Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第13卷    第4期    总第55期    2003年8月

[PDF全文下载]        

    

文章编号:1004-0609(2003)04-0850-04
新型复合材料Mg/MWNTs的储放氢性能
陈 东1, 2, 陈 廉1, 刘 实1, 陈德敏1, 
成会明1, 马常祥2, 王隆保1

(1. 中国科学院 金属研究所, 沈阳 110016; 
2. 东北大学 理学院, 沈阳 110006
)

摘 要: 通过在加氢气氛下高能球磨, 制成了新型复合材料Mg/MWNTs。 利用XRD, TEM-SAED等手段对该材料进行了微结构分析。 采用储放氢实验装置测试了Mg/MWNTs-H2体系的PCT放氢曲线和放氢动力学性能。 研究发现: 复合材料Mg/MWNTs在2.0MPa氢压时,373,473,553和598K温度下, 最大储氢量(质量分数)分别为0.41%,3.37%,5.70% 和6.25%; 复合材料Mg/MWNTs氢化物的焓变和熵变的绝对值均低于纯Mg, 分别降低了10.51%和3.50%; 与纳米晶Mg氢化物相比,复合材料Mg/MWNTs不仅最大储氢量显著增加, 而且放氢动力学性能也明显改善。

 

关键字: 复合材料; Mg/MWNTs; 最大储氢量; 氢化物; 放氢动力学

Hydrogen adsorption/desorption property of
advanced composite Mg/MWNTs
CHEN Dong1, 2, CHEN Lian1, LIU Shi1, CHEN De-min1
CHENG Hui-ming1, MA Chang-xiang2, WANG Long-bao1 

1. Institute of Metal Research, Chinese Academy of Sciences, 
|Shenyang 110016, China; 
2. College of Science, Northeastern University, 
Shenyang 110006, China

Abstract:The advanced composite Mg/MWNTs was made by high energy ball-milling under the hydrogen atmosphere. The microstructure was characterized by using XRD, TEM and SAED techniques. The hydrogen desorption PCT curves and the hydriding/dehydriding kinetics for the composite Mg/MWNTs-H system were examined by taking the apparatus for hydrogen adsorption/desorption. It is found that the maximum hydrogen storage capacities are 0.41%, 3.37%, 5.70% and 6.25% at temperature of 373, 473, 553 and 598K under 2.0MPa hydrogen pressure respectively. The absolute values of enthalpy variable and entropy variable for the composite Mg/MWNTs hydride are lower about 10.51% and 3.50% than that of pure Mg. Compared with the nanocrystalline Mg hydride, not only the maximum hydrogen storage capacity of the composite is greatly increased, but also the desorption kinetics property of the composite is significantly improved.

 

Key words: composite; Mg/MWNTs; maximum hydrogen storage capacity; hydrides; hydrogen desorption kinetics

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com