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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

B和C对Li-N-H络合氢化物储氢性能的影响

刘奕新， 杨书全， 张丹丹， 黎光旭， 韦文楼， 郭 进   

  1. 广西大学 物理科学与工程技术学院， 教育部有色金属材料及其加工新技术重点实验室， 南宁 530004
  • 收稿日期:2008-10-06 修回日期:2008-12-03 出版日期:2009-07-20 网络出版日期:2009-07-20

Effects of B and C on Hydrogen Storage Properties of Li-N-H Complex Hydrides

LIU Yi-Xin, YANG Shu-Quan, ZHANG Dan-Dan, LI Guang-Xu, WEI Wen-Lou, GUO Jin   

  1. College of Physical Science and Technology，Key Laboratory of National Education Ministry for Nonferrous Metals and Materials Processing Technology, Guangxi University，Nanning 530004, China
  • Received:2008-10-06 Revised:2008-12-03 Published:2009-07-20 Online:2009-07-20

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摘要： 利用机械合金化方法制备了Li-N-H络合氢化物，并研究B、C作为催化剂对其储氢性能的影响. 结果表明：LiNH2、Li2NH为Li-N-H络合氢化物的主要储氢相，随B的加入，储氢相的非晶化程度提高. 虽然B、C的添加均使储氢量下降，但n(B)∶n(C)=1∶2的混合添加提高了有效储氢量，同时也提高吸放氢动力学性能；B的添加可有效降低可逆吸放氢温度，适当增加球磨时间，有利于提高可逆吸放氢量.

关键词: Li-N-H络合氢化物, 储氢性能, 机械合金化

Abstract: LiNH complex hydrides were prepared by mechanical alloying and the effects of B and C as catalyst on hydrogen storage properties were investigated. The results show that LiNH2 and Li2NH are the main phases in Li-N-H complex hydrides and the amorphous degree of the main phases increase with B element added. Although the hydrogen storage capacity decrease with B and C element added, the effective hydrogen storage capacity increase and the kinetic properties of hydrogen absorption/desorption can be improved when the adding n(B)∶n(C)=1∶2. The hydrogen absorption/desorption temperature can be decreased effectively with adding B. The reversible hydrogen absorption/desorption capacity can also be improved with milling time prolonging.

Key words: Li-N-H complex hydride, hydrogen storage property, mechanical alloying

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