气体雾化贮氢电极合金Ml(Ni,Co,Mn,Ti)_5的活化性能

金属学报

1996, Vol. 32

Issue (8): 857-861

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气体雾化贮氢电极合金Ml(Ni,Co,Mn,Ti)_5的活化性能

周煜;雷永泉;罗永春;成少安;王启东;张永昌

北京大学;浙江大学;中国科学院金属研究所

ACTIVATION OF HYDROGEN-STORAGE ELECTRODE ALLOY Ml(Ni,Co,Mn,Ti)_5 PRODUCED BY GAS ATOMIZATION

ZHOU Yu(Peking University; Beijing 100871); LEI Yongquan; LUO Yongchun;CHENG Shao'an; WANG Qidong (Zhejiang University; Hangzhou 310027);ZHANG Yongchang (Institute of Metal Research; Chinese Academy of Sciences;Shenyang 110015) (Manuscript received 1995-09-24; in revised form 1996-04-14)

引用本文:

周煜;雷永泉;罗永春;成少安;王启东;张永昌. 气体雾化贮氢电极合金Ml(Ni,Co,Mn,Ti)_5的活化性能[J]. 金属学报, 1996, 32(8): 857-861.
, , , , , . ACTIVATION OF HYDROGEN-STORAGE ELECTRODE ALLOY Ml(Ni,Co,Mn,Ti)_5 PRODUCED BY GAS ATOMIZATION[J]. Acta Metall Sin, 1996, 32(8): 857-861.

全文: PDF(337 KB)

摘要: 研究了感应熔炼后随炉冷却和经不同处理的气体雾化贮氢电极合金Ｍｌ（Ｎｉ，Ｃｏ，Ｍｎ，Ｔｉ）_５的电化学活化特性．结果表明，氢化前后合金内能的变化是影响活化性能的原因．因表面覆盖氧化膜或任何其它原因所引起的附加内能越大，或氢化时氢原子进入四面体或八面体间隙位置所引起的应变能越大，活化越困难．

关键词 ：贮氢电极合金, 超声气体雾化, 电化学活化

Abstract：The electrochemical activation behaviours of the hydrogenstorage electrode alloys Ml(Ni,Co,Mn,Ti)5 produced by induction melting and then fornace cooling (FC) or Ar-gas atomizing (AGA) have been studied by comparing the activation of AGA electrodes aged at room temperature for 4 months with that of FC electrode. It is found that the surface oxide is only a minor factor to affect the activation, while the magnitude of internal energy change in the alloy before and after hydrogenation is the controlling factor. The increases in the internal energy of the alloy, caused by oxide and the H-atoms entering tetrahedral or octahedral sites during hydrogenation, make the activation difficult. Correspondent:(ZHOU Yu, postdoctor, Department of Chemistry, Peking University, Beijing 100871)

Key words： hydrogen-storage electrode alloy ultrasonic gas atomization electrochemical activation

收稿日期: 1996-08-18

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