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电化学(中英文) ›› 1995, Vol. 1 ›› Issue (3): 298-304. 

• 研究论文 • 上一篇    下一篇

锆系Laves相储氢合金电极的性能研究

高学平,杨化滨,宋德瑛,张允什,周作祥,张维,申泮文   

  1. 南开大学新能源材料化学研究所
  • 收稿日期:1995-08-28 修回日期:1995-08-28 出版日期:1995-08-28 发布日期:1995-08-28

Properties of Zr-based Laves Phase Hydrogen Storage Electrode

Gao Xueping;Yang Huabin;Song Deying;Zhang Yunshi;Zhou Zuoxiang;Zhang Wei;Shen Panwen   

  1. (Institute of New Enorgy Material Chemistry,Nankai University,Tianjin 300071
  • Received:1995-08-28 Revised:1995-08-28 Published:1995-08-28 Online:1995-08-28

摘要: Zr(V_(0.2)Mn_(0.2)Mo_(0.06)Ni_(0.54))_(2.4)合金经HF溶液处理后,合金表面由富Zr和富Mn层转变成富Ni层,从而使电极初期活化周期明显缩短,电极表面氢吸附性能改善,表面反应电阻减小。本文探讨了上述电极表面反应机理,即表面Ni的催化、氢吸附和氢转移机理。对阻抗谱进行拟合,给出了相应的电极反应等效电路。

关键词: Laves相合金, 储氢电极, 交流阻抗, 循环伏安

Abstract: After treated by HF solution,the surface of Zr(V_(0.2)Mn_(0.2)Ni_(0.54)Mo_(0.06))_(2.4) alloywas transformed from Zr-rich and Mn-rich layer to Ni-rich layer.In this way,the nickel on thesurface could be believed to be the Raney-type nickel, which could obviously shorten the activationcycles,improve electrocatalytic activity and hydrogen adsorption ability.In this paper,the reactionmechanism on the alloy surface(i.e. the mechanism of nickel-catalysis,hydrogen-adsorption andhydrogen-transference)had been investigated.And the impedance spectra were fitted to an equivalentcircuit using a non-linear,least-squares(NLLS)fitting program.

Key words: Laves phase alloy, Hydrogen-storage electrode, Impedance spectra

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