Lithium borohydride hydrogen storage material modified by oxide and preparation method thereof

A hydrogen storage material, lithium borohydride technology, applied in the direction of chemical instruments and methods, borane/diborane hydride, other chemical processes, etc., can solve the problems that are difficult to meet the practical application of alloys, and achieve a simple and efficient method. The effect of hydrogen temperature reduction

Inactive Publication Date: 2010-01-20
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this is still difficult to meet the practical application of this type of alloy

Method used

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  • Lithium borohydride hydrogen storage material modified by oxide and preparation method thereof
  • Lithium borohydride hydrogen storage material modified by oxide and preparation method thereof
  • Lithium borohydride hydrogen storage material modified by oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] LiBH 4 For commercial purchase, TiO 2 Prepared by the sol-gel method (H. Choi, E. Stathatos, D. D. Dionysiou, Applied Catalysis B-Environmental 2006, 63, 60-67.). LiBH 4 And different mass percentages of TiO 2 (20%-80%) After mixing, ball mill for 5 minutes in a stainless steel vessel under the protection of an inert atmosphere. figure 1 LiBH 4 And different TiO 2 Mass spectrometry (a) and thermogravimetric (b) analysis results after mixing. As you can see, after TiO 2 Modified LiBH 4 The hydrogen release temperature is significantly reduced. Further, after being combined with 80wt% TiO 2 After 1.5 hours of ball milling, LiBH 4 The initial hydrogen release temperature is reduced to about 150℃ ( figure 2 ). From the XRD results, you can see the LiBH after dehydrogenation 4 +TiO 2 The reaction produced a new product LiTiO 2 , Lower LiBH 4 The root cause of hydrogen release temperature.

Embodiment 2

[0025] LiBH 4 And ZrO 2 For commercial purchase, TiO 2 , TiO 2 -SiO 2 And Al 2 O 3 -SiO 2 Prepared by sol-gel method. LiBH 4 Mix with 50% different oxides and grind in an agate ware for 5 minutes. Figure 4 The mass spectrometry results of these mixtures. It can be seen that LiBH modified by different oxides 4 The hydrogen release temperature is significantly reduced.

Embodiment 3

[0027] LiBH 4 And Fe 2 O 3 Buy for business. 50wt% LiBH 4 And 50wt% Fe 2 O 3 After mixing, ball milling was performed for different time. Figure 5 It is the mass spectrum analysis result of the mixture of different ball milling time. As you can see, after Fe 2 O 3 Modified LiBH 4 The hydrogen release temperature is significantly reduced. Especially ball milling for 4 hours, 50wt% LiBH at 150℃ 4 +50wt%Fe 2 O 3 The initial hydrogen release temperature of the components is reduced to about 150°C, and most of the hydrogen can be released below 250°C.

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Abstract

The invention relates to liborohydride hydrogen storage material and a preparation method thereof, which is characterized in that the formula of hydrogen storage material is (100-x)LiBH4+XMeO, wherein MeO is a adorning oxide, weight percent of X is 10-80%. After blending LiBH4 and the oxide according to the formula, the mixture is ball milled in protection of inert atmosphere to process surface treatment. The oxide is optional one of TiO2, Fe2O3, ZrO2, V2O5, SiO2, Al2O3, Al2O3-SiO2 or TiO2-SiO2. The intial hydrogen temperature of hydrogen storage material of the invention is lower than 100 DEG C, hydrogen amount is 3-6.5% at lower than 300 DEG C.

Description

Technical field [0001] The invention relates to a high-capacity lithium borohydride (LiBH 4 ) Hydrogen storage materials and preparation methods. More specifically, it relates to oxide-modified lithium borohydride hydrogen storage materials and preparation methods. It belongs to the field of hydrogen storage materials. Background technique [0002] The development of renewable clean energy is currently an important issue facing the world. Due to its high efficiency and pollution-free characteristics, hydrogen energy is one of the most ideal energy sources in the future. Hydrogen storage materials play an important role in the development and utilization of hydrogen energy. Solid metal is one of the promising hydrogen sources for fuel cells. Among various hydrogen storage alloys, AB 5 (With LaNi 5 As representative) and AB 2 (With TiMn 2 As a representative), the development is relatively mature, but its hydrogen storage capacity is less than 2% (mass percentage), which restri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B6/21B01J20/04
Inventor 余学斌吴铸陈秋荣李志林黄铁生
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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