Hydrogen storage characterization of Mg17Ni1.5Ce0.5/5 wt.% Graphite synthesized by mechanical milling and subsequent microwave sintering

被引：12

作者：

Jiang, Jianjun ^{[1
]}

Leng, Haiyan ^{[1
]}

Meng, Jie ^{[1
]}

Chou, Kuo-Chih ^{[1
]}

Li, Qian ^{[1
]}

机构：

[1] Shanghai Univ, Shanghai Key Lab Modern Met Mat Proc, Shanghai 200072, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ENERGY RESEARCH | 2013年 / 37卷 / 07期

基金：

中国国家自然科学基金;

关键词：

hydrogen storage; Mg17Ni1; 5Ce0; 5; wt; % graphite; mechanical milling; microwave sintering; PRESSURE-COMPOSITION ISOTHERMS; COMBUSTION SYNTHESIS; DESORPTION; ABSORPTION; MAGNESIUM; SYSTEM; KINETICS; SORPTION; MG2NIH4; CARBON;

D O I：

10.1002/er.2980

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Mg17Ni1.5Ce0.5/5 wt.% Graphite was synthesized by microwave sintering in the present work. Its pressure-composition-isotherm curves exhibit two plateaus corresponding to MgH2 and Mg2NiH4 from 563 K to 623 K, and the hydrogen storage capacity is about 5.6 wt.% at 593 K. Differential scanning calorimeter results reveal that its onset temperature and activation energy of desorption are 654.6 K and 107.41 kJ/mol, respectively, which are lower than those of MgH2. Its rate-controlling step of the dehydriding reaction is the diffusion of hydrogen at lower temperature according to Chou model. As the catalyst and microwave absorbing agent, the addition of graphite is in favor of improving the hydrogen storage properties of the sample. Copyright (c) 2012 John Wiley & Sons, Ltd.

引用

页码：726 / 731

页数：6

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