal thing has the characteristics of the high-entropy alloy, and has a wide application prospect in the fields of new energy resources and transportation.

The invention discloses an AB5 type rare earth hydrogen storage alloy for tritium storage in the field of hydrogen storage alloys and a preparation method thereof. The composition formula of the alloy is La1-xMgxNi5-yMy, wherein M is Mn or Al, and 0<x ≤0.2, 0<y≤1.2. The hydrogen storage alloy of the present invention is smelted in three steps by using a vacuum magnetic levitation induction smelting furnace, through the spatial placement sequence of the raw material metal in the water-cooled copper crucible, and the method of wrapping the Mg block with Ni foil, and finally packaging it in a quartz In the tube, it is obtained by heat treatment at 900-1100°C for 4-10 hours and then cooling with the furnace. The alloy has a simple production method, less Mg volatilization, stable composition, easy activation, low platform pressure, small hydrogen absorption and desorption hysteresis, and good hydrogen absorption and desorption kinetic properties, and is suitable for tritium storage.

The invention provides a method for preparing Mg-based hydrogen storage nanowires, comprising the following steps: preparing metal Mg, metal Ce, metal La, metal Gd, metal Li and metal Ni, and performing batching and vacuum melting to obtain a Mg-based alloy ingot ; Atomize the Mg-based alloy ingot to obtain Mg-based alloy powder; heat-treat the Mg-based alloy powder; ball mill the heat-treated Mg-based alloy powder to obtain the ball-milled Mg-based alloy powder; dissolve PAN in DMF In the process, the PAN spinning solution is obtained, wherein the PAN concentration is 10-15wt%; the Mg-based alloy powder that has been heat-treated but not ball-milled is dissolved in the PAN spinning solution to obtain the first spinning solution; the ball-milled The Mg-based alloy powder is dissolved in the PAN spinning solution to obtain a second spinning solution; and the first spinning solution and the second spinning solution are formed into Mg-based hydrogen storage nanowires by coaxial electrospinning. The invention proposes a new method for preparing a hydrogen storage material. The alloy prepared by the method of the invention has a larger total amount of hydrogen storage and a faster rate of hydrogen absorption and desorption.

The invention discloses a magnesium-based hydrogen storage material with room-temperature hydrogen absorption and a preparation method of the magnesium-based hydrogen storage material. The preparationmethod comprises the following step: in the presence of an inert gas or a hydrogen atmosphere, carrying out ball milling on MgH2 with an N-doped niobium oxide-based catalyst, thereby obtaining the magnesium-based hydrogen storage material with room-temperature hydrogen absorption, wherein the mass ratio of the MgH2 to the N-doped niobium oxide-based catalyst is (10-150):1, and the mole ratio of an N element to an Nb element is (0.005-0.15):1. Compared with a niobium oxide-based catalyst which is free of N doping, the magnesium-based hydrogen storage material which is prepared by introducing the N element into the niobium oxide-based catalyst and by carrying out ball milling with MgH2 is excellent in catalytic activity, is capable of further improving the hydrogen absorption and release performance of a magnesium-based hydrogen storage material and remarkably reducing hydrogen absorption and release temperatures, and can be completely hydrogenated at the room temperature; and in addition, a rapid hydrogen absorption and release speed and high circulation stability of the magnesium-based hydrogen storage material are kept, and the hydrogen storage capacity is kept at 6.0wt% or above.

The invention discloses a method for preparing Li-Mg-N-H hydrogen storage material. The mixture of the nitride or amino-compound of Li and Mg, the nitride or amino-compound of Mg is loaded in a stainless steel tank and evenly blended by a mechanical mixing or mechanical ball milling way; the evenly blended mixture is loaded in a sintering furnace, the sintering furnace is vacuumized or charged with inert gases and is heated to the temperature range from 250 to 350 DEG C for heat preservation and then the Li-Mg-N-H hydrogen storage material is obtained; the Li-Mg-N-H hydrogen storage material is loaded into a ball milling tank and undergoes ball milling process on a ball mill, and the grain diameter of the sample powder processed with ball milling is smaller than 100nm. The preparation method has simple operation, easy control and low cost. The Li-Mg-N-H prepared and processed by the invention has high hydrogen storage capacity, low working temperature and high speed of hydrogen absorbing and discharging and good reversibility, thus being the hydrogen storage material with excellent performance and being suitable for the storage and transportation of hydrogen.

The invention relates to a metal hydride hydrogen compression device with a heat source and a manufacture method thereof. The manufacture method is characterized in that the metal hydride hydrogen compression device is heated by self under the condition of no additional heat sources, and then the metal hydride hydrogen compression device adsorbs hydrogen at the room temperature and discharges high-voltage hydrogen at high temperature. The device comprises a hydrogen compression part with metal hydride and a heat source part, wherein a phase change energy storage material in the heat source part is subjected to temperature raising and phase change and stores heat under the heating condition, and heat is provided for the metal hydride in the hydrogen compression part; then, the metal hydride releases hydrogen at a certain temperature range of 50-300DEG C in more than two hours; and the hydrogen release pressure is between 10MPa and 100MPa.

A process for preparing the Mg compounded carbon nano-tube material as hydrogen-bearing material includes such steps as loading Mg powder, carbon nano-tube and anthracene into reactor under protection of inertial gas, adding tetrahydrofuran, reaction while electromagnetic stirring, ordinary-pressure distilling and thermal decomposing. It has high activity and high hydrogen absorbing and releasing performance.

The invention discloses a hydrogen refueling station with an industrialized high-pressure composite metal hydride hydrogen storage system as a hydrogen source, which is composed of a container, a hydrogen charging system and a cooling system. The container is composed of a group of high-pressure composite metal hydride hydrogen storage tanks; the hydrogen filling system consists of solenoid valves, filters, discharge ball valves, pressure reducing valves, safety valves, pressure sensors, temperature sensors, flow controllers , one-way valve and other components. The cooling system is composed of water pump, radiator, temperature sensor, cooling water tank, ball valve and so on. The industrialized high-pressure composite metal hydride hydrogen storage system has the advantages of high volume hydrogen storage density, good dynamic performance, and low applicable temperature, and provides an effective hydrogen source solution for hydrogen refueling station technology. The hydrogen refueling station has a compact structure and is easy to operate. It can charge multiple metal hydride hydrogen storage bottles at the same time, meeting the needs of large-scale industrialization of hydrogen energy forklifts, motorcycles and bicycles with metal hydride hydrogen storage tanks as hydrogen sources. .

The invention relates to a manufacturing method of a metal hydride hydrogen storage tank, which includes processing of a tank body, processing of a flange cover, processing of a foamed copper element, preparation of hydrogen storage alloy powder, assembly and production of a hydrogen storage tank; the hydrogen storage The tank includes foam copper round cover, mat-type copper mesh, ferrule-type ball valve, air pipe, UJR joint, flange cover, bolts, O-ring, cooling fins, tank body, hydrogen storage alloy powder, foam copper cylinder, Copper foam discs, copper-water heat pipes, copper foam cylinders and other parts. The manufacturing method has high production efficiency, high yield, and low manufacturing cost. The metal hydride hydrogen storage tank prepared by the method has the advantages of simple structure, high space utilization rate, large hydrogen storage capacity, good sealing performance, and good heat and mass transfer performance. Excellent, fast hydrogen absorption and desorption, good long-term use safety, no rupture of the tank due to hydrogen absorption and expansion of hydrogen storage materials, no need for cooling medium, can be recycled many times, and low cost of use.