Influence of various additives in vanadium-based alloys V3TiNi0.56 on secondary phase formation, hydrogen storage properties and electrode properties

Microstructure, hydrogen storage properties and thermal stabilities of V-Ti-Fe alloys prepared by arc-melting were studied in this work. It was confirmed that V60Ti30Fe10, V70Ti20Fe10 and V80Ti10Fe10 alloys are a body-centered cubic (bcc) single phase, while V75Ti10Fe15 alloy consists of the bcc main phase and C14-typed Laves secondary phase. Experimental results show that the V80Ti10Fe10 alloy reached the largest hydrogen absorption capacities which were about 1.9 wt.% and 1.62 wt.% at 423 K and 473 K, while V75Ti10Fe15 alloy with C14-typed Laves phase showed better hydrogen desorption capacities with 1.31 wt.% at 423 K and 1.35 wt.% at 473 K, respectively. In addition, the DSC measurements indicate that the thermal stability of V75Ti10Fe15 alloy with C14-typed Laves phase decreased, which is very beneficial to the improvement of dehydrogenation rate in the alloy.

Download Full-text

Phase formation of Ce5Co19-type super-stacking structure and its effect on electrochemical and hydrogen storage properties of La0.60M0.20Mg0.20Ni3.80 (M = La, Pr, Nd, Gd) compounds

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2018.07.183 ◽

2018 ◽

Vol 43 (37) ◽

pp. 17809-17820 ◽

Cited By ~ 7

Author(s):

Yumeng Zhao ◽

Shuang Zhang ◽

Xiaoxue Liu ◽

Wenfeng Wang ◽

Lu Zhang ◽

...

Keyword(s):

Hydrogen Storage ◽

Phase Formation ◽

Hydrogen Storage Properties ◽

Stacking Structure ◽

Storage Properties

Download Full-text

Effect of phase formation on hydrogen storage properties in Ti-V-Mn alloys by zirconium substitution

Energy ◽

10.1016/j.energy.2018.10.121 ◽

2019 ◽

Vol 166 ◽

pp. 587-597 ◽

Cited By ~ 5

Author(s):

X.Y. Chen ◽

R.R. Chen ◽

X. Ding ◽

H.Z. Fang ◽

X.Z. Li ◽

...

Keyword(s):

Hydrogen Storage ◽

Phase Formation ◽

Hydrogen Storage Properties ◽

Storage Properties

Download Full-text

Microstructures and Electrochemical Hydrogen Storage Properties of La0.7Ce0.3Ni3.83Mn0.43Co0.25-xAl0.26Cu0.48(Fe0.43B0.57)x Alloys

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.721.59 ◽

2013 ◽

Vol 721 ◽

pp. 59-62

Author(s):

Yu Zhou ◽

Xian Yun Peng ◽

Bao Zhong Liu

Keyword(s):

Hydrogen Storage ◽

Discharge Current ◽

Secondary Phase ◽

High Rate ◽

Electrochemical Characteristics ◽

Hydrogen Storage Alloys ◽

Discharge Current Density ◽

Hydrogen Storage Properties ◽

Electrochemical Hydrogen Storage ◽

Storage Properties

Microstructures and electrochemical characteristics of La0.7Ce0.3Ni3.83Mn0.43Co0.25-x Al0.26Cu0.48(Fe0.43B0.57)x hydrogen storage alloys have been investigated. XRD results indicate that La0.7Ce0.3Ni3.83Mn0.43Co0.25-xAl0.26Cu0.48 alloy is single LiNi5 phase, and the alloys containing Fe0.43B0.57 are composed of LaNi5 matrix phase and La3Ni13B2 secondary phase, and the abundance of the secondary phase gradually increases with increasing Fe0.43B0.57 content. Maximum discharge capacity of the alloy electrodes monotonically decreases from 311.2 mAh/g (x = 0) to 289.6 mAh/g (x = 0.20). High-rate dischargeability at the discharge current density of 1200 mA/g first increases from 53.1% (x = 0) to 64.0% (x = 0.15), and then decreases to 56.5% (x = 0.20).

Download Full-text