Effect of Phase Composition and Activation of a Titanium Nickelide Surface by Electrochemical Cycling on Its Hydrogen Sorption Capacity

We have studied the electrochemical properties of electrodes based on the intermetallic TiNi, obtained by powder metallurgy, with an austenite and martensite structure. The electrochemical and capacity characteristics of the electrodes were determined from the charging curve under nonequilibrium con...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics, Vol. 44, No. 7/8 (2005), p. 389-395
Main Author: Shcherbakova, G.
Other Involved Persons: Solonin, M. ; Kolomiets, L. ; Katashinskii, P.
Format: electronic Article
Language:English
ISSN:1573-9066
Item Description:__________ Translated from Poroshkovaya Metallurgiya, Nos. 7–8(444), pp. 99–106, July–August, 2005.
Physical Description:Online-Ressource
DOI:10.1007/s11106-005-0108-0
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  • We have studied the electrochemical properties of electrodes based on the intermetallic TiNi, obtained by powder metallurgy, with an austenite and martensite structure. The electrochemical and capacity characteristics of the electrodes were determined from the charging curve under nonequilibrium conditions, and also from the cyclic voltammetric curve in alkaline medium. We have studied the structural and phase changes during absorption - desorption of hydrogen and the effect of the structure on activation and the hydrogen sorption capacity. We have shown that electrodes made from titanium nickelide with a two-phase structure (austenite, martensite) are easily activated and have a higher hydrogen capacity than electrodes with a single-phase austenite structure.