Hydrogen storage properties of LaMgNi 3.6 M 0.4 (M = Ni, Co, Mn, Cu, Al) alloys

Yang, Tai; Zhai, Tingting; Yuan, Zeming; Bu, Wengang; Xu, Sheng; Zhang, Yanghuan

doi:10.1016/j.jallcom.2014.07.206

Cited by 48 publications

(8 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the intrinsic corrosion resistances of various phases in the La-Mg-Ni system are considered to be according with the inverse trend. This result is in agreement with several works where AB 2 -and AB 3 -type La-Mg-Ni alloys have suffered serious corrosion after electrochemical experiments [8,20,21]. The tendency is also exactly identical with that the corrosion resistance is inversely proportional to the abundance of the Mg-rich phases.…”

Section: Intrinsic Anti-corrosion Propertiessupporting

confidence: 92%

“…However, the maximum hydrogen absorption content of La 2 MgNi 9 is slightly lower than that of La 1.5 Mg 0.5 Ni 7 . It is ascribed to existence of (La,Mg)Ni 2 phase in La 2 MgNi 9 since (La,Mg)Ni 2 can hardly absorb and desorb hydrogen at the room temperature [8]. The three alloys have analogous hydrogen absorption plateau.…”

Section: Methodsmentioning

confidence: 98%

“…To date A 2 B 7 -type RE-Mg-Ni alloys have been applied successfully in the commercial Ni/MH batteries [3]. However, AB 2 and AB 3 -type RE-Mg-Ni alloys present poor cycling stability though the theoretical discharge capacities are higher than A 2 B 7 -type alloys [6][7][8]. In addition, A 5 B 19 -type alloys have been reported to possess good electrochemical performances, but the cycling stability still need further development to meet the practical requirements [9,10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Degradation Characters of La-Mg-Ni-Based Metal Hydride Alloys: Corrosion and Pulverization Behaviors

Zhang

Ren

2018

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

Degradation behaviors of three typical La-Mg-Ni alloys, La 2 MgNi 9 , La 1.5 Mg 0.5 Ni 7 and La 4 MgNi 19 , were studied. La 1.5-Mg 0.5 Ni 7 with (La,Mg) 2 Ni 7 as main phase presents better discharge capacity and cycling stability. The three alloys suffer severe pulverization and corrosion after electrochemical cycles, which are considered to be the significant factor attributing to the capacity deterioration. However, the overall corrosion extent of the three cycled alloys aggravates successively, which is inconsistent with the result that La 2 MgNi 9 presented poor cycling stability and also the assumption that alloy with high Mg content is easy to be corroded. The intrinsic anti-corrosion and anti-pulverization characteristics of the three alloys are mainly focused in this work. Immersion corrosion experiments demonstrate that the Mg-rich phases are more easily to be corroded. The corrosion resistance of the three alloys presents an improved trend which is inversely proportional to abundance of the Mg-rich phases. However, the anti-pulverization abilities present an inverse trend, which is closely related to the mechanical property of various phase structures. LaNi 5 with the highest hardness is easy to crack, but the soft (La,Mg)Ni 2 is more resistant to crack formation and spreading. Thus, the weaker corrosion of La 2 MgNi 9 after electrochemical cycling is attributed to the better intrinsic anti-pulverization capability though the anti-corrosion is poor. As La 4 MgNi 19 possesses excellent corrosion resistance, enhancement of the anti-pulverization ability is urgent for improvement in the cycling stability.

show abstract

Section: Intrinsic Anti-corrosion Propertiessupporting

confidence: 92%

Section: Methodsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Degradation Characters of La-Mg-Ni-Based Metal Hydride Alloys: Corrosion and Pulverization Behaviors

Zhang

Ren

2018

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

show abstract

“…The experimental hydrogen was of over 99.999% purity. [19]. Table 1 shows the calculated cell parameters of the LaMgNi 4 and LaNi 5 (or LaAlNi 4 for the M = Al alloy) phases as revealed by XRD.…”

Section: Methodsmentioning

confidence: 99%

Effect of elemental substitution on the structure and hydrogen storage properties of LaMgNi4 alloy

Yang

Yuan

et al. 2016

Materials & Design

Self Cite

View full text Add to dashboard Cite

“…And as the negative electrode materials, its electrocatalytic activity is so poor that it almost cannot electrochemically absorb and desorb hydrogen at room temperature and ambient pressure. With the aim of overcoming these shortcomings, numerous solutions, particularly mechanical alloying (MA) [5,6], melt spinning [7], surface modification [8], alloying with other elements [9] and adding catalyst [10], have been investigated. It is well known that the specific capacity and hydriding/dehydriding kinetics of hydride electrode materials depend on their chemical composition and crystalline structure [11].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen storage performances of LaMg11Ni +xwt% Ni (x= 100, 200) alloys prepared by mechanical milling

Zhang

Wang

Zhai

et al. 2015

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

Hydrogen storage properties of LaMgNi 3.6 M 0.4 (M = Ni, Co, Mn, Cu, Al) alloys

Cited by 48 publications

References 34 publications

Degradation Characters of La-Mg-Ni-Based Metal Hydride Alloys: Corrosion and Pulverization Behaviors

Degradation Characters of La-Mg-Ni-Based Metal Hydride Alloys: Corrosion and Pulverization Behaviors

Effect of elemental substitution on the structure and hydrogen storage properties of LaMgNi4 alloy

Hydrogen storage performances of LaMg11Ni +xwt% Ni (x= 100, 200) alloys prepared by mechanical milling

Contact Info

Product

Resources

About