Effect of fluorination on the lanthanum-doped AB2-type metal hydride electrodes

H. Y. Park; W. I. Cho; B. W. Cho; S. R. Lee; K. S. Yun

doi:10.1016/S0378-7753(00)00527-9

Effect of fluorination on the lanthanum-doped AB₂-type metal hydride electrodes

H. Y. Park, W. I. Cho, B. W. Cho, S. R. Lee, K. S. Yun

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

The effect of fluorination on the surface of an AB₂-type hydrogen-storage alloy with the composition Zr_0.7Ti_0.3V_0.4Mn_0.4Ni_1.2 is investigated. Electron probe microanalysis (EPMA), scanning electron microscopy (SEM), Auger electron spectroscopy (AES), and X-ray diffraction (XRD) techniques show that the fluorinated AB₂-type alloys have a unique surface morphology and high reactivity with a protective film. The treatment is found to be effective when lanthanum is incorporated in the alloy. The cycle-life of the metal hydride (MH) increases significantly as a result of a decrease in the overpotential by electrode polarization. The degradation rate of the MH electrode is less than 3% after 100 cycles when lanthanum is added at 1-3 wt.%.

Original language	English
Pages (from-to)	149-156
Number of pages	8
Journal	Journal of Power Sources
Volume	92
Issue number	1-2
DOIs	https://doi.org/10.1016/S0378-7753(00)00527-9
Publication status	Published - 2001 Jan

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/S0378-7753(00)00527-9

Cite this

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title = "Effect of fluorination on the lanthanum-doped AB2-type metal hydride electrodes",

abstract = "The effect of fluorination on the surface of an AB2-type hydrogen-storage alloy with the composition Zr0.7Ti0.3V0.4Mn0.4Ni1.2 is investigated. Electron probe microanalysis (EPMA), scanning electron microscopy (SEM), Auger electron spectroscopy (AES), and X-ray diffraction (XRD) techniques show that the fluorinated AB2-type alloys have a unique surface morphology and high reactivity with a protective film. The treatment is found to be effective when lanthanum is incorporated in the alloy. The cycle-life of the metal hydride (MH) increases significantly as a result of a decrease in the overpotential by electrode polarization. The degradation rate of the MH electrode is less than 3% after 100 cycles when lanthanum is added at 1-3 wt.%.",

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AU - Park, H. Y.

AU - Cho, W. I.

AU - Cho, B. W.

AU - Lee, S. R.

AU - Yun, K. S.

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N2 - The effect of fluorination on the surface of an AB2-type hydrogen-storage alloy with the composition Zr0.7Ti0.3V0.4Mn0.4Ni1.2 is investigated. Electron probe microanalysis (EPMA), scanning electron microscopy (SEM), Auger electron spectroscopy (AES), and X-ray diffraction (XRD) techniques show that the fluorinated AB2-type alloys have a unique surface morphology and high reactivity with a protective film. The treatment is found to be effective when lanthanum is incorporated in the alloy. The cycle-life of the metal hydride (MH) increases significantly as a result of a decrease in the overpotential by electrode polarization. The degradation rate of the MH electrode is less than 3% after 100 cycles when lanthanum is added at 1-3 wt.%.

AB - The effect of fluorination on the surface of an AB2-type hydrogen-storage alloy with the composition Zr0.7Ti0.3V0.4Mn0.4Ni1.2 is investigated. Electron probe microanalysis (EPMA), scanning electron microscopy (SEM), Auger electron spectroscopy (AES), and X-ray diffraction (XRD) techniques show that the fluorinated AB2-type alloys have a unique surface morphology and high reactivity with a protective film. The treatment is found to be effective when lanthanum is incorporated in the alloy. The cycle-life of the metal hydride (MH) increases significantly as a result of a decrease in the overpotential by electrode polarization. The degradation rate of the MH electrode is less than 3% after 100 cycles when lanthanum is added at 1-3 wt.%.

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