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Composite hydrogen storage material and preparation method thereof

A technology of hydrogen storage materials and raw materials, which is applied in the field of composite hydrogen storage materials and its preparation, can solve the problem of low hydrogen release, achieve the effects of improving hydrogen storage performance, good hydrogen storage performance, and shortening the distance of atomic diffusion

Inactive Publication Date: 2016-01-27
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the hydrogen evolution product MgNi 2.5 B 2 Medium to high Ni content, the amount of hydrogen released in the above reaction is too low (~2.6wt.%) [J.J.Vajo, W.Li, P.Liu, Chem.Commun., 2010, 46, 6687]

Method used

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  • Composite hydrogen storage material and preparation method thereof
  • Composite hydrogen storage material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] According to Mg 10 The composition of LaNi weighs magnesium block (purity 99%, add 18wt.% more burning loss), lanthanum block (purity 99.5%, add 3wt.% more burning loss) and nickel sheet (purity 99.5%), and use induction The method of smelting melts the weighed magnesium block, lanthanum block and nickel sheet into an alloy, and further adopts the method of stripping (the edge stripping speed of the copper roller is 40m / s) to obtain amorphous Mg 10 LaNi alloy. amorphous Mg 10 After the LaNi alloy is ground into 100-mesh alloy powder, it is ball milled under 1MPa hydrogen pressure for 2h (ball-to-material ratio 30:1, speed 400rpm), and then heated to 250°C under 3.5MPa hydrogen pressure and kept for 4h to obtain amorphous Mg 10 LaNi alloy hydride. Weigh lithium borohydride and amorphous Mg according to the molar ratio of 7:1 10 LaNi alloy hydride powder, and mix uniformly, can obtain described lithium borohydride / Mg 10 LaNi hydride composite hydrogen storage materia...

Embodiment 2

[0024] According to Mg 10 The components of SmNi were weighed respectively magnesium block (purity 99%, add 18wt.% more burning loss), samarium block (purity 99.5%, add 3wt.% more burning loss) and nickel sheet (purity 99.5%), using induction The method of smelting melts the weighed magnesium block, samarium block and nickel sheet into an alloy, and further adopts the method of stripping (the edge stripping speed of the copper roller is 40m / s) to obtain amorphous Mg 10 SmNi alloy. amorphous Mg 10 After the SmNi alloy is ground into 100-mesh alloy powder, it is ball-milled under 0.5MPa hydrogen pressure for 5h (ball-to-material ratio 30:1, speed 400rpm), and then heated to 250°C under 3.5MPa hydrogen pressure and kept for 2h to obtain amorphous Mg 10 SmNi alloy hydride. Weigh lithium borohydride and amorphous Mg according to the molar ratio of 6.5:1 10 SmNi alloy hydride powder, and mix evenly, can obtain described lithium borohydride / Mg 10 SmNi hydride composite hydrogen ...

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Abstract

The invention discloses a composite hydrogen storage material and a preparation method thereof and belongs to the technical field of hydrogen storage materials. The composite hydrogen storage material comprises lithium borohydride and amorphous-state magnesium-rare earth-nickel alloy hydride in the mole ratio being (6-7):1, wherein a magnesium-rare earth-nickel alloy is Mg10LaNi or Mg10SmNi. During preparation, elementary magnesium, rare earth and nickel are taken as raw materials, an amorphous-state magnesium-rare earth-nickel alloy is obtained through a smelting and melt-spinning technology, amorphous-state magnesium-rare earth-nickel alloy hydride is obtained through ball milling and low-temperature hydrogenation, and finally, lithium borohydride and amorphous-state magnesium-rare earth-nickel alloy hydride are mixed. The provided composite hydrogen storage material has low hydrogen desorption temperature and high hydrogen desorption capacity, and a preparation process is simple, safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a composite hydrogen storage material and a preparation method thereof. Background technique [0002] The development of new renewable energy is the fundamental means to solve the energy crisis and environmental pollution. Hydrogen energy has the advantages of abundant sources, high calorific value and clean combustion products, and is an ideal substitute for traditional fossil energy such as coal, oil and natural gas. The solid-state storage of hydrogen using hydrogen storage materials is a safe and efficient hydrogen storage technology, which is very important for the large-scale application of hydrogen energy. Lithium borohydride has a theoretical hydrogen storage capacity of up to 18.5wt.%, which can meet the medium and long-term research and development goals of vehicle-mounted hydrogen sources, and is currently the focus of research and devel...

Claims

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Application Information

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IPC IPC(8): C01B3/08
CPCY02E60/36
Inventor 柳东明张明陈子亮张庆安斯庭智李永涛
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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