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Method for improving hydrogen evolution/hydrogen reabsorption performance of lithium borohydride

A technology of lithium borohydride and performance, applied in chemical instruments and methods, borane/diborane hydride, hydrogen and other directions, can solve the problems of potential safety hazards, low production process yield, etc., and achieves low price and simple process. , the effect of increasing the contact area

Active Publication Date: 2017-12-19
北京鼎浩安捷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the system also has a non-hydrogen-absorbing phase (LiTiO 2 and LiTi 2 o 4 ) formed shortcomings, and TiO 2 The high-pressure hydrothermal preparation process of the microtube matrix has low yield and potential safety hazards

Method used

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  • Method for improving hydrogen evolution/hydrogen reabsorption performance of lithium borohydride
  • Method for improving hydrogen evolution/hydrogen reabsorption performance of lithium borohydride
  • Method for improving hydrogen evolution/hydrogen reabsorption performance of lithium borohydride

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Embodiment 1

[0025] According to the molar ratio of 1:3, the metal nickel and aluminum flakes with a purity of not less than 99.5% are weighed; the nickel flakes and aluminum flakes are smelted into alloys using a high-frequency magnetic levitation induction melting furnace; the smelted block alloys are mechanically crushed into particle sizes Alloy powder less than 300 mesh; measure a certain amount of 5mol / L sodium hydroxide solution in a beaker, and place the beaker in a water bath at 80°C, add the alloy powder into the sodium hydroxide solution and stir, after 1h Washing with deionized water and absolute ethanol in sequence, followed by vacuum drying to obtain the alkali-treated product; weighing lithium borohydride and alkali-treated product according to the mass ratio of 1:5, pouring them into anhydrous tetrahydrofuran solution and stirring, and then The solution was extracted under vacuum to obtain modified lithium borohydride. Depend on figure 1 It can be seen that the modified li...

Embodiment 2

[0027] According to the molar ratio of 1:3, the metal nickel and aluminum flakes with a purity of not less than 99.5% are weighed; the nickel flakes and aluminum flakes are smelted into alloys using a high-frequency magnetic levitation induction melting furnace; the smelted block alloys are mechanically crushed into particle sizes Alloy powder less than 300 mesh; measure a certain amount of 5mol / L sodium hydroxide solution in a beaker, and place the beaker in a water bath at 75°C, add the alloy powder into the sodium hydroxide solution and stir, after 1h Wash with deionized water and absolute ethanol in sequence, and then vacuum dry to obtain the alkali-treated product; weigh lithium borohydride and alkali-treated product according to the mass ratio of 2:5, pour into anhydrous tetrahydrofuran solution and stir, and then The solution was extracted under vacuum to obtain modified lithium borohydride. Depend on image 3 It can be seen that the modified lithium borohydride starts...

Embodiment 3

[0029] According to the molar ratio of 1:3, the metal nickel and aluminum flakes with a purity of not less than 99.5% are weighed; the nickel flakes and aluminum flakes are smelted into alloys using a high-frequency magnetic levitation induction melting furnace; the smelted block alloys are mechanically crushed into particle sizes Alloy powder less than 300 mesh; measure a certain amount of 5mol / L sodium hydroxide solution in a beaker, and place the beaker in a water bath at 85°C, add the alloy powder into the sodium hydroxide solution and stir, after 1h Wash with deionized water and absolute ethanol in sequence, and then vacuum dry to obtain the alkali-treated product; weigh lithium borohydride and alkali-treated product according to the mass ratio of 3:5, pour into anhydrous tetrahydrofuran solution and stir, and then The solution was extracted under vacuum to obtain modified lithium borohydride. Depend on Figure 4 It can be seen that the modified lithium borohydride start...

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Abstract

The invention discloses a method for improving hydrogen evolution / hydrogen reabsorption performance of lithium borohydride, and belongs to the technical field of hydrogen storage materials. The method comprises the following steps: firstly, smelting a nickel sheet and an aluminum sheet with the mol ratio of 1 to 3 into an alloy by adopting a vacuum induction smelting method, and mechanically crushing the alloy into powder with the granularity which is less than 300 meshes; secondly, adding the alloy powder into a sodium hydroxide solution and stirring; after washing with de-ionized water and absolute ethyl alcohol, carrying out vacuum drying to obtain an alkali treated product; finally, weighing the lithium borohydride and the alkali treated product with the mass ratio of (1 to 4) : 5, and pouring into an anhydrous tetrahydrofuran solution and stirring; pumping all the solution in vacuum to obtain modified lithium borohydride. The method for improving the hydrogen evolution / hydrogen reabsorption performance of the lithium borohydride, provided by the invention, has the advantages of wide raw material source, low price, simple technology, safety and reliability; the modified lithium borohydride has low hydrogen evolution temperature, high hydrogen evolution amount and good hydrogen reabsorption performance.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a method for improving the hydrogen desorption / reabsorption performance of lithium borohydride. Background technique [0002] With the increasingly severe energy crisis and environmental pollution, human beings urgently need to develop new energy sources to replace traditional fossil energy sources such as coal, oil and natural gas. Hydrogen energy has the advantages of high calorific value, abundant sources, and clean and non-polluting combustion products. It is considered to be an ideal secondary energy source for human beings in the future, and the development of safe and efficient storage technology is the key to the large-scale application of hydrogen energy. Compared with gaseous and liquid hydrogen storage technologies, the use of hydrogen storage materials for solid-state storage of hydrogen has the advantages of high hydrogen storage densit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/21C01B3/00
CPCC01B3/001C01B6/21Y02E60/32
Inventor 柳东明杨柳王春阳李永涛斯庭智张庆安
Owner 北京鼎浩安捷科技有限公司
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