Modified borane ammoniate hydrogen storage material and preparation method thereof

A hydrogen storage material, borane ammonia technology, applied in chemical instruments and methods, metal hydrides, inorganic chemistry, etc., can solve the problems of generating large volatile impurity gases, restricting the application of hydrogen storage, etc., and achieve a good application prospect of hydrogen storage , Suppression of impurity gas release, high hydrogen discharge capacity effect

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 modified borane ammonium compound hydrogen storage material and its preparation method, which solves the

Method used

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  • Modified borane ammoniate hydrogen storage material and preparation method thereof
  • Modified borane ammoniate hydrogen storage material and preparation method thereof
  • Modified borane ammoniate hydrogen storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First, with NaBH 4 and NH 4 F is the starting material, the molar ratio is 1:1, and the mixture of DADB / 2NaF is prepared by mechanical ball milling method; then the by-product NaF in the ball milled sample is removed by dissolving, filtering, deammonizing and other steps with liquid ammonia as solvent, A white DADB powder was obtained as follows:

[0031] The raw material used is: NaBH 4 (purity 98%, ~200 mesh), NH 4 F (purity 98%, ~200 mesh).

[0032] NaBH in an argon atmosphere glove box 4 / NH 4 The F mixture and stainless steel balls were put into a stainless steel ball mill jar, sealed with a cover, and placed on a Fritsch 7 planetary ball mill for 3 hours of ball milling. The ball milling atmosphere is high-purity argon (purity 99.9999%), the initial pressure is 1 atmosphere, and the mass ratio of balls to materials is about 100:1. Put the ball-milled sample into a three-necked round-bottomed flask filled with liquid ammonia solvent, stir ultrasonically for ...

Embodiment 2

[0039] First, with LiBH 4 and NH 4 Cl is the starting material, the molar ratio is 1:1, the ball milling time is 1 hour, and the rest of the preparation conditions are the same as in Example 1.

[0040] The raw material used is: LiBH 4 (purity 98%, ~200 mesh), NH 4 Cl (purity 98%, ~200 mesh).

[0041] X-ray diffraction test conditions are the same as in Example 1. Figure 4 gives (a) LiBH 4 / NH 4 X-ray diffraction pattern of Cl ball-milled sample and (b) DADB after purification. The results showed that LiBH 4 / NH 4 The Cl mixture reacts completely according to the stoichiometric ratio during the ball milling process to form a mixture of DADB and LiCl. The X-ray diffraction pattern of DADB and the results reported in the literature [1.S.G Shore and K.W. Inorg.Chem.1964, 3, 914-915] consistent; the liquid ammonia purification method can effectively remove the by-product LiCl, and finally obtain a white DADB powder sample with a particle size of about 300 mesh, a purity...

Embodiment 3

[0047] First, with LiBH 4 and (NH 4 ) 2 SO 4 as the starting material, the molar ratio is 2:1, the ball milling time is 2 hours, and the rest of the preparation conditions are the same as in Example 1.

[0048] The raw material used is: LiBH 4 (purity 98%, ~200 mesh), (NH 4 ) 2 SO 4 (purity 98%, ~200 mesh).

[0049] X-ray diffraction test conditions are the same as in Example 1. Figure 7 gives (a)2LiBH 4 / (NH 4 ) 2 SO 4 The X-ray diffraction pattern of the ball-milled sample and (b) DADB after purification. The results showed that 2LiBH 4 / (NH 4 ) 2 SO 4 During the ball milling process, the mixture reacted completely according to the stoichiometric ratio to form DADB and Li 2 SO 4 The mixture, the X-ray diffraction pattern of DADB and the results reported in the literature [1.S.G Shore and K.W. Inorg.Chem.1964,3,914-915] consistent; adopting the liquid ammonia purification method can effectively remove the by-product Li 2 SO 4 , finally obtained a white ...

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Abstract

The invention relates to the field of hydrogen storage materials, in particular to a modified borane ammoniate hydrogen storage material and a preparation method thereof, solving the problem that hydrogen storage application and the like are restricted by a large amount of volatile impurity gases produced in the pyrolysis process of a borane ammoniate (DADB (diamido-diborane)). The modified borane ammoniate hydrogen storage material consists of borane ammoniate and a modified additive, wherein the molar ratio of the borane ammoniate to the modified additive is (0.5-50):1. The preparation method comprises the following steps of: putting a mixture comprising the DADB and the modified additive into a ball-milling pot, and carrying out ball milling under an inertial gas protection atmosphere (the initial pressure is 1 atmosphere). Because the DADB and the modified additive are mixed and subjected to ball milling, impurity gases can be effectively prevented from being released, and the modified DADB material has the advantages of high hydrogen release capacity, low hydrogen release temperature, favorable hydrogen storage prospect and the like.

Description

Technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a modified borane ammonia compound hydrogen storage material and a preparation method thereof. Background technique [0002] Hydrogen energy is an efficient, clean, and renewable secondary energy source, which provides an ideal alternative energy source for solving global problems such as energy, climate, and environment. However, the large-scale commercial application of hydrogen energy faces a series of technical challenges in hydrogen production, hydrogen storage / transportation, and hydrogen utilization. The "bottleneck" link that can be exploited. Among the existing hydrogen storage methods, material-based solid-state hydrogen storage is significantly superior to high-pressure hydrogen containers and cryogenic liquid hydrogen in terms of operational safety and hydrogen storage volume density, so it is regarded as the most promising hydrogen storage method. Among th...

Claims

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Application Information

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IPC IPC(8): C01B6/13C01B3/06
CPCY02E60/362Y02E60/36
Inventor 王平方占召康向东
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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