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Title: Investigations on hydrogen storage properties of Mg{sub 2}Ni+x wt% LaMg{sub 2}Ni (x=0, 10, 20, 30) composites

Abstract

Mg{sub 2}Ni+x wt% LaMg{sub 2}Ni (x=0, 10, 20, 30) composites have been prepared by ball milling Mg{sub 2}Ni and LaMg{sub 2}Ni hydrides. X-ray Diffraction indicates that the composites consist of LaH{sub 3} and Mg{sub 2}NiH{sub 4} phases. Mg{sub 2}NiH{sub 4} phase transforms between with Mg{sub 2}Ni phase during hydriding/dehydriding cycling, while the LaH{sub 3} phase exists still after dehydriding process. Backscatter Electron results reveal that the LaH{sub 3} phase, which is decomposed from hydrided LaMg{sub 2}Ni, distributes in Mg{sub 2}Ni alloy homogeneously after ball milling procedure. Hydriding/Dehydriding measurements indicate significant improvement in reversible hydrogen storage properties of the composites over Mg{sub 2}Ni at low temperature. At 473 K, the hydrogen storage capacity of Mg{sub 2}Ni+20 wt% LaMg{sub 2}Ni composite reaches 3.22 wt% and can reversely desorb hydrogen completely, while the pure Mg{sub 2}Ni hydride is hardly desorbs hydrogen at this temperature. The improvement in the hydrogen storage properties is attributed to the existence of LaH{sub 3} phase in the composites. - Graphical abstract: The Mg{sub 2}Ni + x wt% LaMg{sub 2}Ni (x=10, 20, 30) composites display enhancement on reversible hydrogen storage properties compared with that of pure Mg{sub 2}Ni. Highlights: Black-Right-Pointing-Pointer Tittle La is introduced into Mg{sub 2}Ni alloy withoutmore » multiphase created. Black-Right-Pointing-Pointer La is introduced into Mg{sub 2}Ni by hydrogen decomposed ball-milling. Black-Right-Pointing-Pointer Reversible hydrogen storage properties at low temperature are improved. Black-Right-Pointing-Pointer Hydrogen storage capacity of composites is beyond 3 wt% at 473 K.« less

Authors:
 [1];  [2];  [1];  [2];  [3];  [1];  [2];  [3]
  1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004 (China)
  2. (China)
  3. College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004 (China)
Publication Date:
OSTI Identifier:
22012126
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: . 190; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALLOYS; HYDRIDATION; HYDROGEN; HYDROGEN STORAGE; LANTHANUM HYDRIDES; MATERIALS; MICROSTRUCTURE; MILLING; TEMPERATURE RANGE 0065-0273 K; THERMAL ANALYSIS; X-RAY DIFFRACTION

Citation Formats

Zhao Xin, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Han Shumin, E-mail: hanshm@ysu.edu.cn, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Zhu Xilin, Liu Baozhong, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, and Liu Yanqing. Investigations on hydrogen storage properties of Mg{sub 2}Ni+x wt% LaMg{sub 2}Ni (x=0, 10, 20, 30) composites. United States: N. p., 2012. Web. doi:10.1016/J.JSSC.2012.02.010.
Zhao Xin, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Han Shumin, E-mail: hanshm@ysu.edu.cn, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Zhu Xilin, Liu Baozhong, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, & Liu Yanqing. Investigations on hydrogen storage properties of Mg{sub 2}Ni+x wt% LaMg{sub 2}Ni (x=0, 10, 20, 30) composites. United States. doi:10.1016/J.JSSC.2012.02.010.
Zhao Xin, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Han Shumin, E-mail: hanshm@ysu.edu.cn, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Zhu Xilin, Liu Baozhong, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, and Liu Yanqing. Fri . "Investigations on hydrogen storage properties of Mg{sub 2}Ni+x wt% LaMg{sub 2}Ni (x=0, 10, 20, 30) composites". United States. doi:10.1016/J.JSSC.2012.02.010.
@article{osti_22012126,
title = {Investigations on hydrogen storage properties of Mg{sub 2}Ni+x wt% LaMg{sub 2}Ni (x=0, 10, 20, 30) composites},
author = {Zhao Xin and College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004 and Han Shumin, E-mail: hanshm@ysu.edu.cn and College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004 and Zhu Xilin and Liu Baozhong and School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000 and Liu Yanqing},
abstractNote = {Mg{sub 2}Ni+x wt% LaMg{sub 2}Ni (x=0, 10, 20, 30) composites have been prepared by ball milling Mg{sub 2}Ni and LaMg{sub 2}Ni hydrides. X-ray Diffraction indicates that the composites consist of LaH{sub 3} and Mg{sub 2}NiH{sub 4} phases. Mg{sub 2}NiH{sub 4} phase transforms between with Mg{sub 2}Ni phase during hydriding/dehydriding cycling, while the LaH{sub 3} phase exists still after dehydriding process. Backscatter Electron results reveal that the LaH{sub 3} phase, which is decomposed from hydrided LaMg{sub 2}Ni, distributes in Mg{sub 2}Ni alloy homogeneously after ball milling procedure. Hydriding/Dehydriding measurements indicate significant improvement in reversible hydrogen storage properties of the composites over Mg{sub 2}Ni at low temperature. At 473 K, the hydrogen storage capacity of Mg{sub 2}Ni+20 wt% LaMg{sub 2}Ni composite reaches 3.22 wt% and can reversely desorb hydrogen completely, while the pure Mg{sub 2}Ni hydride is hardly desorbs hydrogen at this temperature. The improvement in the hydrogen storage properties is attributed to the existence of LaH{sub 3} phase in the composites. - Graphical abstract: The Mg{sub 2}Ni + x wt% LaMg{sub 2}Ni (x=10, 20, 30) composites display enhancement on reversible hydrogen storage properties compared with that of pure Mg{sub 2}Ni. Highlights: Black-Right-Pointing-Pointer Tittle La is introduced into Mg{sub 2}Ni alloy without multiphase created. Black-Right-Pointing-Pointer La is introduced into Mg{sub 2}Ni by hydrogen decomposed ball-milling. Black-Right-Pointing-Pointer Reversible hydrogen storage properties at low temperature are improved. Black-Right-Pointing-Pointer Hydrogen storage capacity of composites is beyond 3 wt% at 473 K.},
doi = {10.1016/J.JSSC.2012.02.010},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = . 190,
place = {United States},
year = {2012},
month = {6}
}