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Effect of Sn substitution for Co on microstructure and electrochemical performance of AB5 type La0.7Mg0.3Al0.3Mn0.4Co0.5−xSnxNi3.8 (x =0−0.5) alloys

Journal Article


Abstract


  • The effects of substitution of Sn for Co on the microstructure, hydrogen storage and electrochemical discharge capacity of La0.7Mg0.3Al0.3Mn0.4Co0.5–xSnxNi3.8 (x=0, 0.1, 0.2, 0.3 and 0.5) alloys were investigated using X-ray diffraction (XRD), pressure composition isotherm (PCT) and electrochemical discharge cycle. XRD, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) tests showed that all of alloys are mainly composed of LaNi5 and MgNi2 phases, but when increasing the content of Sn in alloys, the LaNiSn phase appears and microstructure is refined. The PCT showed that increasing substitution of Sn for Co results in decrease of the maximum hydrogen storage capacity from 1.48% (x=0) to 0.85% (x=0.5). The electrochemical tests indicated that the maximum discharge capacity decreases from 337.1 mA·h/g (x=0) to 239.8 mA·h/g (x=0.5); however, the discharge capacity retention at the 100th cycle increases from 70.2% (x=0) to 78.0% (x=0.5).

UOW Authors


  •   Casini, Julio Cesar Serafim. (external author)
  •   Guo, Zaiping
  •   Liu, Hua
  •   Ferreira, Eliner Affonso (external author)
  •   Faria, Rubens Nunes (external author)
  •   Takiishi, Hidetoshi (external author)

Publication Date


  • 2015

Citation


  • Casini, J., Guo, Z., Liu, H. Kun., Ferreira, E., Faria, R. & Takiishi, H. (2015). Effect of Sn substitution for Co on microstructure and electrochemical performance of AB5 type La0.7Mg0.3Al0.3Mn0.4Co0.5−xSnxNi3.8 (x =0−0.5) alloys. Nonferrous Metals Society of China Transactions, 25 (2), 520-526.

Scopus Eid


  • 2-s2.0-84924993913

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1457

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 520

End Page


  • 526

Volume


  • 25

Issue


  • 2

Place Of Publication


  • China

Abstract


  • The effects of substitution of Sn for Co on the microstructure, hydrogen storage and electrochemical discharge capacity of La0.7Mg0.3Al0.3Mn0.4Co0.5–xSnxNi3.8 (x=0, 0.1, 0.2, 0.3 and 0.5) alloys were investigated using X-ray diffraction (XRD), pressure composition isotherm (PCT) and electrochemical discharge cycle. XRD, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) tests showed that all of alloys are mainly composed of LaNi5 and MgNi2 phases, but when increasing the content of Sn in alloys, the LaNiSn phase appears and microstructure is refined. The PCT showed that increasing substitution of Sn for Co results in decrease of the maximum hydrogen storage capacity from 1.48% (x=0) to 0.85% (x=0.5). The electrochemical tests indicated that the maximum discharge capacity decreases from 337.1 mA·h/g (x=0) to 239.8 mA·h/g (x=0.5); however, the discharge capacity retention at the 100th cycle increases from 70.2% (x=0) to 78.0% (x=0.5).

UOW Authors


  •   Casini, Julio Cesar Serafim. (external author)
  •   Guo, Zaiping
  •   Liu, Hua
  •   Ferreira, Eliner Affonso (external author)
  •   Faria, Rubens Nunes (external author)
  •   Takiishi, Hidetoshi (external author)

Publication Date


  • 2015

Citation


  • Casini, J., Guo, Z., Liu, H. Kun., Ferreira, E., Faria, R. & Takiishi, H. (2015). Effect of Sn substitution for Co on microstructure and electrochemical performance of AB5 type La0.7Mg0.3Al0.3Mn0.4Co0.5−xSnxNi3.8 (x =0−0.5) alloys. Nonferrous Metals Society of China Transactions, 25 (2), 520-526.

Scopus Eid


  • 2-s2.0-84924993913

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1457

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 520

End Page


  • 526

Volume


  • 25

Issue


  • 2

Place Of Publication


  • China