PMMA表面包覆LaNi<sub>5</sub>合金粉末的储氢性能

doi:10.19976/j.cnki.43-1448/TF.2022045

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Abstract LaNi₅ hydrogen storage alloy powders are easy to be oxidized, seriously affecting the hydrogen storage properties of LaNi₅ alloy. In this paper, PMMA (poly methyl meth acrylate) was used to modify the surface of LaNi₅ alloy by the solution impregnation method. The micrmorphology, hydrogen storage properties, and oxidation resistance of LaNi₅ alloy were investigated. The results show that the hydrogen storage capacity of air-oxidated PMMA-coated LaNi₅ alloy after oxidation is maintained at 1.29%, while that of LaNi₅ alloy decreases to 1.15% (mass fraction, %, the same below). Compared with the uncoated LaNi₅ alloy, the dehydrogenation and hydrogenation kinetic and hydrogen storage capacity of PMMA-coated LaNi₅ alloy after air-exposure are well maintained, and the PMMA-coated LaNi₅ alloy possesses good cycling stability. Therefore, PMMA-coated LaNi₅ alloy can mitigate the oxidation reaction of the alloy and improve the oxidation resistance of the alloy. It is beneficial for alloy applications and hydrogen storage safety.

Key words： LaNi₅ alloy oxidation resistance PMMA coating alloy powder

Received: 06 April 2022 Published: 27 January 2023

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TG139.7

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	Articles by authors
	LI Ke
	GAO Yunhe
	HUANG Tongwen
	ZHOU Chengshang

Cite this article:

LI Ke,GAO Yunhe,HUANG Tongwen, et al. Hydrogen storage properties of PMMA-coated LaNi₅ alloy powders[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(6): 595-600.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022045 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I6/595

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