Mg2Cu基储氢合金的表面复相改性

来源期刊:中国有色金属学报2010年第9期

论文作者:陈玉安 杨丽玲 林嘉靖 程绩

文章页码:1716 - 1723

关键词:储氢合金;Mg2Cu;机械球磨;表面复相改性;储氢性能

Key words:hydrogen storage alloy; Mg2Cu; mechanical grinding; multi-phase surface modification; hydrogen storage property

摘    要:采用机械球磨法制备Mg2Cu合金,并以该合金为基础,添加质量分数为5%的单质(C、Co、Ni、Cu)或氧化物(Cr2O3、Fe3O4、TiO2、V2O5),通过机械球磨对合金进行表面复相改性。采用p—c—T测试仪测定合金的储氢性能,研究添加不同单质和氧化物对Mg2Cu合金储氢性能的影响。结果表明:在200 ℃和300 ℃下,添加C或Fe3O4能够有效提高Mg2Cu合金的活性,使其易与氢气反应,并缩短吸氢时间,增大吸氢量,改善放氢效果;在400 ℃下,添加Co、Ni、TiO2或Fe3O4能够有效缩短吸氢时间,改善合金的综合储氢性能。

Abstract: Mg2Cu alloys were prepared by mechanical grinding. In order to modify the surface performance of the alloys, 5%(mass fraction) of simple substances such as C, Co, Ni and Cu or oxides such as Cr2O3, Fe3O4, TiO2, V2O5 were added into Mg2Cu alloys by mechanical grinding. The hydrogen storage properties of the alloys were determined by p—c—T apparatus. The effects of simple substances and oxides on the hydrogen storage properties of the alloys were investigated. The results show that the addition of C or Fe3O4 into Mg2Cu alloys can improve the reactivities of the alloys at 200 ℃ and 300 ℃. At those temperatures, the alloys containing C or Fe3O4 can react easily with hydrogen, resulting in that the hydriding times of the alloys can be shortened and the hydriding/dehydriding capacities of the alloys can be improved. The hydrogen absorption times of Mg2Cu alloys with Co, Ni, TiO2 or Fe3O4 can be effectively shortened and the comprehensive hydrogen storage properties of the alloys can be improved at 400 ℃.

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