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buzhiweihe

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文章題目：Highly improved electrochemical hydrogen storage performances of the Nd–Cu–added Mg2Ni-type alloys by melt spinning
期刊：Journal of Alloys and Compounds
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buzhiweihe: 金幣+10, ★★★很有幫助 2014-12-10 11:22:48

WOS:000327135400012

參見：
FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Zhang, YH
Li, C
Cai, Y
Hu, F
Liu, ZC
Guo, SH
AF Zhang, Yanghuan
Li, Can
Cai, Ying
Hu, Feng
Liu, Zhuocheng
Guo, Shihai
TI Highly improved electrochemical hydrogen storage performances of the Nd-Cu-added Mg2Ni-type alloys by melt spinning
SO JOURNAL OF ALLOYS AND COMPOUNDS
AB In order to improve the electrochemical hydrogen storage performances of the Mg2Ni-type alloy, Nd and Cu were added jointly. The (Mg24Ni10Cu2)(100) Nd-x(x) (x = 0, 5, 10, 15, 20) alloys with nanocrystalline and amorphous structure were fabricated by melt-spinning technique. The effects of spinning rate and Nd content on the structures and electrochemical hydrogen storage performances of the alloys were investigated. The structure characterizations of XRD, TEM and SEM linked with EDS reveal that the as-cast (x = 15) alloy holds a multiphase structure, containing Mg2Ni major phase as well as some secondary phases Mg6Ni, Nd5Mg41 and NdNi. The as-spun Nd-free alloy displays an entire nanocrystalline structure, whereas the as-spun Nd-added alloys hold a nanocrystalline and amorphous structure, meanwhile, the degree of amorphization visibly increases with both spinning rate and Nd content rising, suggesting that the addition of Nd facilitates the glass forming of the Mg2Ni-type alloys. Furthermore, the addition of Nd and melt spinning dramatically improve the electrochemical hydrogen storage performances of the alloys. The discharge capacity and cycle stability of the alloys conspicuously augment with spinning rate growing. When the spinning rate rises from 0 (The as-cast was defined as the spinning rate of 0 m/s) to 40 m/s, the discharge capacity of the (x = 10) alloy is enhanced from 86.4 to 452.8 mA h/g, and capacity maintain rate (S-20) (the capacity maintain rate at 20th cycle) from 53.2% to 89.7%, respectively. (C) 2013 Elsevier B. V. All rights reserved.
SN 0925-8388
EI 1873-4669
PD JAN 25
PY 2014
VL 584
BP 81
EP 86
DI 10.1016/j.jallcom.2013.09.019
UT WOS:000327135400012
ER
EF

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