Power generation enhancement of solid oxide fuel cell by cathode–electrolyte interface modification in mesoscale assisted by level set-based optimization calculation

Iwai, Hiroshi; Kuroyanagi, Atsushi; Saito, Motohiro; Konno, Akio; Yoshida, Hideo; Yamada, Takayuki; Nishiwaki, Shinji

doi:10.1016/j.jpowsour.2010.12.024

Cited by 49 publications

(37 citation statements)

References 34 publications

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“…For these materials, the TPB sites are located at the interconnection where the proton‐conducting phase, the electron‐conducting phase, and the gas phase meet. Increasing the TPB area is demonstrated to be a key factor to enhance the cathode performance, and this was envisaged as the solution for overcoming the low cell performance for current BZY cells. Compared with the mechanically mixed composite cathodes, tailoring the cathode architecture using the impregnation method could be an effective route to enlarge the TPB length, since cathode particles are normally kept at the nanometric size, thereby increasing the connection area between the two conducting phases.…”

Section: Resultsmentioning

confidence: 99%

Tailoring the Cathode–Electrolyte Interface with Nanoparticles for Boosting the Solid Oxide Fuel Cell Performance of Chemically Stable Proton‐Conducting Electrolytes

Shafi

Da’as

et al. 2018

Small

126

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Solid oxide fuel cells (SOFCs) represent the most efficient devices for producing electrical power from fuels. The limit in their application is due to the high operation temperature of conventional SOFC materials. Progress is made toward lower operating temperatures using alternative oxygen-ion conducting electrolytes, but problems of stability and electronic conductivity still remain. A promising alternative is the use of chemically stable proton-conducting Y-doped BaZrO (BZY) electrolytes, but their practical applications are limited by the BZY's relatively low performance. Herein, it is reported that deposition by impregnation of cathode nanoparticles on BZY backbones provides a powerful strategy to improve the BZY-based SOFC performance below 600 °C, allowing an outstanding power output for this chemically stable electrolyte. Moreover, it is demonstrated that keeping the nanostructure is more important than keeping the desired chemical composition. The proposed scalable processing method can make BZY a competitive electrolyte for SOFC applications.

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Section: Resultsmentioning

confidence: 99%

Tailoring the Cathode–Electrolyte Interface with Nanoparticles for Boosting the Solid Oxide Fuel Cell Performance of Chemically Stable Proton‐Conducting Electrolytes

Shafi

Da’as

et al. 2018

Small

126

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“…β, the transfer coefficient, is assumed to be 0.5. tpb is the exchange current rate per unit TPB length (A/m) and λ tpb the TPB length density in the electrode (m -2 ). Empirical equations can be used for calculating tpb for the anode (18) and in the cathode (19) Using the estimation performed in different papers for λ tpb (12), (20), (21), (22), the value 1.8 × 10 [A 4 ] was chosen. Activation overpotentials are defined as:…”

Section: Constitutive Equationsmentioning

confidence: 99%

Architectured Interfaces and Electrochemical Modelling in an Anode Supported SOFC

Geagea¹,

Ouyang²,

Chi³

et al. 2015

ECS Trans.

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Increasing the performances of SOFC is many-fold: i/ at low currentdensity, through the enhancement of the catalytic properties of theelectrodes, ii/ in the ohmic loss region, through lower resistance, iii/ inthe high current density region, via the optimization of the electrodesmicrostructure. The present work proposes to explore how thecorrugation of electrode/electrolyte interfaces impacts the performancesof SOFCs. Taking ideas from the battery community, this approach wasapplied to the anode/electrolyte interface of a SOFC based on standardcompositions. Patterning of this interface was achieved with differentgeometries at the 10-100 μm mesoscopic scale by cold pressing. Thinelectrolyte layers have been deposited on top of these architectures bydifferent techniques. In parallel, an electrochemical model was carriedout and implemented throughout the interface in finite element method(FEM) with COMSOL Multiphysics. The results showed a 25% increase in the total current density for a certain ellipsoid geometry.

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“…One of the attractive feature of topology optimization is that an innovative configuration can be automatically generated from a blank design domain without designer's intuition. Due to its high degree of design freedom, topology optimization has been applied to various structural optimization problems, e.g., stiffness maximization problems [14,16], eigenfrequency problems [17,18], thermal problems [19,20], and electromagnetic problems [21,22]; furthermore, applications to practical device designs have also been attracted attention in micro actuator design [23], fuel cell design [24,25] and so on.…”

Section: Introductionmentioning

confidence: 99%

Computational design of flow fields for vanadium redox flow batteries via topology optimization

Chen

Yaji

Yamasaki

et al. 2019

Journal of Energy Storage

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Power generation enhancement of solid oxide fuel cell by cathode–electrolyte interface modification in mesoscale assisted by level set-based optimization calculation

Cited by 49 publications

References 34 publications

Tailoring the Cathode–Electrolyte Interface with Nanoparticles for Boosting the Solid Oxide Fuel Cell Performance of Chemically Stable Proton‐Conducting Electrolytes

Tailoring the Cathode–Electrolyte Interface with Nanoparticles for Boosting the Solid Oxide Fuel Cell Performance of Chemically Stable Proton‐Conducting Electrolytes

Architectured Interfaces and Electrochemical Modelling in an Anode Supported SOFC

Computational design of flow fields for vanadium redox flow batteries via topology optimization

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