Effect of the temperature on electrode performance of the as cast LaMg(NiMnCo) alloy.

A series of experiments were performed to investigate the effect of the temperature on electrode performance of the as-cast LaMg(NiMnCo) alloy. XRD and SEM show that LaMg(NiMnCo) alloy has LaNi and LaNi phase. The activation curves show that the as-cast LaMg(NiMnCo) alloy electrode can be activated in three times and the maximum discharge capacity is 358.74 mA h/g at 273 K. With increasing the temperature, the cyclic stability of the alloy electrode decreases obviously. And the capacity retention decreases from 96.14 to 63.53% when the temperature increases from 238 to 303 K. It also can be seen that the as-cast LaMg(NiMnCo) alloy electrode has the best self-discharge ability at 238 K and the best high-rate discharge ability at 273 K. [ABSTRACT FROM AUTHOR]