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ErF3-containing rare earth composite reversible hydrogen storage material and preparation method thereof

A hydrogen storage material and rare earth composite technology, applied in the direction of hydrogen production, etc., can solve the problems of non-reversibility, high decomposition temperature, and no reversibility, so as to improve kinetic performance, reduce hydrogen release temperature, and low hydrogen release The effect of temperature

Inactive Publication Date: 2011-09-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many difficulties in the production of hydrogen by hydrolysis of sodium borohydride, and it is not reversible
Another method can also produce hydrogen by heating sodium borohydride decomposition, but there are also many disadvantages, such as high decomposition temperature, pure NaBH 4 It needs to be above 500°C to decompose and release hydrogen, and there is almost no reversibility, so it is difficult to apply in practice

Method used

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  • ErF3-containing rare earth composite reversible hydrogen storage material and preparation method thereof
  • ErF3-containing rare earth composite reversible hydrogen storage material and preparation method thereof
  • ErF3-containing rare earth composite reversible hydrogen storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) In terms of mass percentage, the preparation purity is 98% NaBH 4 powder (purchased by Aladdin Reagent Company) and ErF with a purity of 99.99% 33 Powder (purchased by Aladdin Reagent Company). Weigh 1.194gNaBH 4 and 2.242gErF 3 powder, then mixed;

[0022] (2) Add the mixed powder to the ball mill tank, and add steel balls with a mass ratio of balls to material of 30:1 and a mass ratio of large and small balls of 1:2;

[0023] (3) Ball milling under argon protection, the ball milling speed is set to 400r / min, 25 cycles of ball milling, each cycle rotates for 48 minutes and stops for 12 minutes;

[0024] (4) After the ball milling is completed, the sample is taken out to obtain 3 Rare earth composite reversible hydrogen storage materials.

[0025] DSC (Differential Scanning Calorimetry) and XRD (X-ray Diffraction Spectrum) tests were performed on the ball-milled samples.

[0026] figure 1 The PCT curve (pressure component temperature curve) of the material a...

Embodiment 2

[0030] (1) In terms of mass percentage, the preparation purity is 98% NaBH 4 powder (purchased by Aladdin Reagent Company) and ErF with a purity of 99.99% 3 Powder (purchased by Aladdin Reagent Company). Weigh 1.194.gNaBH 4 and 2.242gErE 3 powder, then mixed;

[0031] (2) Add the mixed powder to the ball mill tank, and add steel balls with a mass ratio of balls to material of 30:1 and a mass ratio of large and small balls of 1:2;

[0032] (3) Ball milling under the protection of argon, the ball milling speed is set to 400r / min, 50 cycles of ball milling, each cycle rotates for 48 minutes and stops for 12 minutes;

[0033] (4) After the ball milling is completed, the sample is taken out to obtain 3 Rare earth composite reversible hydrogen storage materials.

[0034] DSC and XRD tests were performed on the milled samples.

[0035] DSC results showed that the amount of hydrogen released was 2.86 (wt)%, and the hydrogen released temperature was 420°C.

Embodiment 3

[0037] (1) In terms of mass percentage, the preparation purity is 98% NaBH 4 powder (purchased by Aladdin Reagent Company) and ErF with a purity of 99.99% 33 Powder (purchased by Aladdin Reagent Company). Weigh 1.542gNaBH 4 and 2.242gErF 3 powder, then mixed;

[0038] (2) Add the mixed powder to the ball mill tank, and add steel balls with a mass ratio of balls to material of 30:1 and a mass ratio of large and small balls of 1:2;

[0039] (3) Ball milling under argon protection, the ball milling speed is set to 400r / min, 12 cycles of ball milling, each cycle rotates for 48 minutes and stops for 12 minutes;

[0040] (4) After the ball milling is completed, the sample is taken out to obtain 3 Rare earth composite reversible hydrogen storage materials.

[0041] DSC and XRD tests were performed on the milled samples.

[0042] DSC results showed that the amount of hydrogen released was 3.14 (wt)%, and the hydrogen released temperature was 422°C.

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Abstract

The invention relates to an ErF3-containing rare earth composite reversible hydrogen storage material and a preparation method thereof. The reversible hydrogen storage material comprises the following components in percentage by mass: 10 to 65.25 percent of ErF3, 34.75 to 90 percent of NaBH4 and less than 0.01 percent of impurity element. The preparation method comprises the following steps of: mixing 10 to 65.25 mass percent of ErF3 and 34.75 to 90 mass percent of NaBH4 to obtain mixed powder, putting into a ball mill, setting a ball-milling rotating speed, a ball-milling period and ball-milling time and performing ball milling to obtain the ErF3-containing rare earth composite reversible hydrogen storage material. The preparation method of the hydrogen storage material is relatively simple, and the hydrogen storage material has reversibility and dynamics property which cannot be achieved by a pure NaBH4 hydrogen storage material.

Description

technical field [0001] The present invention relates to a kind of ErF containing 3 The rare earth composite reversible hydrogen storage material and the preparation method thereof, the composite hydrogen storage material has superior reversible performance and better hydrogen desorption temperature than existing hydrogen storage materials. The invention belongs to the field of non-metallic materials and hydrogen storage and preparation. Background technique [0002] Hydrogen has a wide range of applications in chemistry. At the same time, with the deepening of the energy crisis, hydrogen energy may become an ideal clean energy in the future, and its role has been paid more and more attention. However, there are still many difficulties in the application of hydrogen fuel cells, mainly because there is no convenient, quick and direct hydrogen supply method and the lack of safe and effective hydrogen storage technology. Therefore, the key to the development of hydrogen vehicl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02
Inventor 邹建新李龙津曾小勤丁文江
Owner SHANGHAI JIAO TONG UNIV
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