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题名: Structures and Hydrogen Storage Properties of Mg(45)M(5)Co(50) (M=Zr, Ni, Al) Ternary Alloys by Mechanical Alloying
作者: Chu, Hai-Liang1, 2;  Zhang, Yao1;  Sun, Li-Xian1;  Tian, Qi-Feng1, 2;  Xu, Fen1;  Zhang, Tao1, 2;  Yuan, Hua-Tang3
关键词: Mg(45)M(5)Co(50) ternary alloys ;  P-C-T curve ;  Mechanical alloying ;  Hydrogen storage property ;  Structure
刊名: INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
发表日期: 2006-05-01
卷: 1, 期:1, 页:47-54
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: Ternary alloys Mg(45)M(5)Co(50)(M= Zr, Ni, Al) were synthesized by mechanical alloying technique to improve the hydrogen storage properties of Mg(50)Co(50) binary body centered cubic (BCC) alloy. X-ray diffraction (XRD) revealed that the Bragg peaks of these alloys were broadened, which indicated that the crystalline size of these alloys was fully pulverized. Both BCC phase and amorphous phase in the ternary alloys were found after ball milling for more than 80 h by transmission electron micrograph (TEM). With the increase of ball milling time, however, the BCC phase disappears gradually and the amorphous phase dominated the alloys eventually. Pressure-Composition-Isotherms (P-C-T) measurements showed that these ternary alloys containing BCC phase can absorb hydrogen at 353 K within the hydrogen pressure range of 0 similar to 3 MPa. Mg(45)Al(5)Co(50) alloy had the maximum hydrogen absorption amount (2.0 wt. %) among these ternary alloys. Moreover, ternary Mg45Al5Co50 alloy exhibited better hydrogenation kinetics than binary Mg(50)Co(50) alloy. The former took about 30 h to reach the maximum capacity, which is faster than the latter of 40 h. The third elements Ni and Zr improve the hydrogen desorption properties of Mg(50)Co(50) alloy which hardly desorbs any hydrogen. TG analysis showed that Mg(45)Ni(5)Co(50) and Mg(45)Zr(5)Co(50) can desorb hydrogen 0.5 wt. % at 350 K and 1.0 wt. % at 470 K, respectively.
语种: 英语
WOS记录号: WOS:000208126200005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140252
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Nankai Univ, Ins New Energy Mat Chem, Tianjin 300071, Peoples R China

Recommended Citation:
Chu, Hai-Liang,Zhang, Yao,Sun, Li-Xian,et al. Structures and Hydrogen Storage Properties of Mg(45)M(5)Co(50) (M=Zr, Ni, Al) Ternary Alloys by Mechanical Alloying[J]. INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,2006,1(1):47-54.
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