Reversible hydriding and dehydriding properties of CaSi: Potential of metal silicides for hydrogen storage

被引：35

作者：

Aoki, M ^{[1
]}

Ohba, N ^{[1
]}

Noritake, T ^{[1
]}

Towata, S ^{[1
]}

机构：

[1] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 03期

关键词：

D O I：

10.1063/1.1773930

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We found that CaSi reversibly absorbs and desorbs hydrogen. First-principles calculations theoretically indicated that CaSi hydride is thermodynamically stable. The hydriding and dehydriding properties of CaSi were experimentally determined using pressure-composition (p-c) isotherms and x-ray diffraction analysis. The p-c isotherms clearly demonstrated plateau pressures in a temperature range of 473-573 K. The maximum hydrogen content was 1.9 wt % under a hydrogen pressure of 9 MPa at 473 K. The reversible hydriding and dehydriding properties of CaSi suggest the potential of metal silicides for hydrogen storage. (C) 2004 American Institute of Physics.

引用

页码：387 / 388

页数：2

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