Hydrogen sorption and corrosion properties of La2Ni9CoSn0.2 alloy
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Krystyna Giza
Abstract
The hydrogenation and corrosion behaviour of La2Ni9 · CoSn0.2 alloy was analysed in respect of its use in Ni–MH batteries. It has been proved that the presence of tin in the alloy causes a decrease in hydrogen equilibrium pressure. In the electrochemical studies several techniques, such as chronopotentiometry, multi-potential steps, linear sweep voltammetry and the potentiokinetic polarization were applied to characterize the electrochemical properties of a La2Ni9CoSn0.2 powder composite electrode. During long cycling, powder particles undergo micro-cracking or other forms of surface development causing a progressive increase in the exchange current density of the H2O/H2 system, but, on the other hand, this increase favours corrosion processes such as the electrode material's oxidation. This is also reflected in the capacity loss values.
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© 2018, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Phase-field simulation of the solidified microstructure in a new commercial 6××× aluminum alloy ingot supported by experimental measurements
- Hydrogen sorption and corrosion properties of La2Ni9CoSn0.2 alloy
- Isothermal sections of the Co–Ni–Ti system at 950 and 1 000 °C
- Experimental and theoretical study of temperature-dependent variable stiffness of magnetorheological elastomers
- Photocatalytic properties of nano-structured carbon nitride: a comparison with bulk graphitic carbon nitride
- Effects of solution treatment on mechanical properties and corrosion resistance of 4A duplex stainless steel
- Three-body abrasive wear behaviour of metastable spheroidal carbide cast irons with different chromium contents
- Intermetallic precipitation in rare earth-treated A413.1 alloy: A metallographic study
- Short Communications
- Microstructure and magnetic properties of iron–cobalt-based alloys processed by metal injection moulding
- Solid-state synthesis and magnetic properties of rhombohedral phase Mg2SiNi3
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Phase-field simulation of the solidified microstructure in a new commercial 6××× aluminum alloy ingot supported by experimental measurements
- Hydrogen sorption and corrosion properties of La2Ni9CoSn0.2 alloy
- Isothermal sections of the Co–Ni–Ti system at 950 and 1 000 °C
- Experimental and theoretical study of temperature-dependent variable stiffness of magnetorheological elastomers
- Photocatalytic properties of nano-structured carbon nitride: a comparison with bulk graphitic carbon nitride
- Effects of solution treatment on mechanical properties and corrosion resistance of 4A duplex stainless steel
- Three-body abrasive wear behaviour of metastable spheroidal carbide cast irons with different chromium contents
- Intermetallic precipitation in rare earth-treated A413.1 alloy: A metallographic study
- Short Communications
- Microstructure and magnetic properties of iron–cobalt-based alloys processed by metal injection moulding
- Solid-state synthesis and magnetic properties of rhombohedral phase Mg2SiNi3
- DGM News
- DGM News
