Abstract
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 about 150 mAh/g at a discharge rate of C/3. The hydrogen discharge capacity dramatically decreases as MA duration exceeds 20 h.
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