Electrochemical properties of LaNi4.2Co0.4Zn0.1Al0.3 and LaNi4.3Co0.4Zn0.1Al0.2 alloys as anode materials for Ni-MH batteries
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Krystyna Giza
Abstract
The galvanostatic charge and discharge technique was used for the evaluation of the changes in electrochemical parameters of the tested metal hydride electrodes during the repeated hydrogen absorption and desorption processes. Higher development of the effective surface area during hydrogenation has been obtained for LaNi4.3Co0.4Zn0.1Al0.2 composite electrode. For the conditions of current ± 0.5 C, the discharge capacities of LaNi4.2Co0.4Zn0.1Al0.3 and LaNi4.3Co0.4Zn0.1Al0.2 alloys are 240 and 316 mAh × g−1, respectively. From the point of view of improving the kinetics of the process of charge transfer at the electrode/electrolyte interface as well as a resistance to self-discharging, a partial substitution of nickel with zinc in the LaNi4.3Co0.4Al0.3 alloy is not favorable.
Kurzfassung
In der diesem Beitrag zugrunde liegenden Studie wurde die galvanostatische Be- und Entladungstechnik angewandt, um die Veränderungen der elektrochemischen Parameter der geprüften Metallhydridelektroden während des wiederholten Wasserstoffabsorptions- und -desorptionsprozesses zu evaluieren. Eine höhere Entwicklung der effektiven Oberfläche während der Wasserstoffbeladung stellte sich für die LaNi4.3Co0.4Zn0.1Al0.2 Kompositelektrode heraus. Für die Bedingungen der Ladung von ± 0.5 C lagen die Entladungskapazitäten der LaNi4.2Co0.4Zn0.1Al0.3 und der LaNi4.3Co0.4Zn0.1Al0.2 Legierung bei 240 und entsprechend bei 316 mAh × g−1. Unter dem Aspekt der Verbesserung der Kinetik des Prozesses des Ladungstransfers an der Elektroden/Elektrolyt-Oberfläche sowie eines Widerstandes gegen Selbstentladung ist der partielle Ersatz von Nickel durch Zink in der LaNi4.3Co0.4Al0.3 Legierung nicht zu empfehlen.
References
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© 2017, Carl Hanser Verlag, München
Artikel in diesem Heft
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- The principles of measurement and testing to characterize material properties
- Electrochemical behavior of alloy AgCu50 during oxidation in the presence of chlorides and benzotriazole
- Mechanical property effects of symmetrical hour glass shapes formed during double-sided TIG keyhole arc welding of AISI1040 joints
- Residual stress state in pipe cut ring specimens for fracture toughness testing
- Effect of overlap length and scarf angle on the mechanical properties of different adhesive joints subjected to tensile loads
- Effect of post-weld heat treatment on fusion boundary microstructure in dissimilar metal welds for subsea service
- Effects of abaca fiber reinforcement on the dynamic mechanical behavior of vinyl ester composites
- Experimental and theoretical study of the rubbing process of epoxy composites against steel
- Structural self-organization of titanium alloys under impulse force action
- Effect of SiC particle size on the mechanical properties of closed aluminum foams
- Comparison of different bushing applications in composite structures of the aerospace industry
- Performance monitoring of superlarge-diameter rock-socketed piles by optic fiber sensors
- Free vibration of a Timoshenko beam carrying three dimensional tip mass: Analytical solution and experimental modal testing
- Electrochemical properties of LaNi4.2Co0.4Zn0.1Al0.3 and LaNi4.3Co0.4Zn0.1Al0.2 alloys as anode materials for Ni-MH batteries
- Production of hard hydrophilic Ni-B coatings on hydrophobic Ni-Ti and Ti-6Al-4V alloys by electroless deposition
Artikel in diesem Heft
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- The principles of measurement and testing to characterize material properties
- Electrochemical behavior of alloy AgCu50 during oxidation in the presence of chlorides and benzotriazole
- Mechanical property effects of symmetrical hour glass shapes formed during double-sided TIG keyhole arc welding of AISI1040 joints
- Residual stress state in pipe cut ring specimens for fracture toughness testing
- Effect of overlap length and scarf angle on the mechanical properties of different adhesive joints subjected to tensile loads
- Effect of post-weld heat treatment on fusion boundary microstructure in dissimilar metal welds for subsea service
- Effects of abaca fiber reinforcement on the dynamic mechanical behavior of vinyl ester composites
- Experimental and theoretical study of the rubbing process of epoxy composites against steel
- Structural self-organization of titanium alloys under impulse force action
- Effect of SiC particle size on the mechanical properties of closed aluminum foams
- Comparison of different bushing applications in composite structures of the aerospace industry
- Performance monitoring of superlarge-diameter rock-socketed piles by optic fiber sensors
- Free vibration of a Timoshenko beam carrying three dimensional tip mass: Analytical solution and experimental modal testing
- Electrochemical properties of LaNi4.2Co0.4Zn0.1Al0.3 and LaNi4.3Co0.4Zn0.1Al0.2 alloys as anode materials for Ni-MH batteries
- Production of hard hydrophilic Ni-B coatings on hydrophobic Ni-Ti and Ti-6Al-4V alloys by electroless deposition
