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Magnesium-based nano composite hydrogen storage material and preparation method thereof

A hydrogen storage material, nanocomposite technology, applied in chemical instruments and methods, hydrogen, borane/diborane hydride, etc., can solve the limitations of large-scale application of magnesium-based hydrogen storage materials, hydrogen storage thermodynamics and kinetics Poor performance and other problems, to achieve the effect of improving the kinetic performance of hydrogen absorption and desorption, improving the purity, and changing the crystal structure

Inactive Publication Date: 2018-03-06
常州富思通管道有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a magnesium-based nanocomposite hydrogen storage material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Take 0.2 mol sodium borohydride and 0.1 mol magnesium chloride into the ball milling tank, under argon atmosphere, ball mill at 300r / min for 20 hours, then add 300 mL of anhydrous ether, continue ball milling for 20 hours, filter the filtrate after ball milling, and place the filtrate On a rotary evaporator, evaporate to dryness under reduced pressure, then place the product in a vacuum drying oven, and dry at 150°C for 10 hours to obtain magnesium borohydride. Take 0.01 mol of magnesium borohydride and put it into a ball milling tank. Next, use the ball milling method of positive and negative alternating ball milling for 10 hours, that is, after running for 60 seconds, pause for 15 seconds and then run in the opposite direction. After the ball milling is completed, the hexaammine magnesium borohydride is obtained. Put it into the ball milling tank and mill for 10h under argon atmosphere with positive and negative ball milling, that is, after every 60s, pause for 15s and ...

example 2

[0024] Take 0.3 mol sodium borohydride and 0.1 mol magnesium chloride into the ball milling jar, under argon atmosphere, ball mill at 400r / min for 22 hours, then add 400 mL of anhydrous ether, continue ball milling for 22 hours, filter the filtrate after ball milling, and place the filtrate On a rotary evaporator, evaporate to dryness under reduced pressure, then place the product in a vacuum drying oven and dry at 200°C for 15 hours to obtain magnesium borohydride. Take 0.01 mol of magnesium borohydride and put it in a ball milling tank. Next, the ball milling is carried out by the positive and negative alternating ball milling method for 11h, that is, after running for 90s, it will pause for 20s and then run in the opposite direction. After the ball milling is completed, the hexaammine magnesium borohydride is obtained. Put it into the ball milling tank and mill for 11h under argon atmosphere with positive and negative ball milling. That is to say, after every 90s, it will pau...

example 3

[0026] Take 0.4 mol sodium borohydride and 0.2 mol magnesium chloride into the ball milling jar, mill it at 500r / min for 24h under argon atmosphere, add 500mL anhydrous ether, continue ball milling for 24h, filter the filtrate after the milling is completed, and place the filtrate On a rotary evaporator, evaporate to dryness under reduced pressure, and then place the product in a vacuum drying box and dry at 250°C for 20 hours to obtain magnesium borohydride. Take 0.02 mol of magnesium borohydride and put it into a ball milling tank. Next, the ball milling is carried out by the positive and negative alternating ball milling method for 12h, that is, after running for 120s, it will pause for 30s and then run in the opposite direction. After the ball milling is completed, hexaammine magnesium borohydride is obtained. Put it into the ball milling tank and use the positive and negative ball milling method for 12h under argon atmosphere, that is, after running for 120s, pause for 30s ...

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Abstract

The invention relates to a magnesium-based nano composite hydrogen storage material and a preparation method thereof and belongs to the technical field of functional materials. The temperature requirement of application is met by forming an ammoniated hydroboron by magnesium hydroboron and ammonium, and positive hydrogen energy introduced into a NH3 group can be combined with negative hydrogen ina BH4<-> group to release hydrogen, so that the hydrogen release path of the hydroboron is changed and release of impurity gas such as boroethane is reduced effectively; the ammonium complexing quantity is changed by means of an ammonium re-distributing method to prepare mono-ammoniated magnesium hydroboron, that is, the combining efficiency is the highest from the aspect of charge balance by adjusting the quantities of positive and negative hydrogen in ammoniated magnesium hydroboron, release of ammonia in a decomposing process of the magnesium hydroboron ammonate can be inhibited effectively, the purity of hydrogen released is improved, and meanwhile, the magnesium-based nano composite hydrogen storage material is combined with a magnesium-based alloy, so that the crystal structure of analloy hydride is changed and a catalytic effect role is played, and therefore, diffusion of hydrogen atoms is facilitated, and the kinetic performance of absorbing and releasing hydrogen by the alloyhydride is improved.

Description

Technical field [0001] The invention relates to a magnesium-based nanocomposite hydrogen storage material and a preparation method thereof, and belongs to the technical field of functional materials. Background technique [0002] Among the many new energy sources, hydrogen energy is called the ultimate clean energy for mankind due to its rich resources, extremely high energy density and mass ratio, environmental friendliness, good combustion performance, diverse storage forms, and high potential economic benefits. It is expected to become the ultimate clean energy for mankind. One of the most important new energy sources in the world energy stage. The ideal hydrogen cycle involves four links: hydrogen production, storage, transportation and application. There are several key problems in the development and application of hydrogen energy: hydrogen production technology, hydrogen storage and transportation technology and hydrogen application. [0003] Excellent hydrogen storage all...

Claims

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Application Information

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IPC IPC(8): C01B3/00C01B6/21
CPCC01B3/0078C01B6/21Y02E60/32
Inventor 刘芳伊王文新陈倩
Owner 常州富思通管道有限公司
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