Impedance Characterization of Hydrogen Adsorption-Absorption into an Mg2Ni Alloy Single Particle Electrode

M. Mohamedi; T. Sato; T. Itoh; M. Umeda; I. Uchida

Impedance Characterization of Hydrogen Adsorption-Absorption into an Mg₂Ni Alloy Single Particle Electrode

M. Mohamedi, T. Sato, T. Itoh, M. Umeda, I. Uchida

Advanced Interdisciplinary Research Division

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

Abstract

Simple electroless solutions plating have been applied to Mg₂Ni alloy: (i) Ni-plating solution using NiSO₄+NaPH₂O₂+NaH₂C ₆H₅O₇, (ii) a reducing solution using NaPH₂O₂+NaH₂C₆H₅O ₇, and (iii) acid solution consisting of CuSO₄+H₂SO₄. The electrochemical characteristics and performance of thus modified electrodes were examined using cyclic voltammetry, and electrochemical impedance spectroscopy techniques with the microelectrode technique focusing on a single particle of the alloy. The results show that all applied surface modifications have significantly improved the electrocatalytic activity of the Mg₂Ni towards hydrogen absorption/adsorption processes compared to the untreated alloy. Among all the treated samples, the highest discharge capacity of 320 mAh/g, and the lowest charge-transfer resistance were obtained with Mg₂Ni alloy treated by copper plating method.

Original language	English
Pages (from-to)	197-202
Number of pages	6
Journal	Journal of New Materials for Electrochemical Systems
Volume	5
Issue number	3
Publication status	Published - 2002 Dec 1

Keywords

MgNi alloy
Rechargeable metal hydride battery
Single particle electrode
Surface modification

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Materials Science(all)
Electrochemistry

UN SDGs

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

Cite this

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title = "Impedance Characterization of Hydrogen Adsorption-Absorption into an Mg2Ni Alloy Single Particle Electrode",

abstract = "Simple electroless solutions plating have been applied to Mg2Ni alloy: (i) Ni-plating solution using NiSO4+NaPH2O2+NaH2C 6H5O7, (ii) a reducing solution using NaPH2O2+NaH2C6H5O 7, and (iii) acid solution consisting of CuSO4+H2SO4. The electrochemical characteristics and performance of thus modified electrodes were examined using cyclic voltammetry, and electrochemical impedance spectroscopy techniques with the microelectrode technique focusing on a single particle of the alloy. The results show that all applied surface modifications have significantly improved the electrocatalytic activity of the Mg2Ni towards hydrogen absorption/adsorption processes compared to the untreated alloy. Among all the treated samples, the highest discharge capacity of 320 mAh/g, and the lowest charge-transfer resistance were obtained with Mg2Ni alloy treated by copper plating method.",

keywords = "MgNi alloy, Rechargeable metal hydride battery, Single particle electrode, Surface modification",

author = "M. Mohamedi and T. Sato and T. Itoh and M. Umeda and I. Uchida",

year = "2002",

month = dec,

day = "1",

language = "English",

volume = "5",

pages = "197--202",

journal = "Journal of New Materials for Electrochemical Systems",

issn = "1480-2422",

publisher = "Ecole Polytechnique de Montreal",

number = "3",

}

TY - JOUR

T1 - Impedance Characterization of Hydrogen Adsorption-Absorption into an Mg2Ni Alloy Single Particle Electrode

AU - Mohamedi, M.

AU - Sato, T.

AU - Itoh, T.

AU - Umeda, M.

AU - Uchida, I.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - Simple electroless solutions plating have been applied to Mg2Ni alloy: (i) Ni-plating solution using NiSO4+NaPH2O2+NaH2C 6H5O7, (ii) a reducing solution using NaPH2O2+NaH2C6H5O 7, and (iii) acid solution consisting of CuSO4+H2SO4. The electrochemical characteristics and performance of thus modified electrodes were examined using cyclic voltammetry, and electrochemical impedance spectroscopy techniques with the microelectrode technique focusing on a single particle of the alloy. The results show that all applied surface modifications have significantly improved the electrocatalytic activity of the Mg2Ni towards hydrogen absorption/adsorption processes compared to the untreated alloy. Among all the treated samples, the highest discharge capacity of 320 mAh/g, and the lowest charge-transfer resistance were obtained with Mg2Ni alloy treated by copper plating method.

AB - Simple electroless solutions plating have been applied to Mg2Ni alloy: (i) Ni-plating solution using NiSO4+NaPH2O2+NaH2C 6H5O7, (ii) a reducing solution using NaPH2O2+NaH2C6H5O 7, and (iii) acid solution consisting of CuSO4+H2SO4. The electrochemical characteristics and performance of thus modified electrodes were examined using cyclic voltammetry, and electrochemical impedance spectroscopy techniques with the microelectrode technique focusing on a single particle of the alloy. The results show that all applied surface modifications have significantly improved the electrocatalytic activity of the Mg2Ni towards hydrogen absorption/adsorption processes compared to the untreated alloy. Among all the treated samples, the highest discharge capacity of 320 mAh/g, and the lowest charge-transfer resistance were obtained with Mg2Ni alloy treated by copper plating method.

KW - MgNi alloy

KW - Rechargeable metal hydride battery

KW - Single particle electrode

KW - Surface modification

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