Development of SOFC Stack at NGK Spark Plug Co., Ltd.

Nishijima, D.; Ishikawa, Hiroya; Shibata, Masahiro; Uematsu, Hideki; Sumi, H.; Okuyama, Yasuo; Todo, Yusuke; Komatsu, Daisuke; Ishida, S.; Furusaki, Keizo

doi:10.1149/1.3205513

Cited by 8 publications

(5 citation statements)

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“…SOFCs with the LSM–YSZ cathode can be operated at 750 °C and higher. eqs and show the normally accepted ranges of current density and temperature for conventional SOFCs − …”

Section: Power Plant Simulationsmentioning

confidence: 99%

Economically Optimal Sizing and Operation Strategy for Solid Oxide Fuel Cells to Effectively Manage Long-Term Degradation

Naeini

Cotton

Adams

2021

Ind. Eng. Chem. Res.

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In this paper, an economic analysis is conducted on standalone conventional solid oxide fuel cells (SOFCs) to determine their optimal economic operating conditions and to contribute to the commercialization of this technology. To this end, a mathematical model that accounts for dominant degradation phenomena is used to predict the long-term performance of SOFCs. The results of this analysis revealed that although SOFCs carry high capital costs, they are able to generate electricity at a cost similar to that of traditional power generators under optimal operational conditions. Moreover, it is possible to lower the degradation rate of the cells and run SOFCs under these conditions for several years. Sensitivity analysis showed that capital and fuel costs have the highest impacts on the levelized cost of electricity (LCOE) of SOFCs, while CO2 tax has the smallest. The findings of this analysis illustrate that performance and operational economics of an SOFC are dependent on its mode of operation: SOFCs operating in the constant-power-generation mode had the highest LCOE (ranging from 0.131 to 0.409 $/kW h for different life spans), while those with varying current densities, voltages, and power output during operation were able to generate electricity with a very low LCOE (0.12 to 0.357 $/kW h for different life spans).

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“…SOFCs with the LSM–YSZ cathode can be operated at 750 °C and higher. eqs and show the normally accepted ranges of current density and temperature for conventional SOFCs − …”

Section: Power Plant Simulationsmentioning

confidence: 99%

Economically Optimal Sizing and Operation Strategy for Solid Oxide Fuel Cells to Effectively Manage Long-Term Degradation

Naeini

Cotton

Adams

2021

Ind. Eng. Chem. Res.

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“…The cell voltage of the RSDT cell is about 0.02 V lower than that of the NGK cell at 0.75 A/cm 2 , using standard testing conditions at NGK SP. According to previous publications, NGK SP spent most of the 2008 and 2009 optimizing its cathode (23). As a result of optimization of the cathode thickness and morphology the highest published performance for a 10 x 10 cm cathode was 1.6 W/cm 2 .…”

Section: Cell Performancementioning

confidence: 99%

“…According to NGK SP, the Japanese domestic residential micro CHP will become the first mass production application within next 4 years. NGK Spark Plug has developed several cell designs, sensors and systems for SOFC, to get the maximum power efficiency at various load conditions (18). NGK SP design is made of Ni-yttria stabilized zirconia (YSZ) anode, YSZ electrolyte, and La 0.6 Sr 0.4 CoO 3-δ (LSC) cathode.…”

Section: Introductionmentioning

confidence: 99%

Thin Film Low Temperature Solid Oxide Fuel Cell (LTSOFC) by Reactive Spray Deposition Technology (RSDT)

et al. 2011

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The present work describes the effect on the performance of a SOFC when a Gd0.2Ce0.8O1.9 (GDC) layer has been introduced as diffusion barrier layer between the yttria stabilized zirconia (YSZ) electrolyte and the La0.6Sr0.4Co1-xFexO3-δ (LSCF) cathode of an anode supported cell with a Ni-YSZ anode. The dense, thin and fully crystalline GDC films were directly applied by RSDT, without any post-deposition heating or sintering steps. The quality of the film and performance of the cell prepared by Reactive Spray Deposition Technology (RSDT) was compared to a GDC blocking layer deposited by screen printing (SP) and then sintered at 1000 oC. By applying RSDT to deposit the GDC- barrier layer onto the YSZ electrolyte a lower ohmic resistance has been obtained for the RSDT deposited cell vs. the SP cell. The lower resistance can be attributed to the well crystallized, thin and dense GDC layer deposited at 900 oC.

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“…The variation in oxygen vacancy concentration is known to influence electrochemical properties and mechanical properties. However, little is known about the effect on the thermal properties although (8)(9)(10).…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties of Perovskite-Type Oxides La_0.6Sr_0.4Co_1-XFe_xO_3-δ (0 ≤ x ≤ 1.0)

et al. 2016

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Perovskite-type oxides La0.6Sr0.4Co1-xFexO3-δ (LSCF) have been prepared with Co contents of 0 ≤ x ≤ 1.0 by a Pechini method and characterized by X-ray diffraction analysis. Their thermal diffusivities were measured as a function of oxygen partial pressure (PO2) in the temperature range between 873K and 1273K by a Laser Flash Method (LFA). Heat capacities were measured by TG-DSC@at heating rate 10K/min in the range of temperature between R.T and 1273K. The LSCFs thermal diffusivity was found to be a single function of oxygen deficiency, δ, independently of temperature as well as oxygen partial pressure and Co contents in intermediate temperatures range (873 to 1273K).

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Development of SOFC Stack at NGK Spark Plug Co., Ltd.

Cited by 8 publications

References 0 publications

Economically Optimal Sizing and Operation Strategy for Solid Oxide Fuel Cells to Effectively Manage Long-Term Degradation

Economically Optimal Sizing and Operation Strategy for Solid Oxide Fuel Cells to Effectively Manage Long-Term Degradation

Thin Film Low Temperature Solid Oxide Fuel Cell (LTSOFC) by Reactive Spray Deposition Technology (RSDT)

Thermal Properties of Perovskite-Type Oxides La_0.6Sr_0.4Co_1-XFe_xO_3-δ (0 ≤ x ≤ 1.0)

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Development of SOFC Stack at NGK Spark Plug Co., Ltd.

Cited by 8 publications

References 0 publications

Economically Optimal Sizing and Operation Strategy for Solid Oxide Fuel Cells to Effectively Manage Long-Term Degradation

Economically Optimal Sizing and Operation Strategy for Solid Oxide Fuel Cells to Effectively Manage Long-Term Degradation

Thin Film Low Temperature Solid Oxide Fuel Cell (LTSOFC) by Reactive Spray Deposition Technology (RSDT)

Thermal Properties of Perovskite-Type Oxides La0.6Sr0.4Co1-XFexO3-δ (0 ≤ x ≤ 1.0)

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Thermal Properties of Perovskite-Type Oxides La_0.6Sr_0.4Co_1-XFe_xO_3-δ (0 ≤ x ≤ 1.0)