Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Giza, K.

doi:10.1016/j.intermet.2012.11.014

Cited by 22 publications

(7 citation statements)

References 18 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This phenomenon suggests that the hydrogen evolution reaction proceeds more readily at higher temperatures, which may be due to the greater electrocatalytic activity of hydride‐forming electrodes at higher temperatures. The I 0 of the oxide at high temperature is higher than that of some hydrogen storage alloys …”

Section: Resultsmentioning

confidence: 84%

See 1 more Smart Citation

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

et al. 2018

View full text Add to dashboard Cite

Summary To obtain a novel negative electrode for nickel‐metal hydride rechargeable batteries, perovskite‐type oxide LaGaO3 was synthesized by the sol‐gel method. The electrochemical properties of the oxide were systematically investigated at different temperatures by using galvanostatic, chronoamperometric, and potentiodynamic polarization methods. We have selected 298, 313, and 328 K as room, intermediate, and high temperatures, respectively. The galvanostatic results showed that the discharge capacity of the oxide LaGaO3 increased with the temperature elevating during the first 3 cycles. This oxide has the highest discharge capacity of about 220 mAh g−1at high temperature. For room and intermediate temperatures, we observed that the discharge capacity maintains a constant about of 5 and 13 mAh g−1 for 298 and 313 K, respectively, when the number of cycles is increased. The electrochemical kinetic analysis indicates that the exchange current density and the hydrogen diffusion coefficient of the oxide LaGaO3 increase with the rise in temperature. The apparent activation energy (Ea) for hydrogen diffusion process and the activation energy (ΔrH*) for charge‐transfer reaction of the investigated oxide electrode LaGaO3 are estimated. The calculated values of the Ea and ΔrH* are 117.46 and 105 kJ mol−1, respectively. The above experimental results indicated that the kinetic properties of the working electrode have been significantly improved by the elevating of the temperature. The best electrochemical performance (faster activation and highest maximum capacity) of the oxide electrode is obtained at high temperature (328 K).

show abstract

Section: Resultsmentioning

confidence: 84%

“…The I 0 of the oxide at high temperature is higher than that of some hydrogen storage alloys. [44][45][46][47][48] The activation energy (Δ r H * ) of the charge transfer process occurring on the electrode surface can be estimated by the following formula 41 :…”

Section: Resultsmentioning

confidence: 99%

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In the first one, the current decreases rapidly due to a consumption of hydrogen at the surface, while in the second time region the current decreases slowly in a linear way. In this case, hydrogen is supplied from the bulk alloy proportionally to the concentration gradient of hydrogen and the current is controlled by the diffusion rate of hydrogen atoms [22] with time [23,24].…”

Section: Electrochemical Characterizationsmentioning

confidence: 99%

Electrochemical characterization of mechanically alloyed LaCaMgNi9 compound

Chebab¹,

Abdellaoui²,

Latroche

et al. 2016

Mater Renew Sustain Energy

View full text Add to dashboard Cite

The performance of a nickel-metal hydride (Ni-MH) battery mainly depends on the characteristics of the negative electrode. The electrochemical characteristics of mechanically alloyed compound LaCaMgNi 9 , including the discharge capacity and the hydrogen diffusion coefficient, were studied as function of mechanical alloying (MA) conditions. The electrochemical measurements show that the LaCaMgNi 9 electrode has a maximum discharge capacity of about 150 mAh/g at a discharge rate of C/3. The hydrogen discharge capacity dramatically decreases as MA duration exceeds 20 h.

show abstract

“…The hydrogen diffusion coefficient is another thermodynamic characteristic that is still of interest and has been studied through different techniques-nuclear magnetic resonance, various electrochemical techniques, neutron scattering or a combination of these [19,20]. Therefore in the present study, we concentrated on the complex characterization of hydrogen capacity and kinetics, both from a hydrogen gas phase as well as electrochemically, for the following alloys for comparison: 3 was previously studied by K. Giza [21] and showed a high capacity of 310 mA/g. However, there are no data about the electrochemical behavior that occurs during more than 10 cycles and there are no data for the gas phase hydrogenation.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Gas Phase and Electrochemical Hydriding of LaNi5−xMx (M = Sn, Co, Al) Alloys

et al. 2020

View full text Add to dashboard Cite

Hydriding/dehydriding properties of a series of LaNi5 based alloys were compared by applying both hydrogen gas phase and electrochemical hydrogen charge/discharge methods. The highest hydrogen absorption capacity of 1.4 wt.% H2 was found for LaNi4.3Co0.4Al0.3, although LaNi4.8Sn0.2 also reveals comparable hydrogen capacity (>1.3%). A significant difference in the hydriding kinetics was observed for all studied alloys before and after activation. The activated alloys (5 cycles at 65 °C, 40 atm. H2) reach their maximum capacities after less than a minute, whereas the pure LaNi5 alloy needs several minutes for complete hydriding. The electrochemical hydriding/dehydriding behavior of the alloys reveals superior performance of LaNi4.3Co0.4Al0.3 and LaNi4.8Sn0.2 compared to the other compositions studied, as the capacity of LaNi4.8Sn0.2 decreases by only 10% for 60 charge/discharge cycles at a current density of 100 mA/g. Good agreement between the hydrogen sorption kinetics of the alloys obtained electrochemically and from hydrogen gas phase has also been observed.

show abstract

Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Cited by 22 publications

References 18 publications

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

Electrochemical characterization of mechanically alloyed LaCaMgNi9 compound

Hydrogen Gas Phase and Electrochemical Hydriding of LaNi5−xMx (M = Sn, Co, Al) Alloys

Contact Info

Product

Resources

About

Electrochemical studies of LaNi4.3Co0.4Al0.3 hydrogen storage alloy

Cited by 22 publications

References 18 publications

Effect of temperature on behavior of perovskite-type oxide LaGaO3 used as a novel anode material for Ni-MH secondary batteries

Effect of temperature on behavior of perovskite-type oxide LaGaO3 used as a novel anode material for Ni-MH secondary batteries

Electrochemical characterization of mechanically alloyed LaCaMgNi9 compound

Hydrogen Gas Phase and Electrochemical Hydriding of LaNi5−xMx (M = Sn, Co, Al) Alloys

Contact Info

Product

Resources

About

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries