scholarly journals Improved Electrochemical Properties of an Ni-Based YSZ Cermet Anode for the Direct Supply of Methane by Co Alloying with an Impregnation Method

Ceramics ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 114-126
Author(s):  
Nicharee Wongsawatgul ◽  
Soamwadee Chaianansutcharit ◽  
Kazuhiro Yamamoto ◽  
Makoto Nanko ◽  
Kazunori Sato
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Performance Enhancement ◽  
Yttria Stabilized Zirconia ◽  
Cell Performance ◽  
Impregnation Method ◽  
Stabilized Zirconia ◽  
Porous Microstructure ◽  
Zirconia Cermet ◽  
Ysz Electrolyte ◽  
Porous Anode

To avoid the proneness to degradation due to coking in the operation of solid oxide fuel cells (SOFCs) directly running on methane (CH4) fuels, a modified porous anode of the Ni1−XCoX/YSZ (yttria-stabilized zirconia) cermet prepared by an impregnation method is presented. The influence of the Co alloying content on the cermet microstructure, SOFC characteristics, and prolonged cell performance stability has been studied. Co was incorporated into Ni and formed a solid solution of Ni1−XCoX alloy connected with the YSZ as the cermet anode. The porous microstructure of the Ni1−XCoX/YSZ cermet anode formed by sintering exhibited a grain growth with an increase in the Co alloying content. The electrochemical performance of the cells consisting of the Ni1−XCoX/YSZ cermet anode, the YSZ electrolyte, and the LSM (La0.8Sr0.2MnO3) cathode showed an enhancement by the Ni1−XCoX impregnation treatment for the respective supply of H2 and CH4 to the anode. The cell using the Ni0.75Co0.25/YSZ cermet anode (the Ni0.75Co0.25 cell) showed the highest cell performance among the cells tested. In particular, the performance enhancement of this cell was found to be more significant for CH4 than that for H2; a 45% increase in the maximum power density for CH4 and a 17% increase for H2 at 750 °C compared with the performance of the cell using the Ni/YSZ cermet anode. Furthermore, the prolonged cell performance stability with a continuous CH4 supply was found for the Ni0.85Co0.15 and Ni0.75Co0.25 cells at least for 60 h at 750 °C. These enhancement effects were caused by the optimum porous microstructure of the cermet anode with the low anodic polarization resistance.

scholarly journals Direct application of cobaltite-based perovskite cathodes on the yttria-stabilized zirconia electrolyte for intermediate temperature solid oxide fuel cells

2016 ◽  
Vol 4 (45) ◽  
pp. 17678-17685 ◽  
Author(s):  
Kongfa Chen ◽  
Na Li ◽  
Na Ai ◽  
Meng Li ◽  
Yi Cheng ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Direct Application ◽  
Solid Oxide ◽  
Yttria Stabilized Zirconia ◽  
Oxide Fuel ◽  
Stabilized Zirconia ◽  
Zirconia Electrolyte ◽  
Ysz Electrolyte

Cobaltite based perovskites can be directly applied on the YSZ electrolyte via an in situ polarization induced electrode/electrolyte interface.

Effect of the Steam‐Methane Ratio on Reactions Occurring on Ni/Yttria‐Stabilized Zirconia Cermet Anodes Used in Solid‐Oxide Fuel Cells

1999 ◽  
Vol 146 (7) ◽  
pp. 2481-2487 ◽  
Author(s):  
Manabu Ihara ◽  
Chiaki Yokoyama ◽  
Abulet Abudula ◽  
Ryuzaburo Kato ◽  
Hiroshi Komiyama ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Yttria Stabilized Zirconia ◽  
Oxide Fuel ◽  
Stabilized Zirconia ◽  
Steam Methane ◽  
Zirconia Cermet

Optimization of SDC Interlayer for YSZ-Based IT-SOFCs

2014 ◽  
Vol 1082 ◽  
pp. 69-72
Author(s):  
Shou Cheng He ◽  
Han Chen ◽  
Lu Cun Guo
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Screen Printing ◽  
Sintering Temperature ◽  
Solid Oxide ◽  
Yttria Stabilized Zirconia ◽  
Doped Ceria ◽  
Stabilized Zirconia ◽  
Screen Printing Method ◽  
Ysz Electrolyte ◽  
A Current

Inserting a porous samaria-doped ceria (SDC) interlayer between yttria-stabilized zirconia (YSZ) electrolyte and anode is an effective method to enhancing the performance of intermediate-temperature solid oxide fuel cells (IT-SOFCs). In this work, the microstructure and morphology of the SDC interlayer were optimized by varying its thickness and sintering temperature. Results show that the SDC interlayer fabricated by utilizing once screen printing method and then sintered at 1300 °C for 2 h obtains the best electrochemical performance. The resulting polarization resistance and anodic overpotential (at a current density of 0.05 Acm-2) were 0.84 Ωcm2 and 0.07 V at 800 °C in H2, reduced by factors of 4.7 and 5.6, respectively, when compared with the LSCM anode without the SDC interlayer.

Preparation of SDC Interlayer and Influence on Performances of Anode Supported Solid Oxide Fuel Cells

2007 ◽  
Vol 336-338 ◽  
pp. 486-489
Author(s):  
Wei Tao Bao ◽  
Jian Feng Gao ◽  
Guang Yao Meng
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Single Cell ◽  
Peak Power ◽  
Powder Coating ◽  
Solid Oxide ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Coating Method ◽  
Ysz Electrolyte ◽  
Anode Support

A single cell with a two-layer electrolyte consisting of an yttria stabilized zirconia (YSZ, Y2O3 8 mol%) layer and an Sm-doped ceria (SDC, Sm2O3 20mol%) interlayer has been fabricated on porous YSZ-NiO anode support. The layer of YSZ electrolyte was prepared by modified electrostatic powder coating method and the SDC interlayer by screen-printed method on the green YSZ layer. After co-firing at 1400°C for 5 h, the two-layer film with a dense YSZ film of about 15μm and porous SDC film of about 25μm was fabricated. The performances of as-fabricated single cell using La0.8Sr0.2FeO3 as cathode were tested using H2-3% H2O as fuel and air as oxidant at 800°C. Results indicated that the peak power density of a single cell with SDC interlayer reaches 469 mW/cm2 at 800°C, obviously higher than that of without SDC interlayer, which is about 300 mW/cm2 at 800°C.

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