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Lithium borohydride hydrogen storage material decorated 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: 2007-10-17
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] LiBH 4 For commercial purchase, TiO 2 Prepared by sol-gel method (H. Choi, E. Statathos, D.D. Dionysiou, Applied Catalysis B-Environmental 2006, 63, 60-67.). LiBH 4 and different mass percentages of TiO 2 (20%-80%) are mixed and ball milled in a stainless steel vessel for 5 minutes under the protection of an inert atmosphere. Figure 1 is LiBH 4 and different TiO 2 Mass spectrometry (a) and thermogravimetric (b) analysis results after mixing. It can be seen that after TiO 2 Modified LiBH 4 The dehydrogenation temperature was significantly lowered. Further, with 80wt% TiO 2 After 1.5 hours of ball milling, LiBH 4 The initial dehydrogenation temperature was reduced to around 150 °C (Fig. 2). From the XRD results, it can be seen that LiBH after dehydrogenation 4 +TiO 2 The reaction yielded a new product, LiTiO 2 , reduce LiBH 4 Root cause of hydrogen desorption temperature.

Embodiment 2

[0021] 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% of the different oxides and grind in an agate vessel for 5 minutes. Figure 4 shows the mass spectrometry results of these mixtures. It can be seen that the LiBH modified by different oxides 4 The dehydrogenation temperature was significantly lowered.

Embodiment 3

[0023] LiBH 4 and Fe 2 o 3 Purchased for business. 50wt%LiBH 4 and 50wt% Fe 2 o 3 After mixing, ball milling was carried out for different time respectively. Fig. 5 is the mass spectrometry analysis result of the mixture of different ball milling times. It can be seen that after Fe 2 o 3 Modified LiBH 4 The dehydrogenation temperature was significantly lowered. Especially ball milled for 4 hours, 50wt% LiBH at 150°C 4 +50wt%Fe 2 o 3The initial hydrogen desorption 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, low-temperature hydrogen-releasing 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 and clean energy is an important issue currently facing the world. Hydrogen energy is one of the most ideal energy sources in the future due to its high efficiency and non-polluting characteristics. Hydrogen storage materials play an important role in the development and utilization of hydrogen energy. Solid metals are one of the promising sources of hydrogen for fuel cells. Among various types of hydrogen storage alloys, AB 5 (With LaNi 5 represents) and AB 2 (with TiMn 2 (represented by) have been developed relatively maturely, but their hydrogen storage c...

Claims

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Application Information

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Patent Type & Authority Applications(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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