Production of La0.6Sr0.4Co0.2Fe0.8O3-δ cathode with graded porosity for improving proton-conducting solid oxide fuel cells

Lai, Yi-Wei; Lee, Kan-Rong; Yang, Seng-Yu; Tseng, Chung Jen; Liao, Y.C.; Tsao, I-Yu; Chen, Shouyuan; Lee, Sheng‐Wei

doi:10.1016/j.ceramint.2019.07.270

Cited by 18 publications

(4 citation statements)

References 60 publications

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“…The high reactivity of the (La, Sr)-containing electrodes with the conventional YSZ electrolyte facilitated extensive investigations of the LSM-based cathodes formed on the SDC [148][149][150][151], GDC [152], SSZ [151,153], LSGM [149], BaZr 0.8 Y 0.2 O 3 − δ (BZY20) [154], La 9.5 Si 6 O 26.25 [155], and La 27.44 W 4.56 O 55.68 (LWO56) [156] electrolytes as an alternative. The LSCF-based cathodes were formed on the SSZ [157], SDC [158,159], Ce 0.9 Gd 0.1 O 2 − δ (GDC10) [160][161][162], GDC [126,[163][164][165][166][167] Y 0.1 Ce 0.9 O 1.95 [168], Nd 0.2 Ce 0.8 O 3 − δ [169], SSZ [170], LSGM [171,172], GDC with LSGM [173], SDC with LSGM [174], BZY20 [175], BaZr 0.9 Y 0.1 O 3 − δ [176], BaZr 0.8 Yb 0.2 O 3 − δ (BZYb) [177], BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3 − δ (BCZYYb) [178][179][180][181][182], BaCe 0.7 Zr 0.1 Y 0.2 O 3 − δ (BCZY) [183][184][185], and BaCe 0.7 Zr 0.15 Y 0.15 O 3 − δ (BCZY15) [186] electrolytes.…”

Section: Key Functional Properties Of Lsm and Lscf Electrode Material...mentioning

confidence: 99%

“…[202][203][204] (LSCF), screen printing [205][206][207][208][209] (LSM), Refs. [110,158,183,210,211] (LSCF), tape casting [212][213][214][215] (LSM), Refs. [174,180,216,217] (LSCF), spraying [212,[218][219][220][221] (LSM), Refs.…”

Section: Conventional and Advanced Techniques To Fabricate Electrode ...mentioning

confidence: 99%

“…Figure 5 shows schematics of these deposition methods. deposition in planar cells on the supporting fuel electrode, which are technologically simple and easily scalable, are slurry coating [198][199][200][201] (LSM), [202][203][204] (LSCF), screen printing [205,[206][207][208][209] (LSM), [110,158,183,210,211] (LSCF), tape casting [212][213][214][215] (LSM), [174,180,216,217] (LSCF), spraying [212,[218][219][220][221] (LSM), [170,173,[222][223][224] (LSCF). Figure 5 shows schematics of these deposition methods.…”

Section: Conventional and Advanced Techniques To Fabricate Electrode ...mentioning

confidence: 99%

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Overview of Approaches to Increase the Electrochemical Activity of Conventional Perovskite Air Electrodes

Филонова

Pikalova

2023

Materials

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The progressive research trends in the development of low-cost, commercially competitive solid oxide fuel cells with reduced operating temperatures are closely linked to the search for new functional materials as well as technologies to improve the properties of established materials traditionally used in high-temperature devices. Significant efforts are being made to improve air electrodes, which significantly contribute to the degradation of cell performance due to low oxygen reduction reaction kinetics at reduced temperatures. The present review summarizes the basic information on the methods to improve the electrochemical performance of conventional air electrodes with perovskite structure, such as lanthanum strontium manganite (LSM) and lanthanum strontium cobaltite ferrite (LSCF), to make them suitable for application in second generation electrochemical cells operating at medium and low temperatures. In addition, the information presented in this review may serve as a background for further implementation of developed electrode modification technologies involving novel, recently investigated electrode materials.

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Section: Key Functional Properties Of Lsm and Lscf Electrode Material...mentioning

confidence: 99%

Section: Conventional and Advanced Techniques To Fabricate Electrode ...mentioning

confidence: 99%

Section: Conventional and Advanced Techniques To Fabricate Electrode ...mentioning

confidence: 99%

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Overview of Approaches to Increase the Electrochemical Activity of Conventional Perovskite Air Electrodes

Филонова

Pikalova

2023

Materials

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“…[10] (양극, 공기극) 에 의해 높은 성능을 확보할 수 있었다. [12][13][14] ). [15] 최근에 적층형 페로브스카이트 (AA'B 2 O 5+δ ) 구조인 PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF)가 산소이온 (O 2-), 전자 (e -), 그리고 프로톤 (H + )에 대한 전도 특성을 모 두 갖는 삼중 이온 및 전자 전도체로 보고되었다.…”

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Electrochemical Evaluation of Layered Perovskite YBa0.5Sr0.5Co1.5Fe0.5O5+δ Cathode as a Triple Ionic and Electronic Conductor for Protonic Ceramic Fuel Cells

Cho¹,

Choi²

2021

Ceramist

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Protonic ceramic fuel cells (PCFCs) have receiving huge attention as a promising energy conversion device because of their high conversion efficiency, lack of fuel dilution, and high ionic conductivity at intermediate temperature regime (400 ∼ 600 oC). Although this fuel cell system can effectively solve the main obstacle for the commercialization of conventional solid oxide fuel cells, electrochemical performance is currently limited by the cathodic polarization due to insufficient catalytic activity. To overcome this issue, layered perovskite materials, PrBa0.5Sr0.5Co1.5Fe0.5O5+δ, have been discovered as triple ionic and electronic conductor, which enables to simultaneously conduct H+/O2-/e-. Despite great advantages, there is large gap in the thermal expansion coefficient (TEC) between the cathode and electrolyte. Herein, we developed a new triple conducting cathode material, YBa0.5Sr0.5Co1.5Fe0.5O5+δ (YBSCF) to minimize TEC while maintaining the high electro-catalytic activity with excellent hydration properties. Structural analysis, hydration properties, and electrochemical performances of YBSCF cathode were investigated. In particular, the peak power density of YBSCF cathode based on BaZr0.4Ce0.4Y0.1Yb0.1O3-δ (BZCYYb4411) electrolyte attained 0.702 W cm-2 at 600 oC. Moreover, power output is fairly stable for 300 h without observable degradation by applying a constant voltage of 0.7 V at 600 oC.

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Highly Active and Durable Air Electrodes for Reversible Protonic Ceramic Electrochemical Cells Enabled by an Efficient Bifunctional Catalyst

Niu

Zhou

Zhang

et al. 2022

Advanced Energy Materials

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The commercialization of reversible protonic ceramic electrochemical cells is hindered by the lack of highly active and durable air electrodes exposed to high concentration of steam under operating conditions. Here, findings that dramatically enhance the electrocatalytic activity and stability of a conventional (La0.6Sr0.4)0.95Co0.2Fe0.8O3−δ (LSCF) air electrode by a multiphase catalyst coating composed of a conformal Pr1−xBaxCoO3−δ thin film and exsolved BaCoO3−δ nanoparticles, are reported. At 600 °C, the catalyst coating decreases the polarization resistance of the LSCF air electrode by a factor of 25 (from 1.09 to 0.043 Ω cm2) in air and the degradation rate by two orders of magnitude (from 1.0 × 10−2 to 1.8 × 10−4 Ω cm2 h−1 in humidified air with 30 vol% H2O). Further, a single cell with the catalyst‐coated LSCF air electrode at 600 °C demonstrates a high peak power density of 1.04 W cm−2 in the fuel cell mode and a high current density of 1.82 A cm−2 at 1.3 V in the electrolysis mode. The significantly enhanced performance of the LSCF air electrode is attributed mainly to the high rate of surface oxygen exchange, fast surface proton diffusion, and the rapid H2O and O2 dissociation on the catalysts.

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Production of La0.6Sr0.4Co0.2Fe0.8O3-δ cathode with graded porosity for improving proton-conducting solid oxide fuel cells

Cited by 18 publications

References 60 publications

Overview of Approaches to Increase the Electrochemical Activity of Conventional Perovskite Air Electrodes

Overview of Approaches to Increase the Electrochemical Activity of Conventional Perovskite Air Electrodes

Electrochemical Evaluation of Layered Perovskite YBa0.5Sr0.5Co1.5Fe0.5O5+δ Cathode as a Triple Ionic and Electronic Conductor for Protonic Ceramic Fuel Cells

Highly Active and Durable Air Electrodes for Reversible Protonic Ceramic Electrochemical Cells Enabled by an Efficient Bifunctional Catalyst

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