A facile method to fabricate proton-conducting BaZr0·85Y0·15O3- electrolyte with a large grain size and high conductivity

Ge, Lin; Jiao, Jiahui; Zhu, Zongchao; Zhang, Qixi; Zheng, Yifeng; Chen, Han; Guo, Lucun

doi:10.1016/j.ceramint.2019.08.202

Cited by 15 publications

(3 citation statements)

References 40 publications

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“…After being mixed and ball‐milled for 10 h, the BCFZY mixture was heated at 1150 °C for 4 h, and the SCM mixture was heated at 1050 °C for 10 h. The detailed synthesis processes for BZY can be found in a previous study. [ 48 ] BaCe 0.7 Zr 0.1 Y 0.2 O 3 (BCZY) powder was synthesized via a conventional sol–gel combustion method using citric acid as the combustion agent and BaCO 3 , Ce(NO 3 ) 3 ·6H 2 O, Y(NO 3 ) 2 ·6H 2 O, and ZrO(NO 3 ) 2 as raw materials and calcined at 1000 °C for 3 h. The NiO powders used in the study were purchased from Fuel Cell Corporation.…”

Section: Methodsmentioning

confidence: 99%

Superior Durability and Activity of a Benchmark Triple‐Conducting Cathode by Tuning Thermo‐Mechanical Compatibility for Protonic Ceramic Fuel Cells

Yu,

Ge,

et al. 2024

Adv Funct Materials

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As a benchmark triple‐conducting cathode, BaCo0.4Fe0.4Zr0.1Y0.1O3−δ (BCFZY) has been widely investigated for protonic ceramic fuel cells (PCFC) in recent years. However, the reported electrochemical performance of BCFZY cathode differs, which is determined in this work to originate from the thermal expansion mismatch between BCFZY and electrolyte. Accordingly, two strategies for enhanced thermo‐mechanical compatibility are examined: impregnation and thermal expansion offset. In contrast to the impregnation of BCFZY nanoparticles on electrolyte backbones that only helps improve electrochemical performance, negative thermal expansion oxide Sm0.85Cu0.15MnO3−δ (SCM)‐offset BCFZY exhibits superior durability and activity simultaneously. Specifically, the polarization resistance decay rate of the SCM‐offset BCFZY is only ~0.2%/100 h, compared with ~18.75%/100 h for “impregnated BCFZY.” Moreover, pure SCM generates moderate cathodic performance (area‐specific resistance = 0.11 Ω cm2, 700 °C), X‐ray diffraction and transmission electron microscopy reveal an in‐situ formed intergranular Ba2Cu3SmO7−δ phase at the boundaries of BCFZY and SCM. Thus, SCM can serve as a “three‐effect” additive, i) offset thermo‐expansion, ii) strengthen electrode structure and adhesion, and iii) provide acceptable oxygen‐reduction‐reaction activity, being favorable for superior performance. A PCFC using a SCM‐offset BCFZY cathode achieves the highest power density (1455 mW cm−2) yet recorded for PCFCs with BCFZY‐based cathodes.

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Section: Methodsmentioning

confidence: 99%

Superior Durability and Activity of a Benchmark Triple‐Conducting Cathode by Tuning Thermo‐Mechanical Compatibility for Protonic Ceramic Fuel Cells

Yu,

Ge,

et al. 2024

Adv Funct Materials

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“…Since the operating temperature of Yttria stabilized zirconia (YSZ) is above 700 • C [2], affecting the practical application of the battery, it is necessary to search for an electrolyte that can operate at intermediate temperatures (300-600 • C) with sufficiently high ionic conductivity. Extensive research on crystal structures has led to the discovery of various electrolyte materials with different structures such as the fluorite-type [3][4][5], perovskite-type [6][7][8][9][10], melilite-type [11], and apatite-type [12] structures, that exhibit high ionic conductivity at intermediate temperatures.…”

Section: Introductionmentioning

confidence: 99%

Chemical Compatibility and Electrochemical Performance of Ba7Ta3.7Mo1.3O20.15 Electrolytes for Solid Oxide Fuel Cells

Xu,

Zhou,

et al. 2023

Materials

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Hexagonal perovskite-related oxides Ba7Ta3.7Mo1.3O20.15 (BTM) have recently been reported as promising electrolyte materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). In this work, sintering properties, thermal expansion coefficient, and chemical stability of BTM were studied. In particular, the chemical compatibilities of (La0.75Sr0.25)0.95MnO3±δ (LSM), La0.6Sr0.4CoO3 (LSC), La0.6Sr0.4Co0.2Fe0.8O3+δ (LSCF), PrBaMn2O5+δ (PBM), Sr2Fe1.5Mo0.5O6-δ (SFM), BaCo0.4Fe0.4Zr0.1Y0.1O3-δ (BCFZY), and NiO electrode materials with the BTM electrolyte were evaluated. The results show that BTM is highly reactive with these electrodes, in particular, BTM tends to react with Ni, Co, Fe, Mn, Pr, Sr, and La elements in the electrodes to form resistive phases, thus deteriorating the electrochemical properties, which has not been reported before.

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“…Adding a doping agent affects the grain size and ionic conductivity of electrolyte materials. By adding barium doping to 8YSZ, the grain size of the electrolyte, as well as the ionic conductivity value, was increased [12].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the effect of ionic conductivity of electrolyte materials on the solid oxide fuel cell performance

Sasongko

Perdana

Wijayanti

2021

EEJET

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SOFC solid electrolytes are known for their ionic conductivity characteristics, which increase with increasing SOFC operating temperature. Using COMSOL Multiphysics numerical simulation, analysis of SOFC power performance with yttria-stabilized zirconia (YSZ) and lithium sodium carbonate – gadolinium-doped ceria ({LiNa}2CO3-GDC) electrolytes was conducted to determine the potential of these electrolytes in their application in SOFC. The ionic conductivity of YSZ was differentiated based on the mole value of the yttria content, namely 8, 8.95, 10 and 11.54 mol. Meanwhile, GDC varied based on the (LiNa)2CO3 content such as 7.8, 10, 16.8 and 30 %. With the numerical model, the calculation error is an average of 7.32 % and 6.89 % for the experimental power and voltage values. In SOFC with the YSZ electrolyte, it was found that the power output can increase 26.4–35 times with an increase in operating temperature from 500 °C to 750 °C. SOFC with 8YSZ can produce the highest power compared to other YSZ, which is 123 A/m2 at a current of 198 A/m2 with an operating temperature of 500 °C and 3,440 A/m2 at a current of 5,549 A/m2 with an operating temperature of 750 °C. Whereas in SOFC with the GDC electrolyte, it was found that the power output can increase 18.6–22.6 times with an increase in operating temperature from 500 °C to 750 °C. SOFC with 30 % (LiNa)2CO3-GDC produced the highest power compared to other GDC, which is 231 A/m2 at a current of 444 A/m2 with an operating temperature of 500 °C and 5,240 A/m2 at a current of 10,077 A/m2 with an operating temperature of 750 °C. YSZ also showed the potential for an increase in power output as the SOFC temperature increases above 750 °C, while the 30 % variation (LiNa)2CO3-GDC shows a limited increase in ionic conductivity at 750 °C

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A facile method to fabricate proton-conducting BaZr0·85Y0·15O3- electrolyte with a large grain size and high conductivity

Cited by 15 publications

References 40 publications

Superior Durability and Activity of a Benchmark Triple‐Conducting Cathode by Tuning Thermo‐Mechanical Compatibility for Protonic Ceramic Fuel Cells

Superior Durability and Activity of a Benchmark Triple‐Conducting Cathode by Tuning Thermo‐Mechanical Compatibility for Protonic Ceramic Fuel Cells

Chemical Compatibility and Electrochemical Performance of Ba7Ta3.7Mo1.3O20.15 Electrolytes for Solid Oxide Fuel Cells

Analysis of the effect of ionic conductivity of electrolyte materials on the solid oxide fuel cell performance

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