2017
DOI: 10.4236/msa.2017.811054
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Collagen-Based Fuel Cell and Its Proton Transfer

Abstract: We have fabricated the fuel cell based on the tissue derived biomaterial "collagen" and investigated its proton transfer. It was found that "collagen" becomes the electrolyte of fuel cell in the humidified condition. The power density of the fuel cell becomes typically 8.6 W/m 2 in the 80% humidity. Further, these results indicate that collagen exhibits proton conductivity in the humidified condition. Both of proton conductivity and dielectric constant increase by the increase of humidity. From the analyses of… Show more

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Cited by 18 publications
(21 citation statements)
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“…This value is consistent with the value of~1.0 × 10 −5 S/cm of the proton conductivity obtained from other measurements in the high humidified condition [29]. The proton conductivity of the solid collagen electrolyte is caused by the proton (or H 3 O + ) migration via the water bridges formed between OH, CO, and NH groups in the side chain of the collagen peptide [29]. Due to the simple mechanism of a water bridge without the doping of active group such as SO 3 H, the proton conductivity (~1 × 10 −5 S/cm) in the collagen film is lower compared with the other proton conductors such as Nafion (~1 × 10 −1 S/cm) including SO 3 H [54] and the hydrogel (~1 × 10 −3 S/cm) based on PVA and buffer solutions [55].…”
Section: Bioelectrolyte "Collagen"supporting
confidence: 93%
“…This value is consistent with the value of~1.0 × 10 −5 S/cm of the proton conductivity obtained from other measurements in the high humidified condition [29]. The proton conductivity of the solid collagen electrolyte is caused by the proton (or H 3 O + ) migration via the water bridges formed between OH, CO, and NH groups in the side chain of the collagen peptide [29]. Due to the simple mechanism of a water bridge without the doping of active group such as SO 3 H, the proton conductivity (~1 × 10 −5 S/cm) in the collagen film is lower compared with the other proton conductors such as Nafion (~1 × 10 −1 S/cm) including SO 3 H [54] and the hydrogel (~1 × 10 −3 S/cm) based on PVA and buffer solutions [55].…”
Section: Bioelectrolyte "Collagen"supporting
confidence: 93%
“…Filmy collagen samples that originated from a tilapia’s scale were purchased from Nitta Gelatin Inc. (Osaka, Japan). The sample was obtained by a decalcification together with conventional purification processes of pickling and neutralization [ 3 ]. As shown in Figure 1 b, the translucent sample remains a scale’s pattern.…”
Section: Samples and Experimental Methodsmentioning
confidence: 99%
“…Among them, a collagen contained in skins, bones, and scales is desired to be reused in light of effective utilization of food wastes. Collagen films with sufficient toughness are found to have a functionality of fuel-cell electrolyte as well as in Nafion [3]. Once the Nafion film is dehydrated, the performance is hugely reduced owing to a structural damage.…”
Section: Introductionmentioning
confidence: 99%
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“…However, there is no research on using ion channels in the energy field. Recently, we have focused on biomaterials as a substitute material for conventional electrolytes and have exhibited that DNA, collagen, chitin, and chitosan, which are tissue-derived biomaterials, show proton conductivity and could become the electrolyte of fuel cells [ 24 , 25 , 26 , 27 , 28 , 29 ]. However, the value of proton conductivity in these materials is not high; therefore, the investigation of biomaterials with higher proton conductivity is desired.…”
Section: Introductionmentioning
confidence: 99%