The Effect of C45 Carbon Black-Phosphomolybdic Acid Nanocomposite on Hydrogenation and Corrosion Resistance of La 2 Ni 9 Co Hydrogen Storage Alloy

Krystyna Giza, Edyta Owczarek () and Andrzej Miszczyk
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Krystyna Giza: Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, 42-200 Czestochowa, Poland
Edyta Owczarek: Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, 42-200 Czestochowa, Poland
Andrzej Miszczyk: Chemical Faculty, Gdansk University of Technology, 80-233 Gdansk, Poland

Energies, 2023, vol. 16, issue 10, 1-14

Abstract: In this paper, we analysed the influence of corrosion processes and the addition of a carbon black-heteropoly phosphomolybdic acid (C45-MPA) nanocomposite on the operating parameters of a hydride electrode obtained on the basis of the intermetallic compound La 2 Ni 9 Co. The electrochemical properties of negative electrodes for NiMH batteries were studied using galvanostatic charge/discharge curves, the potentiostatic method, and electrochemical impedance spectroscopy (EIS). The morphology and chemical composition analysis of the studied electrodes were investigated by means of scanning electron microscopy (SEM) with supporting energy-dispersive X-ray analysis (EDS). For more structural information, FTIR analysis was performed. The results indicate that the presence of the C45-MPA nanocomposite in the electrode material increased both the discharge capacity of the hydride electrode and the exchange current density of the H 2 O/H 2 system. The heteropoly acid-modified electrode is also more resistant to high discharge current densities due to its catalytic activity.

Keywords: MH hydride electrode; phosphomolybdic acid; electrochemical characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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