CAJ | 학술논문

采用真空电弧熔炼和热处理方法制备了La1-x Cex Ni3．54 CO0．78 Mn0．35 A10．32（x=0．1，0．2，0．3，0．4，0．5，0．6）贮氢合金．x射线衍射（XRD）分析表明，合金含有单-CaCu5型六方结构相．电化学性能测试表明，随着x的增加，合金的最大放电容量从348．1mAh／g（x=0．1）单调地减小到310．1mAh／g（x=0．6）；HRD1200先从28．6％（x=0．1）增加到65．4％（x=0．5）然后降低到60．1％（x=0．6），归因于合金表面的电催化活性和合金体内氢原子扩散速率均随z的增大先增大后减小．
채용진공전호용련화열처리방법제비료La1-x Cex Ni3．54 CO0．78 Mn0．35 A10．32（x=0．1，0．2，0．3，0．4，0．5，0．6）저경합금．x사선연사（XRD）분석표명，합금함유단-CaCu5형륙방결구상．전화학성능측시표명，수착x적증가，합금적최대방전용량종348．1mAh／g（x=0．1）단조지감소도310．1mAh／g（x=0．6）；HRD1200선종28．6％（x=0．1）증가도65．4％（x=0．5）연후강저도60．1％（x=0．6），귀인우합금표면적전최화활성화합금체내경원자확산속솔균수z적증대선증대후감소．
The hydrogen storage alloys La1- x Ce Ni3.54 Coo. 78 Mn0 35 A10.32 （ x = 0. 1,0.2,0. 3,0.4,0.5,0.6 ） were synthesized by induction melting and heat treatment. XRD analysis indicated that the alloys consisted of a single CaCu5 -type phase. The electrochemical performance test showed that with increasing x value, the maximum discharge capacity decreased monotonically from 348.1 to 310. 1 mAh/g. For the discharge current density of 1200 mA/g, the HRD of the alloy electrode first increased from 28.6% （x = O. 1 ） to 65.4% （x = 0.5） , and then decreased to 60. 1% （x = O. 6）. This was mainly attributed to the electrocatalytic activity for charge - transfer reaction at the electrode/electrolyte interface and the hydrogen diffusion in the bulk of alloys, which increased first and then decreased.