Structures and electrochemical hydrogen storage characteristics of La0.75−xPrxMg0.25Ni3.2Co0.2Al0.1 (x=0–0.4) alloys prepared by melt spinning

2009 ◽  
Vol 485 (1-2) ◽  
pp. 333-339 ◽  
Author(s):  
Yang-huan Zhang ◽  
Bao-wei Li ◽  
Hui-ping Ren ◽  
Shi-hai Guo ◽  
Qi Yan ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Melt Spinning ◽  
Electrochemical Hydrogen Storage ◽  
Storage Characteristics

Electrochemical hydrogen storage characteristics of La0.75−x M x Mg0.25Ni3.2Co0.2Al0.1 (M = Zr, Pr; x = 0, 0.1) alloys prepared by melt spinning

Rare Metals ◽  
2012 ◽  
Vol 31 (5) ◽  
pp. 457-465 ◽  
Author(s):  
Yanghuan Zhang ◽  
Tai Yang ◽  
Ying Cai ◽  
Zhonghui Hou ◽  
Huiping Ren ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Melt Spinning ◽  
Electrochemical Hydrogen Storage ◽  
Storage Characteristics

The Electrochemical Hydrogen Storage Characteristics of La0.75−xZrxMg0.25Ni3.2Co0.2Al0.1 (x = 0–0.2) Alloys Prepared by Melt Spinning

2012 ◽  
Vol 15 (1) ◽  
pp. 373-377
Author(s):  
Yang-Huan Zhang ◽  
Xiao-Gang Liu ◽  
Le-Le Chen ◽  
Hui-Ping Ren ◽  
Ying Cai ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Melt Spinning ◽  
Electrochemical Hydrogen Storage ◽  
Storage Characteristics

Electrochemical hydrogen storage characteristics of nanocrystalline Mg20Ni10−xCux (x=0–4) alloys prepared by melt-spinning

2010 ◽  
Vol 491 (1-2) ◽  
pp. 589-594 ◽  
Author(s):  
Yang-huan Zhang ◽  
Dong-liang Zhao ◽  
Bao-wei Li ◽  
Hui-ping Ren ◽  
Shi-hai Guo ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Melt Spinning ◽  
Electrochemical Hydrogen Storage ◽  
Storage Characteristics

Enhanced Electrochemical Hydrogen Storage Characteristics of the as-Spun Mg2Ni-Type Alloys by Substituting Ni with M (M=Cu, Co)

2012 ◽  
Vol 457-458 ◽  
pp. 572-577
Author(s):  
Yang Huan Zhang ◽  
Bao Wei Li ◽  
Hui Ping Ren ◽  
Zai Guang Pang ◽  
Zhong Hui Hou ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Melt Spinning ◽  
Nanocrystalline Structure ◽  
Amorphous Structure ◽  
High Rate ◽  
Electrochemical Performances ◽  
Secondary Phases ◽  
Nanocrystalline And Amorphous ◽  
Electrochemical Hydrogen Storage ◽  
Rate Discharge

Mg2Ni-type Mg20Ni10-xMx (M=Cu, Co; x=0, 1, 2, 3, 4) electrode alloys with nanocrystalline and amorphous structure were synthesized by melt-spinning technique. The microstructures of the as-spun alloys were characterized by XRD, SEM and HRTEM. The electrochemical hydrogen storage properties of the experimental alloys were measured. The obtained results show that the as-spun (M=Cu) alloys hold an entire nanocrystalline structure, whereas the as-spun (M=Co) alloys display a nanocrystalline and amorphous structure, confirming that the substitution of Co for Ni facilitates the glass formation in the Mg2Ni-type alloy. Furthermore, such substitution results in the formation of secondary phases Mg2Cu and MgCo2 instead of changing the major phase of Mg2Ni. The substitution of M (M=Cu, Co) for Ni markedly improves the electrochemical performances of the alloys, involving the discharge capacity and the cycle stability as well as the high rate discharge ability.

Improved the Physical and Electrochemical Hydrogen Storage Kinetics of Mg2Ni-Type Alloys by Substituting Ni with Co and Melt Spinning

2011 ◽  
Vol 415-417 ◽  
pp. 1565-1571
Author(s):  
Zhi Hong Ma ◽  
Bo Li ◽  
Dong Liang Zhao ◽  
Hui Ping Ren ◽  
Guo Fang Zhang ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Melt Spinning ◽  
Nanocrystalline Structure ◽  
Secondary Phase ◽  
Amorphous Structure ◽  
Co Substitution ◽  
Hydrogen Storage Kinetics ◽  
Nanocrystalline And Amorphous ◽  
Electrochemical Hydrogen Storage ◽  
Kinetics Of

In this paper, melt-spinning technology was used for preparing Mg20Ni10-xCox (x = 0, 1, 2, 3, 4) hydrogen storage alloys. The influences of both the Co substitution and the melt spinning on the the physical and electrochemical hydrogen storage kinetics of the alloys were investigated. The XRD, SEM and TEM characterization exhibits that the as-spun Co-free alloy holds a typical nanocrystalline structure, whereas the as-spun alloys substituted by Co display a nanocrystalline and amorphous structure, confirming that the substitution of Co for Ni facilitates the glass formation in the Mg2Ni-type alloy. The Co substitution gives rise to forming secondary phase MgCo2 without altering the Mg2Ni major phase of the alloys. The measurement of the physical and electrochemical hydrogen storage kinetics of the alloys shows that both the melt spinning and the substitution of Co for Ni markedly improve the physical hydriding and dehydriding kinetics and the electrochmeical kinetics (HRD) of the alloys.

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