Air-breathing miniature planar stack using the flexible printed circuit board as a current collector

Kim, S.-H.; Yeon, Hye; Miesse, Craig M.; Jang, Jae Hyuk; Oh, Youngtek; Won, Suk

doi:10.1016/j.ijhydene.2008.09.088

Cited by 76 publications

(20 citation statements)

References 12 publications

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“…Optimal pH in bio-hydrogen production from tempeh and tofu waste processing is approximately 5.5. This condition compatible with other research studies for bio-hydrogen of food waste, where optimal hydrogen production appears to take place at pH of 5.0 -6.0 for food wastes 24,25 . The pH at much higher levels could decrease the yield of bio-hydrogen 23 .…”

Section: Figure 1 Flowsheet Of Bio-hydrogen Production From Tempeh Asupporting

confidence: 89%

Bio-hydrogen production from tempeh and tofu processing wastes via fermentation process using microbial consortium: A mini-review

Rengga¹,

Wati²,

Siregar³

et al. 2017

AIP Conference Proceedings

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Abstract. One of alternative energies that can replace fossil fuels is hydrogen. Hydrogen can be used to generate electricity and to power combustion engines for transportation. Bio-hydrogen produced from tempeh and tofu processing waste can be considered as a renewable energy. Bio-hydrogen produced from tempeh and tofu processing waste is beneficial because the waste of soybean straw and tofu processing waste is plentiful, cheap, renewable and biodegradable. Specification of tempeh and tofu processing waste were soybean straw and sludge of tofu processing. They contain carbohydrates (cellulose, hemicellulose, and lignin) and methane. This paper reviews the optimal condition to produce bio-hydrogen from tempeh and tofu processing waste. The production of bio-hydrogen used microbial consortium which were enriched from cracked cereals and mainly dominated by Clostridium butyricum and Clostridium roseum. The production process of bio-hydrogen from tempeh and tofu processing waste used acid pre-treatment with acid catalyzed hydrolysis to cleave the bond of hemicellulose and cellulose chains contained in biomass. The optimal production of bio-hydrogen has a yield of 6-6.8 mL/g at 35-60 o C, pH 5.5-7 in hydraulic retention time (HRT) less than 16 h. The production used a continuous system in an anaerobic digester. This condition can be used as a reference for the future research.

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Section: Figure 1 Flowsheet Of Bio-hydrogen Production From Tempeh Asupporting

confidence: 89%

Bio-hydrogen production from tempeh and tofu processing wastes via fermentation process using microbial consortium: A mini-review

Rengga¹,

Wati²,

Siregar³

et al. 2017

AIP Conference Proceedings

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“…The Pt loading used in this work (ca. 0.10 mg Pt cm -2 ) is much lower than that employed in catalysts for direct methanol fuel cells that, usually, is between 2 and 4 mg Pt cm -2 [53][54][55][56], although loading as low as 0.4 mg Pt cm -2 have bee reported for optimized catalysts [57,58]. These results demonstrate that the integrated systems maximize the utilization of the catalysts.…”

Section: Discussionmentioning

confidence: 82%

Electrodeposited platinum catalysts over hierarchical carbon monolithic support

Bruno¹,

Franceschini²,

Planes

et al. 2009

J Appl Electrochem

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Mesoporous deposits of platinum catalysts were electrodeposited over monolith carbon with hierarchical porous structure. The liquid crystal used as a template allowed the electrodeposition of the catalyst on the outer region of the carbon with low penetration in the porous structure. The platinum hexagonal mesostructured deposits exhibits an excellent stability enhanced by the roughness of the carbon support. The mass activity for the electrooxidation of methanol of the mesoporous Pt catalyst supported on the hierarchical carbon is similar to that observed on gold and to that reported for commercial Pt nanoparticulated catalysts, even when this catalyst has a smaller Pt load than the commercial one. Also, the poisoning rate of the mesoporous catalyst is lower than that observed for the commercial catalyst. The integrated system of structured materials could be suitable for the fabrication of modified electrodes in small scale applications.

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“…This power is lower than the value calculated from the maximum power density of 56.4 mW cm − 2 in Figure 2b because the modularization was not optimized for the prevention of current leakage or the inhomogeneous distribution of H 2 , and highly dry H 2 (stored in a metal hydride cartridge) was used. 40 Still, a power level usable for the operation of practical electronics gives us further insight into a new type of portable and flexible power sources.…”

Section: Resultsmentioning

confidence: 99%

A rollable ultra-light polymer electrolyte membrane fuel cell

et al. 2017

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We have developed a highly flexible, ultra-light and thin polymer electrolyte membrane fuel cell that can be used as a portable power source for flexible electronics. To achieve such flexibility and ultra-lightness, we fabricated a thin flow-field plate using a thermal imprinting process and combined it with a laser-machined metal current collector. The air-breathing fuel cell, with a thickness of 0.992 mm and a weight of 2.23 g, demonstrated a total power of 508 mW and a performance degradation of o10% after severe bending fatigue (200 repeated bends). This high power per weight (0.228 W g − 1 ) and robust bending durability have never been observed before. The highly flexible architecture enabled the operation of the fuel cell in an S-shape or even in a rolled-up state without any significant performance loss. We have fabricated a cylindrical planar stack of 10 fuel cells and successfully carried out its outdoor operation to demonstrate its practical applications in various fields.

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Air-breathing miniature planar stack using the flexible printed circuit board as a current collector

Cited by 76 publications

References 12 publications

Bio-hydrogen production from tempeh and tofu processing wastes via fermentation process using microbial consortium: A mini-review

Bio-hydrogen production from tempeh and tofu processing wastes via fermentation process using microbial consortium: A mini-review

Electrodeposited platinum catalysts over hierarchical carbon monolithic support

A rollable ultra-light polymer electrolyte membrane fuel cell

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