材料研究学报  2011, Vol. 25 Issue (4): 373-380

研究论文 本期目录 | 过刊浏览 |

快淬纳米晶Mg2Ni型合金的气态和电化学贮氢动力学

张羊换1,2, 任慧平2, 马志鸿1,3, 李霞1,2, 张国芳1,2, 赵栋梁1

1.钢铁研究总院功能材料研究所 北京 100081 2.内蒙古科技大学省部共建国家重点实验室培育基地 包头 014010 3.包头稀土研究院 包头 014010

Gaseous and Electrochemical Hydrogen Storage Kinetics of As–Spun Nanocrystalline Mg2Ni1−xCux(x=0–0.4) Alloys

ZHANG Yanghuan1,2,   REN Huiping2,   MA Zhihong1,3,   LI Xia ZHANG1,2,  Guofang1,2,  ZHAO Dongliang1

1.Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081 2.Elected State Key Laboratory, Inner Mongolia University of Science and Technology, Baotou 014010 3.Baotou Research Institute of Rare Earths, Baotou 014010

张羊换 任慧平 马志鸿 李霞 张国芳 赵栋梁. 快淬纳米晶Mg2Ni型合金的气态和电化学贮氢动力学[J]. 材料研究学报, 2011, 25(4): 373-380.
, , , , , . Gaseous and Electrochemical Hydrogen Storage Kinetics of As–Spun Nanocrystalline Mg2Ni1−xCux(x=0–0.4) Alloys[J]. Chin J Mater Res, 2011, 25(4): 373-380.

摘要 参考文献 相关文章 Metrics 全文: PDF(1457 KB)   摘要: 用快淬技术制备了Mg2Ni1-xCux(x=0, 0.1, 0.2, 0.3, 0.4)合金, 用XRD、SEM、HRTEM分析了铸态和快淬态合金的微观结构, 测试了合金的气态贮氢动力学性能和电化学贮氢动力学。结果表明, 所有快淬态合金均具有纳米晶结构, 没有非晶相。Cu替代Ni不改变合金的主相Mg2Ni, 而是使合金的晶粒显著细化。Cu替代Ni和快淬处理均显著地提高了合金的气态及电化学贮氢动力学性能。当淬速从0 m/s(铸态被定义为淬速0 m/s) 提高到30 m/s时, Mg2Ni0.8Cu0.2合金的5 min吸氢饱和率从56.7%增加到92.7%, 20 min放氢率从14.9%增加到40.4%, 高倍率放电能力从38.5%增加到75.5%, 氢扩散系数从8.34×10-12cm2/s增加到3.74×10-11cm2/s。 关键词 ： 无机非金属材料,  Mg2Ni型合金,  快淬,  Cu替代Ni,  贮氢动力学     Abstract：The Mg2Ni1−xCux (x=0, 0.1, 0.2, 0.3, 0.4) hydrogen storage alloys have been prepared by melt-spinning technology. The structures of the as-cast and spun alloys are characterized by XRD, SEM and TEM. The gaseous hydrogen absorption and desorption kinetics of the alloys were measured by an automatically controlled Sieverts apparatus. The electrochemical hydrogen storage kinetics of the as-spun alloys is tested by an automatic galvanostatic system. The results show that all the as-spun alloys hold an entire nanocrystalline structure and are free of amorphous phase. The substitution of Cu for Ni, instead of changing the major phase Mg2Ni, leads to a visible refinement of the grains of the as-cast alloys. Furthermore, both the melt spinning treatment and Cu substitution significantly improve the gaseous and electrochemical hydrogen storage kinetics of the alloys. As the spinning rate increases from 0 (As-cast is defined as spinning rate of 0 m/s) to 30m/s, the hydrogen absorption saturation ratio in 5 min, for the Mg2Ni0.8Cu0.2alloy, increases from 56.7 to 92.7%, the hydrogen desorption ratio in 20 min from 14.9 to 40.4%, the high rate discharge ability from 38.5 to 75.5%, the hydrogen diffusion coefficient from 8.34×10-12cm2/s to 3.74×10-11cm2/s. 收稿日期: 2010-11-17      ZTFLH:  TB321   基金资助: 国家自然科学基金50871050和50961009, 内蒙古自治区自然科学基金重大2010ZD05资助项目。 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 张羊换 任慧平 马志鸿 李霞 张国芳 赵栋梁 44.8K 链接本文: https://www.cjmr.org/CN/      或      https://www.cjmr.org/CN/Y2011/V25/I4/373 1 I.P.Jain, C.Lal, A.Jain, Hydrogen storage in Mg: A most promising material, Int. J. Hydrogen Energy, 35(10), 5133(2010) 2 X.Y.ZHAO, L.Q.MA, Recent progress in hydrogen storage alloys for nickel/metal hydride secondary batteries, Int. J. 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