Evaluation of Sr0.88Y0.08TiO3–CeO2 as composite anode for solid oxide fuel cells running on CH4 fuel

Sun, Xiufu; Wang, Shaorong; Wang, Zhenrong; Qian, Jia; Wen, Tian; Huang, Fuqiang

doi:10.1016/j.jpowsour.2008.10.067

Cited by 48 publications

(38 citation statements)

References 14 publications

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“…Moreover, the STNb2-CeO 2 composite adheres better to the YSZ electrolyte than the STNb2-YSZ composite. Our observation of a tight junction at the STNb2-CeO 2 /YSZ interface corresponds well with the observations of Sun et al [12,13]. They report that the addition of CeO 2 can decrease the mismatch between the anode and electrolyte.…”

Section: Resultssupporting

confidence: 93%

The comparison of SrTi0.98Nb0.02O3–δ-CeO2 and SrTi0.98Nb0.02O3–δ-YSZ composites for use in SOFC anodes

et al. 2012

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Composites of Nb-doped strontium titanate mixed with yttria-stabilized zirconia or cerium oxide in 50:50, 70:30 and 85:15 weight ratios were evaluated as possible anode/electrolyte interface materials for solid oxide fuel cells in terms of chemical compatibility, electrical conductivity and mechanical properties. It has been shown that composite samples prepared by typical powder-mixing methods remain single-phase up to 1400°C. The electrical conductivity of these composites, regardless of their composition and fabrication conditions, is lower than the conductivity of pure SrTi 0.98 Nb 0.02 O 3-δ , but in most cases sufficient for solid oxide fuel cells anode application. The best properties are found for samples reduced at 1400°C for 10 h in H 2 atmosphere. The observations made by scanning electron microscope suggest that the grains of both phases are well-distributed throughout the whole volume of the investigated samples, and that the composites with CeO 2 better adhere to the electrolyte surface. The electrical results confirm that composites with at most 30 wt % of YSZ/CeO 2 phase fulfill the anode requirements. However, the fuel cell performance tests indicate that the application of composite with CeO 2 results in the lower power density than the application of the composite with YSZ.

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Section: Resultssupporting

confidence: 93%

The comparison of SrTi0.98Nb0.02O3–δ-CeO2 and SrTi0.98Nb0.02O3–δ-YSZ composites for use in SOFC anodes

et al. 2012

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“…Although the performance of reversible operation of SYT cells in this work was not sufficient to promise good electrolyzer performance, this effect of remarkable change in ASR could help pinpoint the operation region where improved performance in reverse operation can be achieved. Since the performance of SYT-based anode supported cells manufactured in this work showed relatively low performance compared to some recent studies [2,10], degradation characterization in long-term exposures to oxidizing conditions or repeated redox environment cycling was not performed. Copyright © 2011 by ASME The effects of full cell fabrication conditions on the cell impedance are shown in Figure 7.…”

Section: Figure 4 I-v Polarization Curves Of Syt Anode Supported Celmentioning

confidence: 87%

“…Moreover, nickel and nickel oxide can lead to allergies or cancer during manufacturing and processing, adding difficulties to handling the material [1]. Recently donordoped strontium titanate (SrTiO 3 ) has been considered to be a promising alternative SOFC anode material [1][2][3][4][5][6]. Studies have demonstrated that SrTiO 3 based materials meet the SOFC anode requirement well, such as thermodynamic stability in anodic conditions, electronically and ionically conductive, chemically compatible with typical electrolyte and interconnect materials, and similar thermal expansion coefficient to other cell components [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Fuel Flexible and Reversible Operation of Yttrium-Doped Strontium Titanate Anode Supported SOFC

Brouwer

2011

ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology

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The performance of novel yttrium-doped SrTiO 3 (Sr 0.86 Y 0.08 TiO 3 , SYT) anode materials for an anode supported SOFC have been evaluated in terms of fuel flexibility and reversible operation at intermediate temperature (800°C). The SYT anode supported PEN structures were fabricated using tape casting, dip coating and screen printing for the anode substrate, electrolyte and cathode, respectively. Overall performance of SYT-YSZ composite anode supported cells indicates that this anode material set is not likely to be an outstanding performer, mainly due to the significant anode polarization losses and relatively high ohmic losses. With careful processing of the anode during cell fabrication, major parts of the ohmic losses introduced by the SYT anode can be reduced. The results also indicate that Ni infiltration of the SYT anode can lead to smaller polarization losses, thus achieving better cell performance.

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“…Traditional Ni-yttria stabilized zirconia (Ni/YSZ) anodes have been used in SOFCs for decades. Although nickel is an excellent catalyst for hydrogen oxidation and good electrical current conductor, Ni-based anodes are likely to suffer structural damage when cycled repeatedly in oxidizing and reducing atmospheres [7][8][9][10]. Therefore, research and development of new anode materials have received much attention previously.…”

Section: Introductionmentioning

confidence: 99%

SYNTHESIS OF LAxSR1-xTIO3 ANODE MATERIALS BY SOL-GEL AUTO-COMBUSTION METHOD

Cheng

2012

J. Chil. Chem. Soc.

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A novel anode material for intermediate temperature solid oxide fuel cells with a composite of La x Sr 1-x TiO 3 has been synthesized by a sol-gel auto-combustion method. X-ray diffraction (XRD) shows that La x Sr 1-x TiO 3 has good chemical compatibility with Gd 0.2 Ce 0.8 O 1.9 electrolyte. The thermal expansion coefficient (TEC) of the as-prepared anode material is similar to that of Gd 0.2 Ce 0.8 O 1.9 . The electric conductivity measurements show that the conductivity of La x Sr 1-x TiO 3 increases with the increasing of lanthanum contents and reached a maximal value at x=0.3. At 800 o C, the electrical conductivity of La 0.3 Sr 0.7 TiO 3 is 184S·cm -1 .

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Evaluation of Sr0.88Y0.08TiO3–CeO2 as composite anode for solid oxide fuel cells running on CH4 fuel

Cited by 48 publications

References 14 publications

The comparison of SrTi0.98Nb0.02O3–δ-CeO2 and SrTi0.98Nb0.02O3–δ-YSZ composites for use in SOFC anodes

The comparison of SrTi0.98Nb0.02O3–δ-CeO2 and SrTi0.98Nb0.02O3–δ-YSZ composites for use in SOFC anodes

Fuel Flexible and Reversible Operation of Yttrium-Doped Strontium Titanate Anode Supported SOFC

SYNTHESIS OF LAxSR1-xTIO3 ANODE MATERIALS BY SOL-GEL AUTO-COMBUSTION METHOD

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