无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2022, Vol. 54 ›› Issue (5): 61-66.doi: 10.19964/j.issn.1006-4990.2021-0452

• 研究与开发 • 上一篇    下一篇

氢化物载体LaMg2Ni对汽车用Mg2Ni 合金储氢性能的影响

郗玉平1(),罗志欢1,2   

  1. 1.北京信息职业技术学院,北京 100070
    2.北京科技大学
  • 收稿日期:2021-07-27 出版日期:2022-05-10 发布日期:2022-05-31
  • 作者简介:郗玉平(1975— ),男,讲师,研究方向为新能源汽车材料开发与应用技术;E-mail:wribi2@163.com
  • 基金资助:
    国家自然科学基金项目(51371094)

Effect of hydride carrier LaMg2Ni on hydrogen storage properties of Mg2Ni alloy for automobile

XI Yuping1(),LUO Zhihuan1,2   

  1. 1.Beijing Information Technology College,Beijing 100070,China
    2.Beijing University of science and technology
  • Received:2021-07-27 Published:2022-05-10 Online:2022-05-31

摘要:

采用机械球磨法制备了Mg2Ni-x%LaMg2Ni复合材料(质量分数x=0、10、20和30),研究了LaMg2Ni含量对Mg2Ni基复合材料物相组成、显微形貌和储氢性能的影响。结果表明,未添加LaMg2Ni的Mg2Ni合金在充分氢化后主要由Mg2NiH4和Mg2NiH0.3组成,而添加LaMg2Ni的Mg2Ni基复合材料主要由Mg2NiH4和LaH3组成;充分放氢后,Mg2NiH4和Mg2NiH0.3转变为Mg2Ni,而LaH3相仍然存在。添加LaMg2Ni的Mg2Ni基复合材料中都弥散分布着白亮色LaH3颗粒,x=20时白亮色细小颗粒分布最为均匀,且随着LaMg2Ni含量增加,Mg2Ni基复合材料基体中镧元素含量逐渐增多。不同LaMg2Ni含量的Mg2Ni基复合材料的最大吸氢容量从大至小顺序为:x=0、x=10、x=20、x=30,最大放氢容量从大至小顺序为:x=20、x=10、x=30、x=0,即添加LaMg2Ni后Mg2Ni基复合材料的储氢性能得到改善,且x=20时Mg2Ni基复合材料具有最高的储氢容量,这主要与Mg2Ni基复合材料中含有弥散分布的LaH3相以及La元素扩散至基体有助于氢的吸附/脱附有关。

关键词: LaMg2Ni, Mg2Ni基复合材料, LaH3, 显微形貌, 储氢性能

Abstract:

Mg2Ni-x%LaMg2Ni(x=0,10,20 and 30) composites were prepared by mechanical ball milling,the effect of LaMg2Ni content on phase composition,microstructure and hydrogen storage properties of Mg2Ni matrix composites was studied.The results showed that Mg2Ni alloy without LaMg2Ni addition was mainly composed of Mg2NiH4 and Mg2NiH0.3 after full hydrogenation,while Mg2Ni matrix composites with LaMg2Ni addition were mainly composed of Mg2NiH4 and LaH3.After full dehydrogenation,Mg2NiH4 and Mg2NiH0.3 were transformed into Mg2Ni,while LaH3 phase still existed.White bright LaH3 particles were dispersed in the Mg2Ni matrix composites added with LaMg2Ni.When x=20,the distribution of white bright fine particles was the most uniform,and the content of La in the matrix of Mg2Ni matrix composites increased gradually with the increase of LaMg2Ni content.The maximum hydrogen absorption capacity of Mg2Ni matrix composites with different LaMg2Ni content was in the order of x=0,x=10,x=20,x=30,and the maximum hydrogen evolution capacity was in the order of x=20,x=10,x=30,x=0.It was that after adding LaMg2Ni the hydrogen storage performance of Mg2Ni matrix composites was improved.When x=20,Mg2Ni matrix composites had the highest maximum hydrogen evolution capacity,which was mainly related to the existence of dispersed LaH3 phase in Mg2Ni matrix composites and the diffusion of La element to the matrix,which helped to improve the hydrogen storage performance.

Key words: LaMg2Ni, Mg2Ni matrix composites, LaH3, micro morphology, hydrogen storage performance

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