Solid oxide fuel cell stacks using extruded honeycomb type elements

Wetzko, M.; Belzner, Andreas; Rohr, F. J.; Harbach, F.

doi:10.1016/s0378-7753(99)00289-x

Cited by 43 publications

(27 citation statements)

References 4 publications

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“…For example, small tubular cells have a high durability against thermal shocks [45,59]. In view of this, honeycomb-type cells proposed by TOHO gas [60] and ABB [61] and new stack designs proposed by Honeywell [62] and by Rolls Royce [63] are also of interest. Anode-support can also be categorized as one of the approaches for utilizing smallceramic units.…”

Section: New Design and A Related Techniquementioning

confidence: 99%

Recent Developments in Solid Oxide Fuel Cell Materials

Yokokawa¹,

et al. 2001

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Recent developments in solid oxide fuel cell (SOFC) materials and stacks have been reviewed mainly from the viewpoint of the materials chemistry associated with stack development. Firstly the general features of SOFCs are described to clarify the materials problems which need to be solved and the technology that needs to be developed. The main, characteristic features of conventional SOFC materials are described with the emphasis put on the materials problems associated with the respective materials. Then the materials problems associated with stack development are described for tubular stacks and for planar stacks with oxide interconnect and with metal interconnect. Finally, new materials, design and processing are discussed in relation to new applications of SOFCs. The emphasis is placed on the fact that these are new challenges and therefore a more fundamental strategy for materials and stack development should be constructed on the basis of the materials science and technology developed mainly for conventional materials.

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Section: New Design and A Related Techniquementioning

confidence: 99%

Recent Developments in Solid Oxide Fuel Cell Materials

Yokokawa¹,

et al. 2001

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“…固体酸化物形燃料電池(SOFC)は，動作温度が 500～1000 °C と高温のため，良質な排熱を利用できることから高い総合効率を得ることができるとともに，炭化水素燃料を比較的利用しやすいなど，燃料選択の自由度も高い．さらに，白金などの高価な貴金属触媒も不要であるためにコスト面でも利点を有する．本研究では，高出力密度化，熱機械的耐久性の向上が期待できるハニカム形 SOFC (Ackerman and Young, 1984, Wetzko et al, 1999, Zhong et al, 2009 速度の影響が明らかになった (Fukushima et al, 2013, Kotake et al, 2015) ．本研究では，燃料極支持ハニカムセルのニッケル触媒近傍の水素分圧低下による電気化学的なニッケル再酸化 (Brus et al, 2015)に起因すると考えられる．ニッケル再酸化により，ニッケル触媒微粒子のネットワークにおける良好な電子伝導パスの減少によるオーム損失の増大およびニッケル触媒の活性表面積の減少につながり，電圧低下に寄与すると考えられる (Liu et al, 2007, Laurencin et al, 2009, Brus et al, 2014 …”

Section: 緒言unclassified

Effect of gas flow channel structure on the performance of an anode-supported honeycomb solid oxide fuel cell

Nakajima

Murakami

2018

Transactions of the JSME (In Japanese)

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An anode-supported honeycomb SOFC gives high volumetric power density and improves thermo-mechanical durability at high temperatures. We have so far fabricated and tested a honeycomb cell with a cathode layer of LSM and an electrolyte layer of 8YSZ on a porous anode honeycomb substrate of Ni/8YSZ. The anode-supported honeycomb cell exhibited promising volumetric power densities. In the present study, current-voltage and current-volumetric power density characteristics of the cells having different flow channel arrangements of the anode and cathode are measured under various inlet hydrogen fuel flow rates to show the effect of three-dimensional transport and distribution of the fuel in the porous anode substrate on the cell performance. We measure ohmic resistances of the honeycomb cells by current interruption method, and indicate the impact of nickel catalyst re-oxidation in the anode substrate by the fuel depletion with the flow channel arrangements resulting in high ohmic resistances and deactivation of the nickel catalyst. In low inlet fuel flow rate, smaller number of the anode flow channel is thereby advantageous, while larger number of the anode flow channel is advantageous in high inlet fuel flow rate. We also discuss suitable flow channel arrangements depending on inlet fuel flow rate to choose an appropriate operation mode. Nakajima, Murakami and Kitahara, Transactions of the JSME (in Japanese), Vol.84, No.859 (2018) © 2018 2 Nakajima, Murakami and Kitahara, Transactions of the JSME (in Japanese), Vol.84, No.859 (2018) © 2018 6 Nakajima, Murakami and Kitahara, Transactions of the JSME (in Japanese), Vol.84, No.859 (2018) © 2018 Keywords

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“…These volumetric power densities are promising compared with the other reports on honeycomb SOFCs. 21 Currently, we are evaluating the performance of the honeycomb SOFC under an air-flow condition, and electrical simulation using a pure O 2 or air-flow conditions is in progress in addition to design of air manifold geometry to achieve a homogeneous air distribution in the honeycomb SOFC stack.…”

Section: (2) Equivalent Circuit Simulation For Electrode-supported Homentioning

confidence: 99%

Design and Fabrication of a Novel Electrode‐Supported Honeycomb SOFC

Yamaguchi

Shimizu

Suzuki

et al. 2009

Journal of the American Ceramic Society

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We report the design and fabrication of a novel electrode‐supported honeycomb solid oxide fuel cell (SOFC), that can generate high volumetric power density. Among various cell designs, honeycomb SOFCs are suitable for compact SOFC modules because they have a large surface electrode area per unit volume. We have succeeded in fabricating a cathode‐supported honeycomb SOFC via extrusion of a LaSrMnO3 honeycomb monolith and through the use of a new slurry injection method for the channel surface coating using electrolyte/anode bi‐layers. The fabricated honeycomb SOFCs exhibited high volumetric power densities of approximately 1.2 W/cm3 at 600°C under a wet H2 fuel flow.

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Solid oxide fuel cell stacks using extruded honeycomb type elements

Cited by 43 publications

References 4 publications

Recent Developments in Solid Oxide Fuel Cell Materials

Recent Developments in Solid Oxide Fuel Cell Materials

Effect of gas flow channel structure on the performance of an anode-supported honeycomb solid oxide fuel cell

Design and Fabrication of a Novel Electrode‐Supported Honeycomb SOFC

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