Improvement of hydrogen storage characteristics of Mg/Mg2Ni by alloying: Beneficial effect of In

被引：23

作者：

Cermak, J. ^{[1
]}

Kral, L. ^{[1
]}

机构：

[1] CEITEC IPM, AS CR, Vvi, Inst Phys Mat, CZ-61662 Brno, Czech Republic

来源：

JOURNAL OF POWER SOURCES | 2012年 / 214卷

关键词：

Magnesium alloys; Hydrogen desorption; Hydrogen storage; Hydrogen storage materials; SORPTION PROPERTIES; REACTION-KINETICS; MG; NI; DESORPTION; NB2O5; MG2NI; GE; DEHYDROGENATION;

D O I：

10.1016/j.jpowsour.2012.04.035

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present paper, hydrogen desorption from hydrided binary alloys Mg-xNi (x = 8.5, 11.3, 20 at. %) and from hydrided alloys Mg-8.5 Ni-2.7 X (X = Si, Ge, Sn and In; all in at. %) was investigated. It was observed that the phase composition of hydrided binary Mg-xNi alloys changed within several days after hydridation and that rapid hydrogen desorption occurred after this ageing. The ageing mechanism was clarified and its kinetics was modified by alloying. The best results were achieved by adding In: (i) the ageing process was accelerated, enabling rapid hydrogen charging/discharging cycling (ii) the storage capacity was improved slightly, and (iii) the activation enthalpy of hydrogen desorption was decreased, resulting in easier hydrogen releasing. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：208 / 215

页数：8

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