Towards flexible fuel cells: development, challenge and prospect

Yang, Yang; Zhu, Xun; Wang, Qiusen; Ye, Dingding; Chen, Rong; Liao, Qiang

doi:10.1016/j.applthermaleng.2021.117937

Cited by 20 publications

(7 citation statements)

References 51 publications

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“…To date, research has focused on supercapacitors and Li-ion batteries, which will not be covered in this review; readers may refer to relevant review articles. − Most recently, flexible fuel cells have received increased attention thanks to their high energy density and fast recharging times compared to Li-ion batteries. Several types of flexible fuel cells have been reported, including biofuel, proton-exchange membrane, and photocatalytic fuel cells …”

Section: Bioinspired Devicesmentioning

confidence: 99%

“…Several types of flexible fuel cells have been reported, including biofuel, proton-exchange membrane, and photocatalytic fuel cells. 468 Once again, bioderived precursors have proven advantageous for the manufacture of such materials. For wearable devices, the flexibility of all components, such as the electrode, the separator, and the current collector, is essential.…”

Section: Flexible Electrochemical Devicesmentioning

confidence: 99%

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Bioinspired and Bioderived Aqueous Electrocatalysis

et al. 2022

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The development of efficient and sustainable electrochemical systems able to provide clean-energy fuels and chemicals is one of the main current challenges of materials science and engineering. Over the last decades, significant advances have been made in the development of robust electrocatalysts for different reactions, with fundamental insights from both computational and experimental work. Some of the most promising systems in the literature are based on expensive and scarce platinum-group metals; however, natural enzymes show the highest per-site catalytic activities, while their active sites are based exclusively on earth-abundant metals. Additionally, natural biomass provides a valuable feedstock for producing advanced carbonaceous materials with porous hierarchical structures. Utilizing resources and design inspiration from nature can help create more sustainable and cost-effective strategies for manufacturing cost-effective, sustainable, and robust electrochemical materials and devices. This review spans from materials to device engineering; we initially discuss the design of carbon-based materials with bioinspired features (such as enzyme active sites), the utilization of biomass resources to construct tailored carbon materials, and their activity in aqueous electrocatalysis for water splitting, oxygen reduction, and CO 2 reduction. We then delve in the applicability of bioinspired features in electrochemical devices, such as the engineering of bioinspired mass transport and electrode interfaces. Finally, we address remaining challenges, such as the stability of bioinspired active sites or the activity of metal-free carbon materials, and discuss new potential research directions that can open the gates to the implementation of bioinspired sustainable materials in electrochemical devices.

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Section: Bioinspired Devicesmentioning

confidence: 99%

Section: Flexible Electrochemical Devicesmentioning

confidence: 99%

Bioinspired and Bioderived Aqueous Electrocatalysis

et al. 2022

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“…Due to the characteristics of traditional fuels such as non-renewable and environmentally destructive combustion products, energy conversion and replacement has become an inevitable choice for sustainable social development [1][2][3]. PEMFC is an electrical energy conversion device using clean gases (hydrogen and oxygen) as raw materials, and to a certain extent can achieve the ideal target of zero pollution because liquid water is its single product [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Research and Optimization of Four Serpentine-Wave Flow Fields in PEMFC

Yan,

Lu,

Yao

et al. 2024

J. Electrochem. Sci. Technol

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The layout of the cathode flow field largely determines the net output power of the proton exchange membrane fuel cell (PEMFC). To make the normal mass transfer effect best, the longitudinal channel was waved based on four serpentine flow channels, and the effects of sag depth and longitudinal channel width on the output efficiency of the cell were explored. The results show that the wave channel design systematically enhances the forced convection between adjacent channels, which can prevent a large zone of oxygen starvation zone at the outlet of the channel. The increase of the normal velocity in the gas transmission process will inevitably induce a significant enhancement of the mass transfer effect and obtain a higher current density in the reaction zone. For the longitudinal channel width, it is found that increasing its size in the effective range can greatly reduce the channel pressure drop without reducing the output power, thereby improving the overall efficiency. When the sag depth and longitudinal channel width gradient are 0.6 mm and 0.2 mm respectively, PEMFC can obtain the best comprehensive performance.

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“…To summarize the development of the flexible PEMFC, Yang et al focused on the operational system, fabrication approach, powergeneration property, and application demonstration of the flexible fuel cells [49]. However, there are few reviews focusing on the major components, assembly process, as well as the fuel and oxidant storage or supply system, which determine the performance, durability, and cost of the flexible PEMFC.…”

Section: Introductionmentioning

confidence: 99%