A Single‐Chamber SOFC Stack: Energy Recovery from Engine Exhaust

Nagao, Masahiro; Yano, Mitsuyasu; Okamoto, Katsushi; Tomita, Atsuko; Uchiyama, Y.; Uchiyama, Naoki; Hibino, Takashi

doi:10.1002/fuce.200800017

Cited by 29 publications

(24 citation statements)

References 16 publications

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“…So, they inherently present low efficiency for the overall cell reaction. Nevertheless, SC-SOFC efficiency can be increased when it is operated using the exhaust from a heat engine [25]. The stability of the cell was checked with the time and thermal cycles under different operating conditions.…”

Section: Efficiency and Stability Of The Fuel Cellmentioning

confidence: 99%

Anode‐supported SOFC Operated Under Single‐chamber Conditions at Intermediate Temperatures

Morales

Roa

Capdevila³

et al. 2010

Fuel Cells

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Anode-supported SOFC was fabricated using gadolinia\ud doped ceria (GDC) as the electrolyte (15 lm of thickness),\ud Ni-GDC as the anode and La0.5Sr0.5CoO3 – d-GDC as the\ud cathode. Catalytic activities of the electrodes and electrical\ud properties of the cell were determined, using mixtures of\ud methane + air, under single-chamber conditions. This work\ud assessed with special and wide emphasis the effect of temperature,\ud gas composition and total flow rate on the cell performance.\ud As a result, operational temperature range of the\ud fuel cell was approximately between 700 and 800 °C, which\ud agrees with the results corresponding to the catalytic activities\ud of electrodes. While Ni-GDC anode was enough active\ud towards methane partial oxidation at cell temperatures\ud higher than 700 °C, the LSC-GDC cathode was enough inactive\ud towards partial and total oxidation of methane at cell\ud temperatures lower than 800 °C. Under optimised gas compositions\ud (CH4/O2 ratio (1) and total flow rate\ud ((530 mL min–1), power densities of 145 and 235Peer ReviewedPostprint (published version

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Section: Efficiency and Stability Of The Fuel Cellmentioning

confidence: 99%

Anode‐supported SOFC Operated Under Single‐chamber Conditions at Intermediate Temperatures

Morales

Roa

Capdevila³

et al. 2010

Fuel Cells

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“…be used for methanol fabrication [111]. Energy harvesting applications such as power generation from exhaust gases of heat engines in cars [222] or motorcycles [142,143] are also envisaged, as the low efficiency of SC-SOFCs can be compensated by the generation of electrical power from waste gases. Several examples of possible applications are detailed in the following sections.…”

Section: Applicationsmentioning

confidence: 99%

“…SC-SOFCs have been proposed to generate electrical power from automotive exhaust gases [142,143,222]. The high temperature of the exhaust gases provides sufficient heat for fuel cell operation, while different hydrocarbon fuels and oxygen are available in the exhaust gas stream.…”

Section: Energy Harvesting Applicationsmentioning

confidence: 99%

“…The high temperature of the exhaust gases provides sufficient heat for fuel cell operation, while different hydrocarbon fuels and oxygen are available in the exhaust gas stream. The cell can be simply put inside the exhaust pipe, as demonstrated by the Hibino group [142,143]. A twelve-cell SC-SOFC stack delivered OCVs of 5-8 V and a power output of 1 W in the exhaust gas of a motorcycle.…”

Section: Energy Harvesting Applicationsmentioning

confidence: 99%

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Single-Chamber Solid Oxide Fuel Cell Technology—From Its Origins to Today’s State of the Art

2010

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Abstract:In single-chamber solid oxide fuel cells (SC-SOFCs), both anode and cathode are situated in a common gas chamber and are exposed to a mixture of fuel and oxidant. The working principle is based on the difference in catalytic activity of the electrodes for the respective anodic and cathodic reactions. The resulting difference in oxygen partial pressure between the electrodes leads to the generation of an open circuit voltage. Progress in SC-SOFC technology has enabled the generation of power outputs comparable to those of conventional SOFCs. This paper provides a detailed review of the development of SC-SOFC technology.

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“…However, the low cell efficiency of current SC-SOFCs questions their practical implementation, and energy-harvesting applications where energy is generated from waste gases and efficiency plays a secondary role seem more adequate. Hibino and co-workers installed an SC-SOFC stack in the exhaust system of a motorcycle and a stable power of over 1 W could be generated from the exhaust gases [87]. Thermal cycling and mechanical damage did not significantly degrade the cell performance, indicating the potential of SC-SOFCs for long-term use in harsh environments.…”

Section: Applications Of Sc-sofcs Systemsmentioning

confidence: 99%

Single‐Chamber Fuel Cells

Napporn

Kühn

2012

Fuel Cell Science and Engineering

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IntroductionIncreasing energy demands, environmental and availability issues related to the use of fossil fuels, and technical progress and downsizing of high-performance electronic systems are challenging us to develop clean, efficient, easily accessible, and rechargeable power-generating systems. Fuel cells have emerged as promising candidates for efficiently producing clean energy for various applications. High efficiencies are expected as these systems are not Carnot limited, and the chemical energy of the fuel and oxidant is directly converted into electrical energy. However, the costs of such systems are still high and are largely due to the nature of the materials used (catalysts, electrolytes, bipolar plates, and their accessories). Conventional fuel cells use two sealed, separate compartments for the fuel and the oxidant. The fuel and the oxidant can then be supplied separately to the respective electrodes, permitting controlled reactions at each electrode necessary for high cell performance. Gas management and manifolding, however, add additional costs to the system and become especially challenging when several single cells are to be assembled in stacks, and for miniaturized fuel cell systems. Moreover, the two gas compartments need to be gas-tight and adequate sealing is required that is chemically and thermomechanically compatible with the cell component materials and can withstand operation at elevated temperatures and during heating-cooling cycles. In solid oxide fuel cells (SOFCs), a high-temperature fuel cell system, common sealants are glass and ceramic materials that face long-term stability and durability issues and can crack during operation of the fuel cell.The single-chamber fuel cell (SC-FC) is a sealing-free fuel cell in which both electrodes are situated in a single compartment and a mixture of fuel and oxidant is supplied directly to the cell (Figure 2.1). SC-FCs promise higher thermomechanical strength in addition to a compact and simplified design. However, single-chamber operation requires selective electrode materials that catalyze the fuel reaction only at the anode and the oxidant reduction only at the cathode. The SC-FC concept dates back to fuel cell research for applications in space in the 1960s [1]. During the last 30 years, the performance of SC-FCs has increased considerably, mainly due to the

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A Single‐Chamber SOFC Stack: Energy Recovery from Engine Exhaust

Cited by 29 publications

References 16 publications

Anode‐supported SOFC Operated Under Single‐chamber Conditions at Intermediate Temperatures

Anode‐supported SOFC Operated Under Single‐chamber Conditions at Intermediate Temperatures

Single-Chamber Solid Oxide Fuel Cell Technology—From Its Origins to Today’s State of the Art

Single‐Chamber Fuel Cells

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