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Takeyuki Moriuchi,Keisuke Morishima,Yuji Furukawa 한국정밀공학회 2008 International Journal of Precision Engineering and Vol.9 No.2
As a biofuel source, direct photosynthetic/metabolic biofuel cells (DPBFC) use cyanobacteria whose photosynthesis and metabolization reactions can convert light energy to electricity. In our previous work, we fabricated a prototype micro-DPBFC that could generate a peak current density of 36 ㎂/㎠ and a maximum power density of 270 ㎻/㎠. In this study, we improve on the previous results by using carbon micro electromechanical systems (C-MEMS), formed from the pyrolysis of patterned photoresist, to fabricate carbon electrodes of an arbitrary shape and controlled porosity to increase the surface area. With these new C-MEMS electrodes, the maximum power density of the micro-DPBFC was 516 ㎻/㎠, a performance twice as good as the results of our previous work.
Moriuchi, Takeyuki,Morishima, Keisuke,Furukawa, Yuji Korean Society for Precision Engineering 2008 International Journal of Precision Engineering and Vol.9 No.2
As a biofuel source, direct photosynthetic/metabolic biofuel cells (DPBFC) use cyanobacteria whose photosynthesis and metabolization reactions can convert light energy to electricity, In our previous work, we fabricated a prototype micro-DPBFC that could generate a peak current density of $36{\mu}A/cm^{2}$ and a maximum power density of $270nW/cm^{2}$. In this study, we improve on the previous results by using carbon micro electromechanical systems (C-MEMS), formed from the pyrolysis of patterned photoresist, to fabricate carbon electrodes of an arbitrary shape and controlled porosity to increase the surface area. With these new C-MEMS electrodes, the maximum power density of the micro-DPBFC was $516nW/cm^{2}$, a performance twice as good as the results of our previous work.
Development of a Flexible Direct Photosynthetic/Metabolic Biofuel Cell for Mobile Use
Takeyuki Moriuchi,Shiro Sumida,Akihiro Furuya,Keisuke Morishima,Yuji Furukawa 한국정밀공학회 2009 International Journal of Precision Engineering and Vol.10 No.1
We have developed a direct photosynthetic/metabolic biofuel cell (DPBFC) without a mediator, based on the extraction of electrons directly from bacteria using a polyaniline electrode. Since previous developments of this nature are rigid, they are not suitable/or use on curved or soft surfaces. Our DPBFC has a flexible structure due to its flexible components: a membrane electrode assembly made of Nafion 117, a carbon cloth electrode made of modified polyaniline, a copper foil current collector, an anode chamber made from molded polydimethylsiloxane (PDMS), and a cathode chamber and cover cut from a PDMS membrane. Silicone bonds were used/or assembling the individual parts. Our 50×50×3-㎜ flexible DPBFC has a stable electrical power output up to a bending angle of 170°. The maximum power density using purple photosynthetic bacteria (Rhodopesudomonas palustris) as a fuel source was 5.26㎼/㎝2 with an open-circuit voltage of 0.089 V.