A method for improving lithium borohydride dehydrogenation

A lithium borohydride and carbon fiber technology, which is applied in the field of hydrogen storage technology and material modification, can solve the problems of storage and transportation danger, low hydrogen storage capacity, and high energy consumption, and achieves improved hydrogen release performance, moderate cost, and easy implementation. Effect

Active Publication Date: 2017-03-29
中国船舶重工集团公司第七一二研究所 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two hydrogen storage methods are simple and easy to implement, but they have high energy consumption, small hydrogen storage capacity, and potential danger in storage and transportation. Therefore, it is extremely necessary to research and develop new chemical hydrogen storage technologies.

Method used

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  • A method for improving lithium borohydride dehydrogenation
  • A method for improving lithium borohydride dehydrogenation
  • A method for improving lithium borohydride dehydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Stir 75mg of lithium borohydride solid powder in 15mL of anhydrous diethyl ether at 20°C until completely dissolved.

[0017] The above ether solution of lithium borohydride was uniformly dropped onto the carbon fiber array with an average diameter of 90 nm and an average length of 3 mm.

[0018] At 40° C., the ether was vacuum-dried to obtain the lithium borohydride carried by the carbon fiber array.

[0019] The SEM photos of carbon fiber arrays carrying lithium borohydride are as follows: figure 1 shown.

[0020] The thermal decomposition hydrogen mass spectrum curve of carbon fiber array carrying lithium borohydride is as follows: figure 2 Shown, wherein the heating rate is 5 degrees Celsius / minute.

[0021] The hydrogen desorption curves of carbon fiber array loaded lithium borohydride and pure lithium borohydride are as follows: image 3 Shown, wherein the heating rate is 5 degrees Celsius / minute.

Embodiment 2

[0023] Stir 50 mg of lithium borohydride solid powder in 12 mL of anhydrous propyl ether at 40°C until completely dissolved.

[0024] The above-mentioned propyl ether solution of lithium borohydride was uniformly dropped on the carbon fiber array with an average diameter of 130 nm and an average length of 1.5 mm.

[0025] At 90° C., propyl ether was vacuum-dried to obtain the lithium borohydride carried by the carbon fiber array.

Embodiment 3

[0027] Stir 50 mg of lithium borohydride solid powder in 20 mL of anhydrous propyl ether at 10°C until completely dissolved.

[0028] The above-mentioned butyl ether solution of lithium borohydride is evenly added dropwise on the carbon fiber array with an average diameter of 200nm and an average length of 5mm;

[0029] At 20° C., the butyl ether was vacuum-dried to obtain the lithium borohydride carried by the carbon fiber array.

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Abstract

The invention discloses a method for improving lithium borohydride hydrogen, which comprises steps: lithium borohydride solid powder is stirred in 40 DEG C anhydrous ether liquid until to be completely dissolved, and obtains solution A, the solution A is uniformly dropt to a carbon fiber array to obtain a product B, solvent in the product B is pumped in a vacuum mode in 20-90 DEG C, thereby obtaining lithium borohydride hydrogen which is born through the carbon fiber array. The method for improving the lithium borohydride hydrogen can obviously improve performance of the lithium borohydride hydrogen, reduces desorption temperature to 60 DEG C from 300 DEG C, discharges hydrogen which is not lower than 10wt% in 300 DEG C, and is simple in process, easy to achieve and moderate in cost.

Description

technical field [0001] The invention belongs to the field of hydrogen storage technology and material modification, and in particular relates to a method for improving hydrogen desorption of lithium borohydride. Background technique [0002] With the intensification of the energy crisis, hydrogen energy has received widespread attention. As a clean, efficient, safe and sustainable new energy, hydrogen energy is regarded as the energy with the most development potential in the 21st century, and it is the development direction of human strategic energy. The utilization of hydrogen energy mainly includes the cheap production of hydrogen, safe and efficient storage and transportation, and large-scale application. As an efficient energy source, hydrogen has not been commercialized so far. The fundamental constraint is that the problem of large-capacity storage and transportation of hydrogen has not been solved. Traditional hydrogen storage methods are mainly physical hydrogen s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/06
CPCY02E60/36
Inventor 唐子威吴飞袁斌管道安
Owner 中国船舶重工集团公司第七一二研究所
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