Title :
Studies on the electrochemical impedance spectroscopy of Zr-based Laves phase metal hydride electrodes
Author :
Chen, J. ; Dou, S.X. ; Bradhurst, D. ; Liu, H.K.
Author_Institution :
Inst. for Mater. Technol. & Manuf., Wollongong Univ., NSW, Australia
Abstract :
The impedance spectra of Zr(V0.4Ni0.6)2 , Zr(V0.2Mn0.2Ni0.6)2, Zr(V0.2Mn0.2Ni0.55Si0.05) 2 alloys for Ni-MH batteries have been investigated. An equivalent circuit for the reaction of an MH electrode is proposed. The results reveal that: (1) the additions of Mn and Si have significant effects on the reaction resistances of the alloys; (2) Ni powder is an appropriate additive material in the manufacturing process of an MH electrode; and (3) the amounts of Ni powder in the alloy electrode also should be considered in the practical utilisation
Keywords :
electric impedance measurement; electrochemical analysis; electrochemical electrodes; manganese alloys; nickel; nickel alloys; secondary cells; silicon alloys; spectroscopy; zirconium alloys; MH electrode reaction; Mn additions; Ni powder; Ni-MH batteries; Si additions; Zr(V0.2Mn0.2Ni0.55Si0.05 )2; Zr(V0.2Mn0.2Ni0.6)2; Zr(V0.4Ni0.6)2; Zr-based Laves phase metal hydride electrodes; electrochemical impedance spectroscopy; equivalent circuit; reaction resistances; Additives; Batteries; Electrochemical impedance spectroscopy; Electrodes; Equivalent circuits; Manganese alloys; Manufacturing processes; Nickel alloys; Powders; Silicon alloys;
Conference_Titel :
Battery Conference on Applications and Advances, 1997., Twelfth Annual
Conference_Location :
Long Beach, CA
Print_ISBN :
0-7803-3631-3
DOI :
10.1109/BCAA.1997.574123
