Various ways including substitution and protection used to improve the cyclability of 'MgNi' electrode

M. Pasturel; J. L. Bobet; B. Chevalier

doi:10.1016/S0925-8388(03)00250-0

Various ways including substitution and protection used to improve the cyclability of 'MgNi' electrode

M. Pasturel, J. L. Bobet, B. Chevalier

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Abstract

Three different treatments have been investigated to improve the cyclability in KOH electrolyte of ‘MgNi’ used as hydrogen storage electrode material for Ni–MH batteries. Whereas hydrophobic molecule grafting does not give significant improvement, replacement of Mg by Ti or coating the ‘MgNi’ powder with copper in a supercritical CO2–EtOH mixture increase strongly the resistance of the electrode against hydroxylation: the capacity after 12 cycles is 98% higher for ‘Mg0.5Ti0.5Ni’ and 45% higher after coating by a thin copper film in comparison with the raw ‘MgNi’ material.

Original language	English
Pages (from-to)	764-767
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	356/357
Early online date	1 Apr 2003
DOIs	https://doi.org/10.1016/S0925-8388(03)00250-0
Publication status	Published - 11 Aug 2003

Bibliographical note

Part of special issue: Proceedings of the Eighth International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications (MH2002). Edited by A. Percheron-Guegan, M. Gupta

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title = "Various ways including substitution and protection used to improve the cyclability of 'MgNi' electrode",

abstract = "Three different treatments have been investigated to improve the cyclability in KOH electrolyte of {\textquoteleft}MgNi{\textquoteright} used as hydrogen storage electrode material for Ni–MH batteries. Whereas hydrophobic molecule grafting does not give significant improvement, replacement of Mg by Ti or coating the {\textquoteleft}MgNi{\textquoteright} powder with copper in a supercritical CO2–EtOH mixture increase strongly the resistance of the electrode against hydroxylation: the capacity after 12 cycles is 98% higher for {\textquoteleft}Mg0.5Ti0.5Ni{\textquoteright} and 45% higher after coating by a thin copper film in comparison with the raw {\textquoteleft}MgNi{\textquoteright} material.",

author = "M. Pasturel and Bobet, {J. L.} and B. Chevalier",

note = "Part of special issue: Proceedings of the Eighth International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications (MH2002). Edited by A. Percheron-Guegan, M. Gupta",

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doi = "10.1016/S0925-8388(03)00250-0",

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AU - Pasturel, M.

AU - Bobet, J. L.

AU - Chevalier, B.

N1 - Part of special issue: Proceedings of the Eighth International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications (MH2002). Edited by A. Percheron-Guegan, M. Gupta

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Y1 - 2003/8/11

N2 - Three different treatments have been investigated to improve the cyclability in KOH electrolyte of ‘MgNi’ used as hydrogen storage electrode material for Ni–MH batteries. Whereas hydrophobic molecule grafting does not give significant improvement, replacement of Mg by Ti or coating the ‘MgNi’ powder with copper in a supercritical CO2–EtOH mixture increase strongly the resistance of the electrode against hydroxylation: the capacity after 12 cycles is 98% higher for ‘Mg0.5Ti0.5Ni’ and 45% higher after coating by a thin copper film in comparison with the raw ‘MgNi’ material.

AB - Three different treatments have been investigated to improve the cyclability in KOH electrolyte of ‘MgNi’ used as hydrogen storage electrode material for Ni–MH batteries. Whereas hydrophobic molecule grafting does not give significant improvement, replacement of Mg by Ti or coating the ‘MgNi’ powder with copper in a supercritical CO2–EtOH mixture increase strongly the resistance of the electrode against hydroxylation: the capacity after 12 cycles is 98% higher for ‘Mg0.5Ti0.5Ni’ and 45% higher after coating by a thin copper film in comparison with the raw ‘MgNi’ material.

U2 - 10.1016/S0925-8388(03)00250-0

DO - 10.1016/S0925-8388(03)00250-0

M3 - Article

VL - 356/357

SP - 764

EP - 767

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -

Various ways including substitution and protection used to improve the cyclability of 'MgNi' electrode

Abstract

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