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Niobium-based coordination hydroboron composite hydrogen storage material and preparation method and applications

A technology of borohydride and hydrogen storage materials, which is applied in the field of niobium-based coordination borohydride composite hydrogen storage materials and its preparation, can solve problems such as complex process flow, high production cost, and large equipment investment, and achieve simple operation requirements, High safety and energy saving effect

Inactive Publication Date: 2011-10-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the disadvantages of the prior art that the requirement for the dehydrogenation temperature of the borohydride is too high, the technical process required for its preparation is complicated, the equipment investment is large, and the production cost is high. The solid-state hydrogen desorption reaction of the system can be realized at low temperature, and the required process flow is simple, the energy consumption is low and the safety is high. The niobium-based coordination borohydride composite hydrogen storage material and its preparation method, the composite hydrogen storage material can Widely used in fields such as battery hydrogen sources and hydrogen energy vehicles

Method used

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  • Niobium-based coordination hydroboron composite hydrogen storage material and preparation method and applications
  • Niobium-based coordination hydroboron composite hydrogen storage material and preparation method and applications
  • Niobium-based coordination hydroboron composite hydrogen storage material and preparation method and applications

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Embodiment 1

[0024] Niobium-based coordination borohydride composite hydrogen storage material Nb(BH 4 ) 5 / 5LiF, niobium-based complex borohydride Nb(BH 4 ) 5 The hydrogen storage density per unit mass is 12 wt%.

[0025] Its preparation method is as follows: take 1.16 g of LiBH 4 (95% purity) and 1.94 g of NbF 5 (purity is 98%) as raw material (LiBH 4 and NbF 5 Powder weight according to LiBH 4 : NbF 5 = 5 : 1 (molar ratio) calculation), at room temperature and pressure and inert gas protection atmosphere, the LiBH 4 and NbF 5 Nb(BH 4 ) 5 / 5LiF composite hydrogen storage material.

[0026] Its chemical reaction equation is: 5LiBH 4 + NbF 5 → Nb(BH 4 ) 5 + 5LiF.

[0027] It was tested by simultaneous thermogravimetric / mass spectrometry. The test conditions are as follows: the heating rate is 10°C / min, the flow rate of high-purity argon protective gas is 40ml / min, and the heating temperature rises from room temperature to 450°C.

[0028] From figure 2 It can be s...

Embodiment 2

[0030] Niobium-based coordination borohydride composite hydrogen storage material Nb(BH 4 ) 5 / 5LiCl, niobium-based complex borohydride Nb(BH 4 )5 The hydrogen storage density per unit mass is 12 wt%.

[0031] Its preparation method is as follows: take 1.21 g of LiBH 4 (95% purity) and 2.88 g of NbCl 5 (purity is 99%) as raw material (LiBH 4 and NbF 5 Powder weight according to LiBH 4 : NbCl 5 = 5 : 1 (molar ratio) calculation), at room temperature and pressure and inert gas protection atmosphere, the LiBH 4 and NbCl 5 Nb(BH 4 ) 5 / 5LiCl composite hydrogen storage material.

[0032] Its chemical reaction equation is: 5LiBH 4 +NbCl 5 → Nb(BH 4 ) 5 + 5LiCl.

Embodiment 3

[0034] Niobium-based coordination borohydride composite hydrogen storage material Nb(BH 4 ) 5 / 5LiF, niobium-based complex borohydride Nb(BH 4 ) 5 The hydrogen storage density per unit mass is 12 wt%.

[0035] Its preparation method is as follows: Take 1.93 g of LiBH 4 (95% pure) and 3.23 g of NbF 5 (purity is 98%) as raw material (LiBH 4 and NbF 5 Powder weight according to LiBH 4 : NbF 5 = 5 : 1 (molar ratio) calculation), at room temperature and inert gas protection atmosphere, the LiBH 4 and NbF 5 Nb(BH 4 ) 5 / 5LiF composite hydrogen storage material.

[0036] Its chemical reaction equation is: 5LiBH 4 + NbF 5 → Nb(BH 4 ) 5 + 5LiF.

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Abstract

The invention relates to the field of hydrogen storage material, and discloses a niobium-based coordination hydroboron composite hydrogen storage material and a preparation method. The hydrogen storage material is mainly used for the fields of fuel cell hydrogen supply source, hydrogen vehicles and the like. The basic material of the composite hydrogen storage material-niobium-based coordination hydroboron has the following chemical formula: Nb(BH4)5, and the hydrogen storage density in unit mass is 12wt%. The preparation method of composite hydrogen storage material is as follows: under the protective atmosphere of a room temperature and inert gas, grinding lithium borohydride and halogenate niobium in an agate mortar according to the molar ratio being 5:1, wherein white LiBH4 is gradually changed into the rufous Nb(BH4)5 hydroboron during grinding, thus directly obtaining Nb(BH4)5 / 5LiM composite hydrogen storage material. According to the method, the needed niobium-based coordination hydroboron can be synthesizing by simple manual grinding under normal temperature and pressure, the operation requirement is simple, the safety is high, and the invention is particularly suitable for large-scale industry production.

Description

technical field [0001] The invention relates to the field of novel hydrogen storage materials, in particular to a niobium-based coordination borohydride composite hydrogen storage material, its preparation method and application. Background technique [0002] Hydrogen energy is a clean and efficient secondary energy source. As an important way to solve the problems of fossil fuel depletion and environmental degradation, the development of hydrogen energy has attracted extensive attention from governments and researchers around the world. At present, the bottleneck problem of safe and efficient hydrogen storage technology has not been effectively resolved, thus hindering the development of hydrogen energy economy. Research and development of various new high-capacity hydrogen storage materials is an important direction in the field of hydrogen storage research "M.G. Schultz, T. Diehl, G.P. Brasseur, W. Zittel. Science, 2003, 302(5645): 624–627.". In order to meet the needs o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02C01B6/23
Inventor 肖学章李露陈立新寇化秦邵杰姜昆李寿权陈长聘
Owner ZHEJIANG UNIV
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