Crystal structure, hydrogen absorbing properties and electrode performances of Sc-based Laves phase alloys

M. Yoshida, H. Ishibashi, K. Susa, T. Ogura, Etsuo Akiba

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Crystal structure, hydrogen absorbing and electrode properties of Sc-based Laves phase alloy (ScB2, B2 = Ni1.1Co0.2Mn0.5 Cr0.2) were studied by X-ray powder diffraction, pressure-composition isotherm and electrochemical measurements. Substitution effects of Zr and Y for Sc (Sc0.6Zr0.4B2 and Sc0.6Y0.4B2) on these properties were also studied. ScB2 and Sc0.6Zr0.4B2 contained a C15 Laves phase and a small amount of BCC phase. Sc0.6Y0.4B2 was composed of two kinds of C15 Laves phases with slightly different lattice parameters and orthorhombic phase with YNi-type structure. ScB2 absorbed a large amount of hydrogen up to a hydrogen to metal ratio (H/M, M: total metal) of 0.98 under hydrogen pressure of 4 MPa at 313 K. The hydrogen absorbing capacity was decreased by the substitution of Zr and Y for Sc in ScB2. The ScB2 anode showed a discharge capacity of more than 400 mAh g-1 at initial cycle, but the capacity rapidly decreased with increasing number of charge-discharge cycles. The substitution of Zr and Y for Sc in ScB2 led to the decrease of the discharge capacity, but improved the durability of the electrode.

Original languageEnglish
Pages (from-to)161-165
Number of pages5
JournalJournal of Alloys and Compounds
Volume226
Issue number1-2
DOIs
Publication statusPublished - Aug 1 1995

Fingerprint

Hydrogen
Crystal structure
Electrodes
Substitution reactions
Metals
X ray powder diffraction
Lattice constants
Isotherms
Anodes
Durability
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Crystal structure, hydrogen absorbing properties and electrode performances of Sc-based Laves phase alloys. / Yoshida, M.; Ishibashi, H.; Susa, K.; Ogura, T.; Akiba, Etsuo.

In: Journal of Alloys and Compounds, Vol. 226, No. 1-2, 01.08.1995, p. 161-165.

Research output: Contribution to journalArticle

Yoshida, M. ; Ishibashi, H. ; Susa, K. ; Ogura, T. ; Akiba, Etsuo. / Crystal structure, hydrogen absorbing properties and electrode performances of Sc-based Laves phase alloys. In: Journal of Alloys and Compounds. 1995 ; Vol. 226, No. 1-2. pp. 161-165.
@article{4b312751ac8842939e3c998280ac74d0,
title = "Crystal structure, hydrogen absorbing properties and electrode performances of Sc-based Laves phase alloys",
abstract = "Crystal structure, hydrogen absorbing and electrode properties of Sc-based Laves phase alloy (ScB2, B2 = Ni1.1Co0.2Mn0.5 Cr0.2) were studied by X-ray powder diffraction, pressure-composition isotherm and electrochemical measurements. Substitution effects of Zr and Y for Sc (Sc0.6Zr0.4B2 and Sc0.6Y0.4B2) on these properties were also studied. ScB2 and Sc0.6Zr0.4B2 contained a C15 Laves phase and a small amount of BCC phase. Sc0.6Y0.4B2 was composed of two kinds of C15 Laves phases with slightly different lattice parameters and orthorhombic phase with YNi-type structure. ScB2 absorbed a large amount of hydrogen up to a hydrogen to metal ratio (H/M, M: total metal) of 0.98 under hydrogen pressure of 4 MPa at 313 K. The hydrogen absorbing capacity was decreased by the substitution of Zr and Y for Sc in ScB2. The ScB2 anode showed a discharge capacity of more than 400 mAh g-1 at initial cycle, but the capacity rapidly decreased with increasing number of charge-discharge cycles. The substitution of Zr and Y for Sc in ScB2 led to the decrease of the discharge capacity, but improved the durability of the electrode.",
author = "M. Yoshida and H. Ishibashi and K. Susa and T. Ogura and Etsuo Akiba",
year = "1995",
month = "8",
day = "1",
doi = "10.1016/0925-8388(95)01600-7",
language = "English",
volume = "226",
pages = "161--165",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
number = "1-2",

}

TY - JOUR

T1 - Crystal structure, hydrogen absorbing properties and electrode performances of Sc-based Laves phase alloys

AU - Yoshida, M.

AU - Ishibashi, H.

AU - Susa, K.

AU - Ogura, T.

AU - Akiba, Etsuo

PY - 1995/8/1

Y1 - 1995/8/1

N2 - Crystal structure, hydrogen absorbing and electrode properties of Sc-based Laves phase alloy (ScB2, B2 = Ni1.1Co0.2Mn0.5 Cr0.2) were studied by X-ray powder diffraction, pressure-composition isotherm and electrochemical measurements. Substitution effects of Zr and Y for Sc (Sc0.6Zr0.4B2 and Sc0.6Y0.4B2) on these properties were also studied. ScB2 and Sc0.6Zr0.4B2 contained a C15 Laves phase and a small amount of BCC phase. Sc0.6Y0.4B2 was composed of two kinds of C15 Laves phases with slightly different lattice parameters and orthorhombic phase with YNi-type structure. ScB2 absorbed a large amount of hydrogen up to a hydrogen to metal ratio (H/M, M: total metal) of 0.98 under hydrogen pressure of 4 MPa at 313 K. The hydrogen absorbing capacity was decreased by the substitution of Zr and Y for Sc in ScB2. The ScB2 anode showed a discharge capacity of more than 400 mAh g-1 at initial cycle, but the capacity rapidly decreased with increasing number of charge-discharge cycles. The substitution of Zr and Y for Sc in ScB2 led to the decrease of the discharge capacity, but improved the durability of the electrode.

AB - Crystal structure, hydrogen absorbing and electrode properties of Sc-based Laves phase alloy (ScB2, B2 = Ni1.1Co0.2Mn0.5 Cr0.2) were studied by X-ray powder diffraction, pressure-composition isotherm and electrochemical measurements. Substitution effects of Zr and Y for Sc (Sc0.6Zr0.4B2 and Sc0.6Y0.4B2) on these properties were also studied. ScB2 and Sc0.6Zr0.4B2 contained a C15 Laves phase and a small amount of BCC phase. Sc0.6Y0.4B2 was composed of two kinds of C15 Laves phases with slightly different lattice parameters and orthorhombic phase with YNi-type structure. ScB2 absorbed a large amount of hydrogen up to a hydrogen to metal ratio (H/M, M: total metal) of 0.98 under hydrogen pressure of 4 MPa at 313 K. The hydrogen absorbing capacity was decreased by the substitution of Zr and Y for Sc in ScB2. The ScB2 anode showed a discharge capacity of more than 400 mAh g-1 at initial cycle, but the capacity rapidly decreased with increasing number of charge-discharge cycles. The substitution of Zr and Y for Sc in ScB2 led to the decrease of the discharge capacity, but improved the durability of the electrode.

UR - http://www.scopus.com/inward/record.url?scp=0029357058&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029357058&partnerID=8YFLogxK

U2 - 10.1016/0925-8388(95)01600-7

DO - 10.1016/0925-8388(95)01600-7

M3 - Article

VL - 226

SP - 161

EP - 165

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - 1-2

ER -