Method for preparing high-capacity composite hydrogen storage material calcium borohydride/lithium borohydride ammine

A technology of lithium borohydride and calcium borohydride, which is applied in the field of hydrogen storage technology and new material synthesis, can solve the disadvantages of refuel cells and other problems, and achieve the effects of moderate cost, simple preparation process and easy realization

Inactive Publication Date: 2011-09-28
FUDAN UNIV
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Problems solved by technology

However, a large amount of ammonia and hydrogen are also released during its pyrolysis process, which is very unfavorable for its application in fuel cells

Method used

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  • Method for preparing high-capacity composite hydrogen storage material calcium borohydride/lithium borohydride ammine
  • Method for preparing high-capacity composite hydrogen storage material calcium borohydride/lithium borohydride ammine
  • Method for preparing high-capacity composite hydrogen storage material calcium borohydride/lithium borohydride ammine

Examples

Experimental program
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Embodiment 1

[0035] Example 1: At room temperature 25°C, 1g LiBH 4 Put it into a Schlenk test tube under argon gas. After vacuuming the test tube, slowly introduce ammonia gas. Stop feeding ammonia gas when it reaches 0.8 atm. After 20 minutes of reaction, pump the test tube to a vacuum state, and stop after 3 hours of vacuum. Reaction, the product is taken out in argon to obtain LiBH 4 ·NH 3 . Take 0.50g LiBH in the glove box 4 ·NH 3 with 0.90g Ca(BH 4 ) 2 Mix, put into a ball mill jar, seal and take out the ball mill. The ball milling conditions are: the number of revolutions is 400-450 rpm, with stainless steel ball milling balls, the diameter is 0.5-2cm, the ball milling time is 1 hour, the operation mode is alternate restart, and the alternate time is 6 minutes. After ball milling, Ca(BH 4 ) 2 / LiBH 4 ·NH 3 . Mass spectrometry and volumetric tests were performed on the ball-milled samples, and the test results were as follows: figure 1 Shown, raw material, the high-resol...

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Abstract

The invention relates to a method for preparing a high-capacity composite hydrogen storage material calcium borohydride / lithium borohydride ammine (Ca(BH4)2 / LiBH4.NH3), which comprises the following steps of: mixing calcium borohydride and lithium borohydride ammine in a molar ratio of 1:1, and grinding or ball-milling in inert gas to obtain the required product. The Ca(BH4)2 / LiBH4.NH3 serving asa novel high-efficiency hydrogen storage material has high hydrogen release property, can slowly release hydrogen when heated to the temperature of 80 DEG C, and can release 12.3 weight percent of high-purity hydrogen before being heated to the temperature of 250 DEG C.

Description

technical field [0001] The invention belongs to the field of hydrogen storage technology and new material synthesis, and in particular relates to a preparation method of calcium borohydride / monoammine lithium borohydride, a high-capacity composite hydrogen storage material. Background technique [0002] Hydrogen is a clean fuel. Hydrogen energy is recognized as an ideal energy source for the future of mankind. The most critical link in the utilization of hydrogen energy is the storage of hydrogen energy. The storage of hydrogen is the bottleneck of the current development and utilization of hydrogen energy. There are three storage methods for hydrogen: high-pressure gaseous storage, low-temperature liquid storage, and solid-state storage. Among them, high-pressure gaseous storage or low-temperature liquid storage cannot meet the hydrogen storage goals in the future. Solid-state hydrogen storage is to store hydrogen in solid-state materials through chemical or physical adsor...

Claims

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Application Information

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IPC IPC(8): C01B3/02
Inventor 余学斌唐子威郭艳辉
Owner FUDAN UNIV
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