JOURNAL of the Tunisian Chemical Society

serving the Research, the Education and the Industry

LaCaMgNi9 synthesized by mechanical alloying: Structural and electrochemical characterization

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The performance of a nickel-metal hydride (Ni-MH) battery mainly depends on the characteristics of the negative electrode. The electrochemical characteristics of mechanically alloyed compound LaCaMgNi9 , including the discharge capacity and the hydrogen diffusion coefficient, were studied as function of mechanical alloying (MA) conditions. The electrochemical measurements show that the LaCaMgNi9 electrode has a maximum discharge capacity of 150 mAh/g at a discharge rate of C/3. The hydrogen discharge capacity decreases dramatically when the MA exceeds 20h.

S. Chebab, M. Abdellaoui, M. Latroche, V. Paul-Boncour

AB3-type alloy, mechanical alloying, electrochemical characteristics

Pages 52-59

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