247results about How to "High hydrogen storage capacity" patented technology

The invention belongs to the technical fields of inorganic material chemistry and new energy, and discloses a method for preparing porous carbon spheres doped with nitrogen and phosphorus and an application. Water serves as a solvent, polyphosphazenes microspheres and activating agents are mixed in a mass ratio of (0.2-2):1, concentration of the polyphosphazenes microspheres is maintained at a level of 10-30wt%, stirring is performed completely, the mixture of the polyphosphazenes microspheres and the activating agents is obtained through centrifugal separation, the mixture of the polyphosphazenes microspheres and the activating agents is subjected to carbonization, and finally the porous carbon spheres doped with the nitrogen and the phosphorus are obtained. The activating agents are potassium hydroxide, sodium hydroxide, calcium chloride or zinc chloride. The polyphosphazenes microspheres serve as a carbon precursor in the method, are synthesized directly under the room temperature condition, and has a simple art process and high productivity. Simultaneously, the activating agents are used for processing polyphosphazenes so as to improve specific surface areas and pore structures of the porous carbon spheres greatly and be beneficial to improve hydrogen storage capacity.

The invention relates to a steel plate and a process method thereof used for producing water heater linear enamel by a flexible thin slab rolling line (FTSR), belonging to the production field of enamel steel plates. The steel plate comprises the following chemical components in percentage by weight: 0.03-0.10wt% of carbon, 0.15-0.40wt% of manganese, less than or equal to 0.06wt% of silicon, 0.004-0.040wt% of sulphur, less than or equal to 0.15wt% of phosphorus, 0.03-0.05wt% of aluminum, 0.002-0.008wt% of nitrogen, 0.02-0.10wt% of titanium and the balance of ferrum and inevitable impurities. The tissue of the water heater linear enamel contains fine grain ferrite and a small quantity of pearlite tissues, and the granularity level of the water heater linear enamel is more than or equal to 10 levels. According to reasonable ingredient design and the FTSR process, steel for manufacturing water-storage water heater linear enamel for home appliances is produced; the steel plate has good enamel adhesion and scaling resistance, and also has the characteristics of few added alloy elements, few production working procedures, low production cost and the like; and a hot rolling scouring plate is used for replacing a cold rolling annealing plate.

The present invention relates to a nano crystal multi-phase mixed rear earth-magnesium system hydrogen-storing alloy and its preparation method. The preparation method of said alloy includes the following steps: smelting, homogenizing annealing, etc. and its smelting process is placing the La-enriched mixed rare earth, metal magnesium and metal nickel into an induction smelting furnace crucible according to a certain proportion, evacuating, charging protective gas, regulating power and temp. to melt metal, heat-insulating and fully stirring, injecting the molten metal into water-cooling ingotmould, cooling and discharging. Said alloy has anique components and multi-phase nano crystal structuer, and has good circulation stability.

The invention discloses a preparation method for MOF-5 metal-organic frameworks of interpenetrating structures. The preparation method comprises the following steps: (1) dissolving Zn(NO3)2.6H2O and H2BDC into a DMF solvent; adding TEA (triethylamine) to produce white precipitate and then filtering, wherein a filtrate is a precursor solution; and (2) heating for 24 to 48 hours at 90 to 110 DEG C to obtain MOF-5 crystals. The preparation method integrates the advantages of a TEA direct mixing method and a solvothermal method. Firstly, a reaction solution with the relatively high concentration is required for preparing the interpenetrating structures, while the reaction solution with the relatively high concentration can damage the MOF-5 seed crystals, and the damage can be avoided by adding the TEA; secondly, the white precipitate produced after the TEA is added is removed, and a remained clarified liquor is reserved for performing reaction, so that the high crystallinity of the MOF-5 crystals is guaranteed; in addition, the TEA is also introduced into intergranular mesoporous, so that the hydrogen storage capacity of interpenetrated MOF-5 is improved. The preparation method disclosed by the invention can also be used for preparing the carbon-material-doped interpenetrated MOF-5. The MOF-5 metal-organic frameworks of the interpenetrating structures, which are prepared by the preparation method, have the high hydrogen storage capacity and the high thermal stability.

The invention belongs to the technical field of standby power source systems of mobile phone signal substations, and particularly relates to a metal hydride hydrogen storage and fuel cell combination system. The combination system comprises a fuel cell system, a metal hydride hydrogen storage system and a water electrolysis hydrogen production system. A metal hydride hydrogen storage tank is arranged in a heat exchange chamber communicated with an exhaust pipeline. When a fuel cell works, the metal hydride hydrogen storage tank heats hydrogen storage alloy powder through hot air exhausted out of the fuel cell to release hydrogen, it is guaranteed that the hydrogen storage alloy powder is located in an effective hydrogen releasing temperature area, and therefore the effective hydrogen releasing amount is made to be the maximum. After hydrogen is introduced into the heat exchange chamber and air cooled by the hydrogen storage alloy powder is fully mixed with fresh air, the air is cyclically provided for the fuel cell, and therefore the cooling performance of the fuel cell can be improved. The method is not limited to an air cooling type fuel cell system, and can be applied to a water cooling type fuel cell system.

The invention relates to a preparation method of RE-Mg-Ni-M based hydrogen storage alloy. Under the protection of inert gases, the as-cast condition products of the RE-Mg-Ni-M based hydrogen storage alloy are smelted through using a cold-crucible magnetic-suspension furnace; heat-treated products are obtained by heat treatment of the as-cast condition products. The method has the steps that: (1) material is prepared; (2) metal Ni and M are smelted together; (3) metal RE is smelted; (4) the casting ingots obtained from step (2) and step (3) are smelted; (5) the ingot obtained from step (4) is overturned and smelted to obtain alloy solution, then master alloy of magnesium is added into the alloy solution to obtain the as-cast condition products of the RE-Mg-Ni-M based hydrogen storage alloy by cooling; (6) heat treatment is carried out to the as-cast condition products to get the heat-treated product. The single weight of the as-cast condition products and heat-treated products is 50-1000g; the content of magnesium in the products is close to designed content; the components of the as-cast condition products are uniform and have high hydrogen storage capacity; the structure and components of the heat-treated products are uniform and also have high hydrogen storage capacity and long cycling life.

The invention belongs to the field of new material technology for hydrogen production, and particularly relates to a multiple-efficiency water purification ceramic material as well as a preparation method and application thereof. The multiple-efficiency water purification ceramic material is prepared from the following raw materials: 30-50 parts of substrate component, 20-40 parts of hydrogen-richcomponent, 2-5 parts of antibacterial component and 3-10 parts of binder; wherein the substrate component is made from tourmaline, Shuiyuan stone, medical stone, calcium oxide and zeolite; the hydrogen-rich component is prepared from metallic magnesium powder, magnesium oxide powder, KDF alloy powder and three-dimensional graphene; the antibacterial component is prepared from far-infrared ceramicpowder, nanometer zinc oxide, titanium oxide and nanometer zirconium dioxide; the binder is prepared from highly pure distilled water, carboxypropyl cellulose and bentonite. The multiple-efficiency water purification ceramic material of the invention can not only produce hydrogen but also store hydrogen when being added to water, and can significantly increase the hydrogen content in the water. The invention also provides the preparation method and application of the multiple-efficiency water purification ceramic material, and the process is simple and easy to implement, and the multiple-efficiency water purification ceramic material is applied to products such as a water purifier, a water filter pitcher and a water cup.

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 an under-measurement Laves phase hydrogen storage alloy and a preparation method thereof. The general chemical formula of the alloy is TiuZrxMnvMyVz, wherein x is more than or equal to 0 and is less than or equal to 0.2; y is more than or equal to 0.1 and is less than or equal to 0.4; z is more than or equal to 0.1 and is less than or equal to 0.5, u plus x is equal to 1, and v plus y is equal to 1.5; the optimal range of y is more than or equal to 0.1 and is less than or equal to 0.2, and the optimal range of z is more than or equal to 0.1 and is less than or equal to 0.3; M element can be Cr, Ni or Cu; and the preparation method comprises the following steps: weighing the alloy according to the blending ratio; repeatedly melting block-shaped pure metal in a magnetic suspension high frequency induction furnace under the protection of argon gas for two times to three times; and annealing the obtained cast alloy for six to eight days at the temperature of 950 DEG C to 1050 DEG C under the protection of inert gas. The invention has the advantages of large hydrogen storage amount, small lag, long platform area and other good comprehensive performances.

The invention provides an Mg-based composite hydrogen storage material containing alkaline earth metals-aluminum hydride and a preparation method thereof, which belongs to the technical field of hydrogen storage material. The chemical general formula of the hydrogen storage material is MgH2+x wt.%(Sr1-yCay)2AlH7+z wt.%TiF3, wherein x is more than or equal to 30 and less than or equal to 50, y is more than or equal to 0 and less than or equal to 0.5, and z is more than or equal to 2 and less than or equal to 10. The hydrogen storage material is gained by mechanically ball milling three materials powder of MgH2, (Sr, Ca)2AlH7 and TiF3, a planetary ball mill is adopted when ball milling, the ball material ratio is 15:1 to 20:1, the rotational speed is 350 to 400rpm, the ball milling time is 10 to 20h, the ball milling protecting atmosphere is argon gas or hydrogen gas, and the atmosphere pressure is 1 to 5atm. The invention has the advantages that: the preparation technique is simple, the provided composite hydrogen storage materials do not need to be activated, and have high hydrogen storage capacity, simultaneously have good low temperature hydrogen absorption dynamic performance and high hydrogen absorption and desorption cycling stability. The invention is applicable to the safe and efficient storage and transportation of the hydrogen, especially the hydrogen fuel cells and other fields.

A hydrogen bearing REMg3 alloy has a molecular formula: RE1.2-xMg3Niy, where RE is rare-earth mixture, x=0-0.4 and y=0-1. Its preparing process includes proportionally loading RE, Mg and Ni in crucible of induction furnace, vacuumizing, filling protective gas, smelting and cooling.

The invention belongs to the technical field of environment-friendly materials and particularly relates to a multifunctional ceramic material as well as a preparation method and application thereof. The multifunctional ceramic material is prepared from the following raw materials in parts by weight: 20-30 parts of zirconium sodium phosphate, 10-30 parts of hydrogen-enriched water porcelain, 5-10 parts of negative ion powder, 20-30 parts of modified shell powder, 3-5 parts of an inorganic antibacterial agent, 1-3 parts of three-dimensional graphene, 5-10 parts of activated carbon, 5-10 parts ofcalcium sulfite and 5-20 parts of a binder, wherein the inorganic antibacterial agent is nano-zinc oxide, cerium oxide, titanium oxide and silver oxide; and the binders are hydroxy propyl cellulose and bentonite. The multifunctional ceramic material has the functions of preparing weak base water, hydrogen-enriched water and negative potential water and further has the efficacies of resisting bacteria, removing chlorine and purifying water. The preparation method has the characteristics of easiness in industrial production and good economic benefit; and the multifunctional ceramic material iswide in application field and can be applied to water purifiers, water purifying kettles, water cups, dish washers and humidifier products.

The invention relates to a material and technology for storing hydrogen, in particular to a novel metal ammonia borane compound hydrogen storage material and a preparation method thereof. The novel metal ammonia borane compound hydrogen storage material is prepared by taking the mixture of ammonia borane NH3BH3 and metal M or metal hydride NHy as an initial raw material and performing ball milling on the raw material in an inert protective atmosphere or a reactive hydrogen atmosphere. The molecular formula of the novel metal ammonia borane compound hydrogen storage material is MxNH(3-nx)BH3, wherein x is more than 0 and less than or equal to 1, and n is more than or equal to 1 and less than or equal to 3. The mole ratio of NH3BH3 to M or NHy in the phase composition of the raw material is 1-50:1. The preparation method provided by the invention has high efficiency and simple and easy operation. The novel metal ammonia borane compound hydrogen storage material provided by the invention has the advantages of high hydrogen storage capacity, low hydrogen production temperature, fast hydrogen production dynamics, no impurities, no gaseous pollutants and the like and has the application prospective of automobile-mounted hydrogen storage.

The invention relates to an mg-based hydrogen storage material, which comprises15 to 25 weight percent of nickel, and 5 to 15 weight percent of cerium contained rare earth elements, the rest is magnesium. The material mainly consists of nano-crystalline; in the nano-crystalline, the grain size of more than 70 percent of crystalline is lower than 10 nm. The invention further relates to a manufacture method of the material.

The invention relates to a method for hydrogen production and storage through catalysis of water splitting by an MOF (metal-organic framework) composite electrode. The method utilizes the unsaturated metal sites and the porous structure of MOF to conduct electrocatalysis on water splitting so as to produce hydrogen, and the produced hydrogen is stored in an MOF porous material on line, thus realizing integration of hydrogen production and storage. The method greatly reduces the hydrogen production overpotential, is simple in operation and is easy to control, storage and release of hydrogen are realized through charge and discharge, the absorption and desorption conditions are mild, the current efficiency is greater than or equal to 75%, and the electrochemical hydrogen storage capacity can reach 920mAh/g. The method provided by the invention realizes synchronization of hydrogen production and storage, and greatly promotes the research and industrialization process of the water splitting technology for hydrogen production and storage.

The present invention relates to the preparation process and device of Mg-based hydrogen storage materials in homogeneous high magnetic field. In this process metal powder is mixed as the designed chemical composition, dispersed by ultrasonic, dried, compacted and fragmented; then it is placed in the reaction kettle that is vacuumized and charged with hydrogen; then in homogeneous high magnetic field of 1-14T it is heated to 400-750DEG C slowly and the temperature is preserved, the hydrogen storage alloy is obtained after cooling. The special device in the present invention features that it includes generating system of homogeneous high magnetic field and reaction kettle for high temperature and pressure. This invention decreases the dehydriding temperature of the Mg-based hydrogen storage material while increases its absorbing and releasing rates of hydrogen.

The invention relates to a method applicable to a palladium-modified metal electrode with foamed nickel materials as bases. The method comprises the steps that an oxidation layer and oil fouling on the surface of the foamed nickel base materials are removed; bivalent cobalt salt and sodium salt are used for preparing electro-deposition liquid, an inert graphite electrode is used a positive electrode, the foamed nickel base materials are used as a negative electrode, electro-deposition is performed with constant temperature and constant current for preparing a Co/foamed nickel electrode, and drying is performed; the Co/foamed nickel electrode is placed in a tube type resistance furnace, the temperature is increased at a constant speed till reaching the preset value, constant-temperature calcination is performed, and then the Co3O4/foamed nickel electrode can be obtained; and H2PdC14 impregnation-deposition liquid is prepared, the Co3O4/foamed nickel electrode is placed in the impregnation-deposition liquid, the impregnation-deposition liquid is shaked in a table concentrator till the impregnation-deposition liquid becomes colorless, and therefore a Pd/Co3O4/foamed nickel electrode is obtained. The hydrogen-evolution potential of the electrode can be lowered, the hydrogen production and storage capability of the system are improved, and it is ensued that electrocatalytic reduction and degradation are rapidly and efficiently performed on halogenated organic matter.

The invention belongs to the field of carbon material, and relates to a graphene-based carbon fiber high in strength and hydrogen storage capacity, and a preparation method thereof. The fiber main body of the graphene-based carbon fiber high in strength and hydrogen storage capacity is composed of graphene and amorphous carbon, wherein the weight amount of graphene accounts for 60 to 100% of the weight amount of the fiber main body; the fiber main body may also be loaded with carbon nanotube, the fiber main body, or the fiber main body and the carbon nanotube grows on the fiber main body are modified with metal particles; when the total weight amount of the graphene-based carbon fiber is taken as 100wt%, the content of the metal particles ranges from 0 to 30wt%, and the content of carbon nanotube ranges from 0 to 300wt%. The graphene-based carbon fiber is prepared through following steps: oxidized graphene based initial fiber is prepared through spinning of a spinning solution preparedthrough mixing of an oxidized graphene aqueous solution and a polymer solution based on solution spinning method, and the initial fiber is subjected to carbonization so as to obtain a finished product. The preparation method is simple; the performance is excellent; and the graphene-based carbon fiber can be taken as a hydrogen storage material, and can be used in the fields such as new energy automobile.

The invention provides a method for improving a hydrogen storage property of lithium borohydride, and belongs to the technical field of hydrogen storage materials. The method comprises the following steps of: mixing the lithium borohydride and alkaline-earth metal alanate according to the molar ratio of 2:1-10:1 under the protection of vacuum or inert gases, and heating mixed powder of the lithium borohydride and the alkaline-earth metal alanate to a certain temperature to ensure that the alkaline-earth metal alanate is decomposed into alkaline-earth metal hydride, aluminum or aluminum alloy in advance. By the method, double effects of in situ and concerted catalysis in the process of discharging and absorbing hydrogen of the lithium borohydride by using the alkaline-earth metal alanate are achieved, so that a hydrogen discharging temperature of the lithium borohydride is greatly reduced, and the hydrogen absorbing and discharging dynamic properties of the lithium borohydride are improved. The method is suitable for storing the hydrogen safely and efficiently and is particularly applied in fields of hydrogen fuel cells and the like.