La0.6Ce0.4(NiCo0.16-xMn0.1Alx)5(x=0.04,0.06,0.08)合金制备及电化学性能研究

Study on preparation and electrochemical performances of La0.6Ce0.4 (NiCo0.16-xMn0.1Alx)5 (X=0.04,0.06,0.08) hydrogen storage alloy by rapid quenching process

摘要:

采用快淬工艺制备La0 6Ce0.4(NiCo0.16-xMn0.1Alx)5(x=0.04,0.06,0.08)储氢合金,并通过XRD、恒流充放电等测试方法对合金的相结构及电化学性能进行表征.试验结果表明:随着x增大,合金的放电容量下降,高倍率放电性能变差,但合金的循环稳定性得到明显改善;当x=0.08时,以715mA/g电流密度放电,合金循环寿命可以达到205次.交流阻抗测试结果表明,Al部分取代Co,使得电极的交换电流密度降低,以及氢原子在合金电极中的扩散速率减小.

Abstract: