A metal aminoborane composite hydrogen storage material

A technology of aminoborane and hydrogen storage materials, applied in the direction of non-metallic elements, hydrogen, inorganic chemistry, etc., can solve the problems of high dehydrogenation temperature, slow dehydrogenation kinetics, slow dehydrogenation kinetics, and slow dehydrogenation process, achieving The effect of simple process and high preparation efficiency

Active Publication Date: 2022-05-27
GRIMAT ENG INST CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

However, there are still high dehydrogenation temperatures, slow dehydrogenation kinetics and harmful by-products in the dehydrogenation process to be used in actual production applications. At present, the widely used method to improve the dehydrogenation performance of ammonia borane is to hydrogenate it by adding alkali / alkaline earth metals. However, the dehydrogenation temperature of the hydrogen storage system obtained by this method is still relatively high, and there is still a small amount of NH in the dehydrogenation product. 3 , B 2 h 6 other impurity gases
In addition, the effect of catalytic hydrogen desorption is achieved by adding transition metals and their alloys, but since the catalytic additives do not participate in the hydrogen desorption of the system, the hydrogen storage density decreases and the hydrogen desorption kinetics is slow.

Method used

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  • A metal aminoborane composite hydrogen storage material
  • A metal aminoborane composite hydrogen storage material
  • A metal aminoborane composite hydrogen storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Adopt a planetary ball mill equipped with a remote temperature-pressure monitoring system, and the raw materials Will be LiH, NH 3 BH 3 In the ratio of 1.01:1 into the ball mill tank, the ball material ratio is 50:1, filled with hydrogen to 4 bar, the upper temperature limit of the ball mill tank is set to 30 °C, and the ball mill speed is 400r / min. The temperature and pressure changes in the ball mill tank are monitored in real time and adjusted in real time, and the cumulative ball milling time is 10h.

[0024] The product after ball grinding is taken in the glove box, and XRD structural analysis is performed after sealing the sample, such as Figure 1 in the 1-a data line, the product is α-LiNH 2 BH 3 and LiH complexes.

[0025] The prepared product 5~10mg was taken, DSC was analyzed at a heating rate of 2K / min, and the released gas was analyzed by mass spectrometry, and the results were as follows Figure 2 In the 2-a data cable and Figure 3-a As shown, the initial hydrog...

Embodiment 2

[0031] Adopt a planetary ball mill equipped with a remote temperature-pressure monitoring system, and the raw materials Will be LiH, NH 3 BH 3 V-Ti-Cr alloy is loaded into the ball mill tank in the ratio of 1.01:1:0.1, the ball material ratio is 50:1, the hydrogen is filled to 10 bar, the upper limit of the ball mill tank temperature is set to 30 °C, and the ball mill speed is 400r / min. The temperature and pressure changes in the ball mill tank are monitored in real time and adjusted in real time, and the cumulative ball milling time is 8h.

[0032] Sample structure, hydrogen release temperature and kinetics of the analysis method is the same as Example 1, ball mill product XRD analysis results show that, as shown in FIG. 3, after the addition of V-Ti-Cr, the product in addition of α - LiNH 2 BH 3 and LiH, where (V-Ti-Cr)H appears x phase, which illustrates the ball milling process, the hydrogen storage alloy has undergone hydrogenation.

[0033] 0.5g of composite products were ta...

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Abstract

The invention discloses a metal aminoborane composite hydrogen storage material, which belongs to the technical field of solid hydrogen storage materials. The metal aminoborane composite hydrogen storage material is composed of α-LiNH 2 BH 3 phase, LiH phase and hydrogen storage alloy hydride phase composition, with LiH, NH 3 BH 3 and hydrogen storage alloys as raw materials by in-situ metallization compound ball milling, NH 3 BH 3 , LiH, hydrogen storage alloy molar ratio is 1: (1.01 ~ 1.05): (0.1 ~ 0.5). Compared with ammonia borane and metal ammonia borane, the metal aminoborane composite hydrogen storage material can rapidly dehydrogenate near room temperature, has faster hydrogen desorption kinetics, no impurity gas generation, and has simple preparation process and high efficiency. With high advantages, it can be used as a high-safety and high-density solid-state hydrogen source for fuel cells.

Description

Technical field [0001] The present invention belongs to the technical field of solid hydrogen storage materials, in particular to a metal aminoborane composite hydrogen storage material. Background [0002] Hydrogen plays an extremely important role in the current global energy system, and lightweight, high-capacity solid hydrogen storage materials can meet the needs of safe storage and transportation of hydrogen. However, in the actual application process, these solid hydrogen storage materials often have a high hydrogen release temperature and a small hydrogen discharge capacity, which is difficult to meet the needs of actual production. Therefore, it is urgent to find a method for preparing solid hydrogen storage materials with high capacity and mild hydrogen release conditions, in order to meet the application requirements of hydrogen storage materials in the field of fuel cells. [0003] At present, as a representative of chemical hydrogen storage materials, ammonia borane i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/00
CPCC01B3/0078C01B3/0031C01P2002/72Y02E60/32
Inventor 武媛方刘晓然王树茂蒋利军李志念叶建华袁宝龙郭秀梅
Owner GRIMAT ENG INST CO LTD
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