Bendable polymer electrolyte fuel cell using highly flexible Ag nanowire percolation network current collectors

Chang, Ikwhang; Park, Taehyun; Lee, Sung Yong; Lee, Min Hwan; Ko, Seung Hwan; Won, Suk

doi:10.1039/c3ta11699a

Cited by 97 publications

(69 citation statements)

References 35 publications

(46 reference statements)

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“…This result indicates that the other components operate without any problems. To the best of our knowledge, only one repeated bending test of flexible fuel cells has been reported in previous literature, 22 where the performance of that fuel cell decreased continuously with bending for 4120 times. Consequently, the as-fabricated RUFCs in this study are structurally robust and thus can endure the external force generated when used as flexible electronics, especially when compared to previous flexible fuel cells.…”

Section: Resultsmentioning

confidence: 99%

“…Such phenomena can be found in other studies. 22,23 The lower R ct of the active RUFC accounts for the better air supply by forced convection in the active RUFC than the natural convection of air in the air-breathing RUFC. 34,35 In addition, the lower RH in the air-breathing RUFC by directly exposing the GDL to ambient air could be another cause of the higher R ohm and R ct values.…”

Section: Resultsmentioning

confidence: 99%

“…A bending-induced mechanical strain has been Rollable ultra-light PEMFC T Park et al reported to damage and degrade the MEA. 22,29 Considering that the strain is proportional to the overall thickness, the bending durability of the RUFCs arises from their extremely thin design and strong metal grid current collectors with low flexural rigidity. Because the thicknesses of the flexible fuel cells in previous studies were 12 mm, more strain would be generated, and the bending durability was thus not of high quality.…”

Section: Resultsmentioning

confidence: 99%

“…[17][18][19][20][21] Subsequent research has attempted to resolve such problems by using low-cost, facile processing techniques, including soft lithography employing commercially available polymers and electrically conductive materials. [22][23][24][25][26][27][28][29] Although these reported materials have shown potential as portable power sources, the technology in such reports was not sufficient to be adopted in current and future flexible electronics due to thick and heavy device construction, low power output, stacking issues or high catalyst loading. In particular, bending-induced mechanical strain, which increases linearly with thickness, can damage the membraneelectrode assembly (MEA) and reduce the long-term durability of fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, bending-induced mechanical strain, which increases linearly with thickness, can damage the membraneelectrode assembly (MEA) and reduce the long-term durability of fuel cells. 22,29 Therefore, flexible fuel cells should have a geometry sufficiently thin to both avoid strain damage and maintain high structural degrees of freedom.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A rollable ultra-light polymer electrolyte membrane fuel cell

et al. 2017

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3D Networks of Silver Nanorod–Nanoparticle Hybrids via Aerosol Jetting Printing for Flexible Electrode

Zhao

Lin

et al. 2022

Adv Eng Mater

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To satisfy the functional requirements for next‐generation electronic and optoelectronic devices, diverse protocols have thus been developed for preparing transparent flexible electrodes (TFEs) of metallic nanowires with high flexibility and conductivity, while flexible electrodes with 3D configuration have become a burgeoning frontier. Herein, an innovative 3D network of silver nanorod–nanoparticle hybrids (Ag NNH) is realized by a facile aerosol jet printing (AJP) technique. A dynamic assembly mechanism based on the AJP of silver nanowires (AgNWs) ink is proposed, suggesting a favorable evaporation‐induced migration and assembly process along with the coalescence of deposited droplets. The initially formed Ag NNH random network optimizes the wettability, spreading, and pinning of the droplets, shaping the consecutive deposition behavior of the aerosol droplets for constructing the 3D Ag NNH networks. Planar micro‐supercapacitor (MSC) devices are developed using the Ag NNH network as flexible microelectrode, and a competitive areal capacitance performance has been demonstrated in comparison with other Ag‐based devices. It is envisioned that the as‐developed approach will provide an optional approach for developing future electronic and optoelectronic devices with fascinating hierarchical features.

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Three‐Dimensional Compressible and Stretchable Conductive Composites

et al. 2013

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Three-dimensional (3D) conductive composites with remarkable flexibility, compressibility, and stretchability are fabricated by solution deposition of thin metal coatings on chemically modified, macroscopically continuous, 3D polyurethane sponges, followed by infiltration of the metallic sponges with polydimethylsiloxane (PDMS). These low-cost conductive composites are used as high-performance interconnects for flexible and stretchable light-emitting diode (LED) arrays, even with severe surface abrasion or cutting.

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Bendable polymer electrolyte fuel cell using highly flexible Ag nanowire percolation network current collectors

Cited by 97 publications

References 35 publications

A rollable ultra-light polymer electrolyte membrane fuel cell

A rollable ultra-light polymer electrolyte membrane fuel cell

3D Networks of Silver Nanorod–Nanoparticle Hybrids via Aerosol Jetting Printing for Flexible Electrode

Three‐Dimensional Compressible and Stretchable Conductive Composites

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