Electrochemical behaviour of multicomponent ZrTiVMnCrNi alloys in alkaline solution

• Published in: Journal of power sources Vol. 58; no. 1; pp. 73 - 78
• Main Authors: Wójcik, Grażyna, Kopczyk, Maciej, Mlynarek, Grażyna, Majchrzyckia, Wlodzimierz, Beltowska-Brzezinska, Maria
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 1996; Elsevier Sequoia
• Subjects: Adsorption isotherms; Alkaline solution; Alloys; Applied sciences; Chromium; Composition effects; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrochemical electrodes; Electrochemistry; Exact sciences and technology; Manganese; Nickel; Scanning electron microscopy; Surface structure; Surface testing; Titanium; Vanadium; X ray diffraction analysis; Zirconium; Zirconium alloys; Zirconium; Alkaline solution; Alloys; Vanadium; Titanium; Chromium; Nickel; Manganese; Electrochemical properties; Multicomponent alloy; Alkaline storage battery; Battery; Electrode material; Metal Hydrides
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/0378-7753(95)02325-9

The effect of the composition of multicomponent ZrTiVMnCrNi alloys on their hydrogen-storage capacity and on the rate of electrosorption/desorption of hydrogen was investigated under potentiodynamic as well as single-pulse and long-term galvanostatic conditions. The main characteristics of alloys and alloy electrodes were determined by their structural analysis by means of X-ray diffraction and scanning electron microscope, by specific surface are tests and by determination of the hydrogen absorption/desorption isotherms in the gas/solid phase system. It was found that only the alloys with a manganese content below a threshold could be used as electrode materials for NiMH batteries, whereas the modification of the electrode material by micro-encapsulation of alloy particles should limit the dissolution of manganese from the electrode material in a strong alkaline solution.