Site preference of cobalt and deuterium in the structure of a complex AB{sub 5} alloy electrode: A neutron powder diffraction study

Journal Article · Fri Jan 01 04:00:00 EST 1999 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1391557· OSTI ID:321125

Vogt, T; Reilly, J J; Johnson, J R; Adzic, G D; McBreen, J ^[1]

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1. Brookhaven National Lab., Upton, NY (United States)

The site preference of cobalt and deuterium in the charged and discharged state of a commercial-type metal hydride anode was investigated by high resolution neutron powder diffraction using an alloy with an altered isotope composition. In the alloy La({sup 58}Ni{sub 0.376} {sup 62}Ni{sub 0.624}){sub 3.55}Co{sub 0.75}Mn{sub 0.33}Al{sub 0.30} the isotope ratio of {sup 58}Ni to {sup 62}Ni leads to a zero neutron scattering length for nickel. Rietveld refinement revealed that Al and Mn occupy the midplane 3g sites of the CaCu{sub 5} structure, while cobalt has a preference for 3g but also occupies the basal plane 2c sites. The space group of the deuteride remains P6/mmm which differs from the parent LaNi{sub 5}D{sub 7} which is P6{sub 3}mc.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY
• Sponsoring Organization: USDOE, Washington, DC (United States); National Inst. of Standards and Technology, Gaithersburg, MD (United States)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 321125
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 1 Vol. 146; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
25 ENERGY STORAGE
36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
COBALT ALLOYS
DEUTERIUM
HYDROGEN STORAGE
LANTHANUM ALLOYS
MANGANESE ALLOYS
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL-HYDROGEN BATTERIES