Multi-metal ammonia borane compound hydrogen storage material and preparation and composite hydrogen release method thereof

A metal ammonia borane and hydrogen storage material technology, which is applied in the fields of novel multi-component metal ammonia borane compound hydrogen storage materials and their preparation and composite hydrogen release, can solve the problems of reducing the theoretical hydrogen storage capacity of metal ammonia borane compounds, etc. The effect of improving energy efficiency and increasing energy density

Inactive Publication Date: 2012-07-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a novel multi-element metal ammonia borane compound hydrogen storage material and its preparation method, as well as composite dehydrogenation technology, to solve the problems existing in the prior art with the increase of the weight of the metal element replaced, the metal ammonia borane compound The theoretical hydrogen storage capacity is greatly reduced and other issues

Method used

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  • Multi-metal ammonia borane compound hydrogen storage material and preparation and composite hydrogen release method thereof
  • Multi-metal ammonia borane compound hydrogen storage material and preparation and composite hydrogen release method thereof
  • Multi-metal ammonia borane compound hydrogen storage material and preparation and composite hydrogen release method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] with 3NH 3 BH 3 +NaMgH 3 As the starting material, NaMg(NH 2 BH 3 ) 3 Research on the dehydrogenation performance of polymetallic ammonia borane compounds and their composites.

[0032] The raw material used is: NH 3 BH 3 (purity 97wt.%), NaMgH 3 (purity 95wt.%). In an argon atmosphere glove box, a 3:1 molar ratio of NH 3 BH 3 / NaMgH 3 The mixture and stainless steel balls were put into a stainless steel ball mill jar, sealed with a cover and then placed on a Fritsch 7 planetary ball mill for grinding for 1 hour. The ball milling atmosphere is high-purity argon (volume purity 99.9999%), the initial pressure is 1 atmosphere, and the mass ratio of balls to materials is 40:1. During the milling process, no significant pressure increase in the milling tank was found.

[0033] X-ray testing equipment and conditions: Rigaku D / max 2500, Cu Ka rays. figure 1 respectively give 3NH 3 BH 3 / NaMgH 3 (by molar ratio) The X-ray pattern of the mixture after ball milli...

Embodiment 2

[0039] with 3NH 3 BH 3 +KMgH 3 As the starting material, KMg(NH 2 BH 3 ) 3 Hydrogen storage material.

[0040] The raw material used is: NH 3 BH 3 (purity 97wt.%), KMgH 3 (purity 95wt.%). Raw material molar ratio is NH 3 BH 3 : KMgH 3 = 3:1. The ball milling time was 2 hours, and the other sample preparation conditions were the same as in Example 1. Figure 6 respectively give 3NH 3 BH 3 / KMgH 3 X-ray pattern of the sample after ball milling and heat treatment (temperature 45°C, time 20 hours). The results showed that with 3NH 3 BH 3 / NaMgH 3 The system is similar, 3NH 3 BH 3 and KMgH 3 During the ball milling process, the stability of each phase is basically maintained, and after heat treatment, KMg(NH 2 BH 3 ) 3 .

[0041] The hydrogen release performance of the material was tested by the volumetric method. Figure 7 gives 3NH 3 BH 3 / KMgH 3 Hydrogen desorption kinetics of ball milled samples at 80°C. The test results show that: due to the comp...

Embodiment 3

[0043] with 6NH 3 BH 3 +Li 3 H 6 As the starting material, Li was prepared by ball milling method 3 Al(NH 2 BH 3 ) 6 Hydrogen storage material.

[0044] The raw material used is: NH 3 BH 3 (purity 97wt.%), Li 3 H 6 (purity 95wt.%). Raw material molar ratio is NH 3 BH 3 : Li 3 H 6 =6:1. The raw materials were ball milled for 5 hours under a hydrogen atmosphere, and the other sample preparation conditions were the same as in Example 1. Figure 8 gives 6NH 3 BH 3 / Li 3 H 6 Hydrogen desorption kinetics of ball milled samples at 80°C. The test results show that: 6NH 3 BH 3 / Li 3 H 6 7 wt.% hydrogen gas was evolved within 2 minutes at 80°C.

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Abstract

The invention relates to the field of hydrogen storage material and hydrogen production, in particular to a multi-level ammonia borane compound hydrogen storage material and preparation and composite hydrogen release method thereof. The mixture of ammonia borane NH3BH3 and multi-metal hydride M1Mm2nHx is used as the starting material, and the multi-level ammonia borane compound hydrogen storage material is prepared by ball milling or auxiliary heat treatment in an inertia protection atmosphere or reactive hydrogen atmosphere, wherein the molecular formula of the multi-level ammonia borane compound hydrogen storage material is M1mM2n(NH2BH3)x, wherein 0<m<=4, 0<n<=4 and 1<=x<=10; the starting material comprises the phases of NH3BH3 and M1mM2nHx at a molar ratio of (1-10):1. The multi-level ammonia borane hydrogen storage material provided by the invention has obvious advantages of relatively high hydrogen storage capacity, low hydrogen release temperature, no impurity gas pollutant and the like. The composite hydrogen release technology provided by the invention effectively integrates the synthesis reaction and decomposition reaction of the multi-level ammonia borane so that the hydrogen storage system can realize high-capacity and fast hydrogen release in a proper temperature, and has application prospect in vehicular hydrogen storage.

Description

Technical field [0001] The invention relates to the fields of hydrogen storage materials and hydrogen production, in particular to a novel multi-element metal ammonia borane compound hydrogen storage material and its preparation and composite hydrogen discharge method. Background technique [0002] Hydrogen is recognized as the most ideal clean energy carrier, with significant advantages such as high gravimetric energy storage density, wide range of sources, recyclable utilization and no negative environmental effects in the process of energy utilization. At present, promoting the application of hydrogen energy has become a prominent focus of the energy strategies of many developed countries. The large-scale commercial application of hydrogen energy involves technical links such as hydrogen production, hydrogen storage / transportation, and hydrogen use. Among them, the hydrogen storage / transportation link is recognized for its comprehensive performance indicators in terms of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/21C01B6/23C01B3/06
CPCY02E60/362Y02E60/36
Inventor 王平康向东
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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