Performance of Solid Alkaline Fuel Cells Employing Layered Perovskite-Type Oxides as Electrolyte

Watanabe, Hiroshi; Takahashi, Hiroki; Takeguchi, Tatsuya; Yamanaka, Toshiro; Ueda, Wataru

doi:10.1149/1.3484672

Cited by 8 publications

(7 citation statements)

References 6 publications

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“…In our previous study, we reported that the five kinds of layered perovskite oxides (LaSr 3 Fe 3 O 10 , NaLaTiO 4 , Sr 4 Co 1.6 Ti 1.4 O 8 (OH) 2 •xH 2 O, RbLaNb 2 O 7 and LaFeO 3 ) showed electrochemical performance as electrolyte for alkaline fuel cell without cathode catalyst (6). The results conformed to characteristic property of AFC.…”

Section: Introductionsupporting

confidence: 54%

Solid Alkaline Fuel Cell Composed of Layered Perovskite-Type Oxide LaSr₃Fe₃O₁₀

Takahashi¹,

Watanabe²,

Takeguchi³

et al. 2011

ECS Trans.

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In the present study, solid alkaline fuel cell composed of layered perovskite-type oxide LaSr3Fe3O10 was studied. LaSr3Fe3O10 showed OH- conduction and activity for oxygen reduction reaction. We prepared LaSr3Fe3O10 with various bulk density by sintering at 900, 1100, 1200, 1400, and 1600ºC. When the bulk density increased from 4.03 (sintered at 900ºC) to 4.16 g cm-3 (sintered at 1100ºC), the output power and open circuit voltage increased greatly. However, when the bulk was higher than 4.16 g cm-3, output power decreased with an increase in bulk density.

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Section: Introductionsupporting

confidence: 54%

Solid Alkaline Fuel Cell Composed of Layered Perovskite-Type Oxide LaSr₃Fe₃O₁₀

Takahashi¹,

Watanabe²,

Takeguchi³

et al. 2011

ECS Trans.

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“…LaSr 3 Fe 3 O 10–2 x (OH) 2 x ·H 2 O functions as an electrolyte for OH – conduction . It has recently been reported that an inorganic oxide containing OH – functioned as an anion conductor. − RP-LaSr 3 Fe 3 O 10 without intercalation of water with high electrical conductivity functions as a catalyst for oxygen reduction reaction, − since the fuel cell showed completely theoretical voltage.…”

Section: Resultsmentioning

confidence: 99%

Layered Perovskite Oxide: A Reversible Air Electrode for Oxygen Evolution/Reduction in Rechargeable Metal-Air Batteries

et al. 2013

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For the development of a rechargeable metal-air battery, which is expected to become one of the most widely used batteries in the future, slow kinetics of discharging and charging reactions at the air electrode, i.e., oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), respectively, are the most critical problems. Here we report that Ruddlesden-Popper-type layered perovskite, RP-LaSr3Fe3O10 (n = 3), functions as a reversible air electrode catalyst for both ORR and OER at an equilibrium potential of 1.23 V with almost no overpotentials. The function of RP-LaSr3Fe3O10 as an ORR catalyst was confirmed by using an alkaline fuel cell composed of Pd/LaSr3Fe3O10-2x(OH)2x·H2O/RP-LaSr3Fe3O10 as an open circuit voltage (OCV) of 1.23 V was obtained. RP-LaSr3Fe3O10 also catalyzed OER at an equilibrium potential of 1.23 V with almost no overpotentials. Reversible ORR and OER are achieved because of the easily removable oxygen present in RP-LaSr3Fe3O10. Thus, RP-LaSr3Fe3O10 minimizes efficiency losses caused by reactions during charging and discharging at the air electrode and can be considered to be the ORR/OER electrocatalyst for rechargeable metal-air batteries.

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“…Emerging as another promising alternative in layered perovskites, the Ruddlesden–Popper (RP)-type perovskite (A n +1 B n O 3 n +1 ), especially when n = 3 (e.g., La 4 Ni 3 O 10 , Sr 3 NdFe 3 O 10 , and Sr 4 Co 1.6 Ti 1.4 FeO 8 (OH) 2 · x H 2 O), has received increasing attention in the fields of oxygen permeation and solid oxide fuel cell owing to its large oxygen nonstoichiometry without undergoing phase transition. As a typical RP-type perovskite, the Sr 4 Fe 3 O 10 ( n = 3) consisting of three layers of SrO–FeO 2 –SrO coupled with a rock salt layer of SrO along the c axis is an attractive candidate because of its structural stability, high conductivity, and tunable doping property. − Moreover, a partial substitution of La for Sr at the A-site (i.e., LaSr 3 Fe 3 O 10 ) could further stabilize the intergrowth structure and simultaneously adopt substantial oxygen vacancy without forming a secondary phase and degrading the structural stability .…”

Section: Introductionmentioning

confidence: 99%

A High-Performance Ruddlesden–Popper Perovskite for Bifunctional Oxygen Electrocatalysis

et al. 2020

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Highly active and stable bifunctional materials for the oxygen evolution/reduction reaction (OER/ORR) are critical for developing high-performance metal−air batteries and fuel cells. This study demonstrates the significantly enhanced electrocatalytic activity of a Ruddlesden− Popper (RP) perovskite (A n+1 B n O 3n+1 , n = 3) as a bifunctional material [i.e., RP-LaSr 3 (Co 0.5 Fe 0.5 ) 3 O 10−δ ] for oxygen electrocatalysis via an optimal doping strategy. The improved performance mainly benefits from the enhanced oxygen vacancies, the facile oxygen release and incorporation abilities, the synergistic interplay of Co and Fe together with the increased amounts of adsorbed OH − /O 2 , and the highly oxidative O 2 2− /O − . The more positive onset potential (E onset ) and the highest half wave potential (E 1/2 ) of RP-LaSr 3 (Co 0.5 Fe 0.5 ) 3 O 10−δ imply a better ORR activity relative to those of the benchmark Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 2.59 (BSCF) and the widely referred cubic perovskite (La 0.6 Sr 0.4 ) 0.95 Co 0.2 Fe 0.8 O 3−δ (CP-LSCF). Furthermore, this material enables the electrochemical reduction of O 2 by 4e − to OH − with an impressive stability. More importantly, RP-LaSr 3 Co 1.5 Fe 1.5 O 10−δ shows a largely narrowed potential gap (ΔE) and achieves its minimum value of 0.91 V, remarkably smaller than those of CP-LSCF (1.01 V), BSCF (1.04 V), and most of the state-of-the-art bifunctional materials. This study paves an attractive way to accurately fabricate RP-type perovskites as highly efficient and stable materials for bifunctional oxygen electrocatalysis.

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Performance of Solid Alkaline Fuel Cells Employing Layered Perovskite-Type Oxides as Electrolyte

Abstract: This hypothesis suggests that the possibility of a new alkaline fuel cell by using layered perovskite as electrolyte.

Cited by 8 publications

References 6 publications

Solid Alkaline Fuel Cell Composed of Layered Perovskite-Type Oxide LaSr₃Fe₃O₁₀

Solid Alkaline Fuel Cell Composed of Layered Perovskite-Type Oxide LaSr₃Fe₃O₁₀

Layered Perovskite Oxide: A Reversible Air Electrode for Oxygen Evolution/Reduction in Rechargeable Metal-Air Batteries

A High-Performance Ruddlesden–Popper Perovskite for Bifunctional Oxygen Electrocatalysis

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Performance of Solid Alkaline Fuel Cells Employing Layered Perovskite-Type Oxides as Electrolyte

Abstract: This hypothesis suggests that the possibility of a new alkaline fuel cell by using layered perovskite as electrolyte.

Cited by 8 publications

References 6 publications

Solid Alkaline Fuel Cell Composed of Layered Perovskite-Type Oxide LaSr3Fe3O10

Solid Alkaline Fuel Cell Composed of Layered Perovskite-Type Oxide LaSr3Fe3O10

Layered Perovskite Oxide: A Reversible Air Electrode for Oxygen Evolution/Reduction in Rechargeable Metal-Air Batteries

A High-Performance Ruddlesden–Popper Perovskite for Bifunctional Oxygen Electrocatalysis

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Solid Alkaline Fuel Cell Composed of Layered Perovskite-Type Oxide LaSr₃Fe₃O₁₀

Solid Alkaline Fuel Cell Composed of Layered Perovskite-Type Oxide LaSr₃Fe₃O₁₀