Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions

Kahoul, A.; Hammouche, A.; Naamoune, Farid; Chartier, P.; Poillerat, G.; Koenig, J. F.

doi:10.1016/s0025-5408(00)00395-0

Cited by 35 publications

(26 citation statements)

References 22 publications

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“…Compared to the x = 0.6 and Pt electrodes, the La 0.6 Ca 0.4 CoO 3 one appears to be much more active. The effect of the substitution ratio x on the electrode kinetics was clearly established in a previous study [15]; it was accredited to the evolution of the electrode active surface area (i.e. the electrode/electrolyte interface at which the reaction takes place) with x.…”

Section: Electrocatalytic Activitymentioning

confidence: 81%

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Electrocatalytic activity and stability of La1–xCaxCoO3 perovskite-type oxides in alkaline medium

et al. 2004

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Section: Electrocatalytic Activitymentioning

confidence: 81%

“…Perovskite-type cobalt oxides La 1−x Ca x CoO 3 (x = 0.0, 0.2, 0.4 and 0.6) were synthesized following the so-called amorphous citrate method [15]. Highly pure commercial grade reagents were used.…”

Section: Methodsmentioning

confidence: 99%

Electrocatalytic activity and stability of La1–xCaxCoO3 perovskite-type oxides in alkaline medium

et al. 2004

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“…So BET surface area can be increased with increasing Ca content, and it gives rise to improvement of catalytic performance. But, A. Kahoul et al [9] reported that when they use water as a solvent to synthesize the catalyst precursor, they could not observe the significant variation of surface area in the 0.1≤x≤0.4 range. Furthermore, the heterogeneity in the material could be increased for higher Ca concentration.…”

Section: Cathodic and Anodic Polarization Performancementioning

confidence: 99%

Electrochemical evaluation of La1 − x Ca x CoO3 cathode material for zinc air batteries application

et al. 2008

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We synthesized nano-sized La 1−x Ca x CoO 3 (x= 0.1-0.4) cathode catalysts for zinc air secondary batteries by the citrate method, and measured electrochemical characteristics of the cathodes according to the cathode catalyst's calcium content. We heat treated the prepared precursor at a calcination temperature of 700°C, and examined it by XRD analysis and electrochemical evaluation. We examined the prepared La 1−x Ca x CoO 3 catalyst powder's oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and cycle-stability performance. When we consider ORR, OER and cycle-stability performance simultaneously, La 0.9 Ca 0.1 MnO 3 catalyst showed the best performance because of its lowest voltage deference between charge and discharge, and its lowest degradation according to cycle.

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“…The method has been applied for certain metal oxides such as LiMn 2 O 4 spinel [10], Bi 2 Ru 2 O 7 pyrochlore, and La 1 − x Ca x CoO 3 perovskites [11][12][13]. A clear solution was obtained by heating a mixture of citric acid (50 g) and ethylene glycol (50 ml) (Aldrich) at 90°C for 30 min.…”

Section: Synthesis Of Fepo 4 Compoundmentioning

confidence: 99%

Electrochemical performances of FePO4-positive active mass prepared through a new sol–gel method

Kahoul

Hammouche

2009

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This investigation is a contribution to the research on alternative cathode materials with much more promising performances for lithium batteries. It deals with the electrochemical properties of iron phosphate compound FePO 4 , chemically prepared through the so-called sol-gel Pechini process, terminated by a calcination of the product precursor at temperatures (T c ) ranging between 350°C and 650°C. A crystalline phase was obtained for temperatures ≥400°C. The particle size decreased with the decrease in T c , giving rise to a Brunauer-Emmett-Teller (BET)-specific surface area, S BET , as high as 28 m 2 g −1 for the sample annealed at 400°C. The electrochemical properties of FePO 4 -based composite cathodes were characterized on three-electrode laboratory cells. Charge-discharge cycling determined a maximum reversible capacity of 132 mAh g −1 , which fell with the increase in T c . A direct correlation was established between the activity of the material and its active surface area.

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Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions

Cited by 35 publications

References 22 publications

Electrocatalytic activity and stability of La1–xCaxCoO3 perovskite-type oxides in alkaline medium

Electrocatalytic activity and stability of La1–xCaxCoO3 perovskite-type oxides in alkaline medium

Electrochemical evaluation of La1 − x Ca x CoO3 cathode material for zinc air batteries application

Electrochemical performances of FePO4-positive active mass prepared through a new sol–gel method

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