Determination of chemical diffusion coefficients in metal hydride particles with a microelectrode technique

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1837582· OSTI ID:509383

Nishina, Tatsuo; Ura, Hironori; Uchida, Isamu ^[1]

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1. Tohoku Univ., Sendai (Japan)

Microelectrochemical studies for hydrogen storage materials have been carried out by using a microelectrode technique. A carbon fiber filament was contacted with single particles of LaNi{sub 4.5}Al{sub 0.5}, LmNi{sub 4.0}Cr{sub 0.4}Mn{sub 0.3}Al{sub 0.3}, ZrNi{sub 1.4}, ZrMn{sub 0.6}Co{sub 0.1}V{sub 0.2}Ni{sub 1.2}, and ZrMn{sub 0.4}Cr{sub 0.4}Ni{sub 1.2} in 1 M KOH solutions by using a micromanipulator, where Lm indicates the lanthanum-rich rare-earth metal. In this way, cyclic voltammetry and potential step experiments, together with the in situ x-ray diffraction experiments, were conducted and the apparent hydrogen diffusion coefficients in solid phases were determined. The current responses recorded as a function of time were analyzed with a spherical diffusion model and the results are reported herein.

• Sponsoring Organization: USDOE
• OSTI ID: 509383
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 144; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
COBALT ALLOYS
DIFFUSION
HYDROGEN STORAGE
LANTHANUM ALLOYS
MANGANESE ALLOYS
MEASURING METHODS
NICKEL ALLOYS
NICKEL-HYDROGEN BATTERIES
VANADIUM ALLOYS
ZIRCONIUM ALLOYS