CAJ | 학술논문

用机械球磨法分别以Ti、B、复合物TiB对非晶态Mg_(45)Ti_3V_2Ni_(50)储氢合金进行了表面修饰.实验结果表明,恰当比例的TiB球磨修饰对镁基储氢合金循环稳定性远好于Ti、B同比例单独修饰合金电极的效果.Mg_(45)Ti_2V_2Ni_(50)与TiB质量比为2:1的Mg_(45)Ti_3V_2Ni_(50)-TiB(2:1)复合合金电极的初始放电容量为529.4 mAh·g~(-1),第50次循环放电容量仍为277.1 mAh·g~(-1).复合物TiB中Ti、B元素之间和复合合金中合金元素与TiB之间产生了金属与非金属的协同作用,导致复合合金新的立体褶皱结构的生成,增强了修饰层与合金问的作用,Mg_(45) Ti_3V_2Ni_(50)-TiB(2:1)合金电极表面活性增强,循环稳定性显著提高.
용궤계구마법분별이Ti、B、복합물TiB대비정태Mg_(45)Ti_3V_2Ni_(50)저경합금진행료표면수식.실험결과표명,흡당비례적TiB구마수식대미기저경합금순배은정성원호우Ti、B동비례단독수식합금전겁적효과.Mg_(45)Ti_2V_2Ni_(50)여TiB질량비위2:1적Mg_(45)Ti_3V_2Ni_(50)-TiB(2:1)복합합금전겁적초시방전용량위529.4 mAh·g~(-1),제50차순배방전용량잉위277.1 mAh·g~(-1).복합물TiB중Ti、B원소지간화복합합금중합금원소여TiB지간산생료금속여비금속적협동작용,도치복합합금신적입체습추결구적생성,증강료수식층여합금문적작용,Mg_(45) Ti_3V_2Ni_(50)-TiB(2:1)합금전겁표면활성증강,순배은정성현저제고.
The surface of an amorphous Mg_(45) Ti_3V_2Ni_(50) alloy was modified with Ti,B,and a specific composite TiB by high energy ball-milling.Experimental results showed that after modification the electrochemical stability of the hydrogen storage alloy improved and the improvement for TiB Was much more than that for Ti or B.The initial only between Ti and B in TiB but also between TiB and the Mg_(45) Ti_3V_2Ni_(50) alloy.This synergistic effect enhanced the interaction between the modified layer and the Mg_(45) Ti_3V_2Ni_(50) alloy.A new stereochemical pleats structure was formed by the synergistic effect between the metal and the nonmetal.The surface activity of the Mg_(45) Ti_3V_2Ni_(50) alloy Was increased and the electrochemical cycling stability improved greatly.