کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1271074 | 1497552 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effects of pretreatment on MlNi4.00Co0.45Mn0.38Al0.3 hydrogen storage alloy powders and the performance of 6 Ah prismatic traction battery Effects of pretreatment on MlNi4.00Co0.45Mn0.38Al0.3 hydrogen storage alloy powders and the performance of 6 Ah prismatic traction battery](/preview/png/1271074.png)
This paper investigates the effects of pretreatment of the MlNi4.00Co0.45Mn0.38Al0.3 (Ml: Lanthanum rich misch metal) alloy powders in 12 M NaOH solutions with 0.05 M NaBH4 at 110 °C for 3 h and the performance of 6 Ah prismatic traction battery. The alloy powders are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy with energy dispersive X-ray detector, inductively coupled plasma-atomic emission spectroscopy, laser particle size analyzer and BET chemisorptions analyzer. The electrochemical performance of the battery was effectively improved by the pretreatment of alloy powders with a NaOH/NaBH4 solution. It is found that the discharge efficiencies at 30C at room temperature and at 3C at −20 °C are increased from 5.6% to 88.1% and from 3.7% to 83.7%, respectively. The cycle lifetime at 3C of SOC of 80% is increased from 2200 to 4424. The enhanced performance is attributable to the change of the surface structure and properties of alloy powders by pretreatment.
► The alloy was treated in a 12 M NaOH/0.05 M NaBH4 solution at 110 °C for 3 h.
► The discharge efficiency at 30C of battery was increased from 5.6% to 88.1%.
► The discharge efficiency at 40C at room temperature of battery was 85.00%.
► The discharge efficiency of battery at 3C at −20 °C was increased from 3.7% to 83.7%.
► The cycle lifetime of battery at 3C of SOC of 80% was increased from 2200 to 4424.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 17, September 2012, Pages 12384–12392