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

The invention is about Mg-base hydrogen storage material and the method of the procedure. It has the chemical composition of Mgp-xMxNi-yNy-NieBf, M has the alternative of Al, Mn, Sn, Ca, Li, B, Na, B, Na, K, La, Ce, Nd, Pr, Y and misch metal. N has the alternative of V, Cu, Ti, Co, Fe, Ag, Cr, Zr, Se, Nb, Mo, W, Nb, C, Si and Sn, 1.0 <=p<=2.5, 0<=x<=1.0, 0<=y<=0.8, 1<=e<=3, 1<=f<=3. It has a good property under normal temperature and pressure, the electric pole that made by it has a high galvano-chemistry capability and cycle life. Its advantages include stable property; low price; extensive use of Ni-H battery, H accumulator, H power auto and fuel battery.

The invention provides a solid hydrogen storage device. A cylinder is internally connected with a heat conductive sheet; a hydrogen inlet valve and a hydrogen outlet valve are respectively connected with the exteriors of the two ends of the cylinder; a filter passes through the central hole of the heat conductive sheet; two ends of the filter are respectively connected with the hydrogen inlet valve and the hydrogen outlet valve; the cylinder is internally provided with a snake-shaped water circulation pipe which is arranged longitudinally along the cylinder and is connected with the heat conductive sheet; the heat conductive sheet is connected with a sheet-shaped crossing. Large holes are uniformly distributed along 2/3 of the radius of the heat conductive sheet; small holes are uniformly distributed along 1/3 of the radius of the heat conductive sheet; the sheet-shaped crossing is horizontally arranged between the large holes and the small holes of the heat conductive sheet; the snake-shaped water circulation pipeline passes through the heat conductive sheet and deviously passes through the large holes in 120 DEG on the heat conductive sheet with an arc ranging from 30-90 DEG; the water outlet and the water inlet of the snake-shaped water circulation pipe are respectively arranged at the end plates of the two ends of the cylinder.

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.

The invention provides an amorphous magnesium-yttrium-transition metal hydrogen storage material and a preparation method thereof, belonging to the technical field of hydrogen storage materials. The content of Mg in the hydrogen storage material is 70-90at.%, the transition metal is Co, Ni and Cu, and the yttrium and the transition metal are added in a combined addition manner based on the mol ratio of 1 to 1. The preparation method comprises the steps of: firstly, melting and preparing intermediate alloy of the yttrium and the transition metal by using an induction melting furnace; secondly, remelting and rapidly quenching the metal Mg and the intermediate alloy of the yttrium and the transition metal in a vacuum single-roller liquor rapid quenching furnace, wherein the prepared material is an amorphous ribbon with the width of 3mm and the thickness of 30-50 microns; and grinding the prepared amorphous ribbon into powder with different granularities in a glove box, wherein the amorphous ribbon or powder is the finished products of hydrogen storage materials. In the invention, the provided hydrogen storage material overcomes the disadvantage of low hydrogen storage amount; the combined addition of the Y and the transition metal facilitates the formation of the amorphous body and improves the hydrogen storage performance of the material. In addition, the invention has the characteristics of simple preparation method and low cost.

The invention relates to a preparation method of a zeolite composite magnesium base hydrogen storage material, and belongs to the field of preparation of hydrogen storage materials. Firstly, FeCl2 is dehydrated, grinded and sieved; then, dried dimethylformamide is mixed, and is added with magnesium powder for heating, stirring and extracting; filter cakes are collected, and are washed by using the dried dimethylformamide and acetone; then, the washed filter cakes are dried, activated, pressurized, insulated and cooled to room temperautre, and perform ball milling with zeolite molecules in a ball milling machine to prepare zeolite composite Mg2FeH6 powder; and the zeolite composite Mg2FeH6 powder is put in a hydrogen activation reaction kettle for hydrogen treatment. The preparation method has the following beneficial effects: the prepared zeolite composite magnesium base hydrogen storage material quickens the hydrogen sucking and releasing speed, and is prominent in dynamics performance when keeping higher hydrogen storage quantity; the hydrogen releasing quantity is 2.3-4.8 wt.%; and the practical development of the magnesium base hydrogen storage material is promoted.

Hot alkali treatment affects the electrochemical performances of La-Mg-Ni serial A2B7 type hydrogen storage alloy electrodes. The hot alkali treatment is carried out after alloy melting annealing, so the content of nickel in the surfaces of alloy particles increases with the dissolving of La, Mg, Al and other elements in a surface layer to realize strong activation performances.

The invention relates to a manufacturing method of a metal-hydride hydrogen storage tank. The method includes the steps of machining of a tank body, machining of a flange cover, machining of foam copper elements, preparation of hydrogen storage alloy powder and assembly line assembling and production of the hydrogen storage tank. The hydrogen storage tank comprises parts including a round foam copper cover, a mat type copper net, a clamping sleeve type ball valve, an air pipe, a UJR joint, the flange cover, bolts, an O-shaped sealing ring, cooling fins, the tank body, the hydrogen storage alloy powder, a foam copper drum, a foam copper disk, a copper-water heating pipe, a foam copper cylinder and the like. The manufacturing method is high in production efficiency, high in yield and low inmanufacturing cost, the metal-hydride hydrogen storage tank manufactured with the method is simple in structure, high in space utilization rate, large in hydrogen storage amount, good in sealing performance, excellent in heat and mass transfer performance, high in hydrogen absorption and release speed and good in long-time use safety, breakage of the tank body due to hydrogen absorption expansionof a hydrogen storage material can be avoided, no cooling media are required to be introduced, repeated recycling can be realized, and the use cost is low.

The invention provides a preparation method for a Mg-based hydrogen storage nanowire. The preparation method comprises the following steps that metal Mg, metal Ce, metal La, metal Gd, metal Li and metal Ni are prepared, batching and vacuum melting are carried out, and a Mg-based alloy ingot is obtained; the Mg-based alloy ingot is atomized, and Mg-based alloy powder is obtained; heat treatment iscarried out on the Mg-based alloy powder; ball milling is carried out on the heat-treated Mg-based alloy powder, and the ball-milled Mg-based alloy powder is obtained; PAN is dissolved in DMF, and a PAN spinning solution is obtained, wherein the PAN concentration ranges from 10 wt% to 15 wt%; the Mg-based alloy powder subjected to heat treatment but not ball milling treatment is dissolved in the PAN spinning solution, and a first spinning solution is obtained; the Mg-based alloy powder subjected to ball milling treatment is dissolved in the PAN spinning solution, and a second spinning solutionis obtained; and the first spinning solution and the second spinning solution are formed into the Mg-based hydrogen storage nanowire by a coaxial electrostatic spinning method. By the adoption of thepreparation method for the new hydrogen storage material. The alloy prepared by the preparation method has larger hydrogen storage amount and higher hydrogen absorption and release speed.

A synthetic method of Mg-based hydrogen storage alloy is designed to solve technical problems of high hydrogen absorption and desorption temperature, low hydrogen absorption and desorption speed, less charge and discharge capacity, and poor corrosion resistance of currently synthesized Mg-based alloy. The method prepares (M40Al60)90Ni10 hydrogen storage alloy by controlling alloy components and ball milling time, and the method is realized by the following steps: proportionally mixing pure Mg, pure Al and pure Ni with a particle size of more than 100 microns and a mass ratio of not less than 99.99%, performing ball milling in a ball milling tank of a high-energy ball mill with a mass ratio of balls and the materials of 10:1; vacuumizing the ball milling tank firstly, then introducing argon; shutting down for 30 min after ball milling for every 1 hour, wherein the total time for ball milling is 10 hours, so as to obtain the (M40Al60)90Ni10 hydrogen storage alloy which is provided with a Ml2Al3 new phase. The beneficial effect is that: the synthetic method has low requirements for the hydrogen absorption and desorption temperature, increases the hydrogen absorption and desorption speed, and enhances the reaction dynamic and thermodynamic performance; the discharge capacity determined in a 6 mol/L KOH solution is 316.7 mAh/g, and the corrosion current density is 2.84*10<-5> Amp/cm2; and the charge and discharge capacity and the corrosion resistance of the Mg-based hydrogen storage alloy are obviously increased.

It relates to a magnesium or oil coke nanometer composite hydrogen storing material. The material is made oil coke with 30wt%-60wt% grain size 10-100nm, 2wt%-15wt% catalyst Cu,Al,Fe,Co, Ni,Pd,Mn, either one of them or several with the combination of magnesium. It bakes oil coke and catalysts in 660-1600DEG C temperature for one hour, ball grinding with magnesium powder in 0.5-3MPa hydrogen for 0.5-5 hours. It features in the high density of hydrogen of the material, with moderate hydrogen drawing and releasing, low cost in material and simple making process.

The invention discloses an alloyed powder surface processing method for a power battery. The method comprises the steps as follows: a first step of processing large granular alloy blocks into alloy powder with a needed grain diameter for surface processing; a second step of contacting the alloy powder for surface processing, which is obtained in the first step, with an alkali treatment solution mixed with a reducing agent, performing high-temperature treatment on the obtained mixture, and washing the heated product until the pH value of washing liquor is about 7. The alloy powder surface processing method for the power battery of the invention overcomes the defects in high-rate discharge performance and cycle life of NI-MH power batteries in the prior art. The alloy powder surface processing method for the power battery of the invention is simple, comprehensive and effective in treatment process, and improves high-rate discharge performance and cycle life performance of the NI-MH power batteries.

The invention discloses a preparation method of a surface microporous nickel-plating hydrogen-storage alloy. The preparation method of the surface microporous nickel-plating hydrogen-storage alloy comprises the following steps of (1) smelting; (2) preparing a hydrogen-storage alloy thin strip; (3) carrying out surface microporous treatment; (4) fluorinating; and (5) plating nickel. According to the preparation method provided by the invention, the binding force of a surface coating of the hydrogen-storage alloy and the surface of the alloy can be effectively improved, so that the coating is tightly combined to the surface of the hydrogen-storage alloy, and the cycling stability, the discharge capacity, the high-rate discharge performance and other electrochemical performances of the hydrogen-storage alloy are comprehensively improved.

The invention discloses a method for manufacturing a hydrogen supply device and belongs to the field of hydrogen supply. The device comprises an air inlet coil pipe, a cabinet, two 0.5 mu m filters, two check valves, two pressure gauges, two ball valves, a fin heat dissipation pipe, a safety valve, a hydrogen pressurization tank, a thermocouple, a temperature controller, a silica gel heating sleeve, a heat preservation sleeve, a magnesium silicate fiber ball, a hydrogen storage tank, a support and an air outlet coil pipe. The manufacturing process of the hydrogen supply device mainly starts from commercially available parts and raw materials and comprises the steps of machining of an air inlet/outlet coil pipe, machining of a cabinet, machining of a hydrogen pressurizing tank, machining ofa hydrogen storage tank, machining of a support and assembling production of the hydrogen supply device. The invention is high in production efficiency, high in safety, low in cost, capable of purifying hydrogen and providing hydrogen of 1-20 MPa, free of vibration noise, small, exquisite, light and particularly suitable for hydrogen supply of laboratory instruments.

The chemical components of the magnesium-base hydrogen storage material is La2-xMxMg17, in which M is selected from Cu, al, Ni, Fe, Co, Mn, V, Cr, Zn, Ca and Sn etc..., and 0<x<2. its production steps are: 1) preparing alloy La2-xMx by using traditional smelting method; 2) La2-xMx alloy and Mg powder are ball-milled under the atmosphere of hydrogen and argon gas. Said ball-mill procedure is conducted under the protection by hydrogen at 0.3-20.0. MPa to make the material preparation and hydrgenation procedure completed in one time.