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A Scalable and Robust Water Management Strategy for PEMFCs: Operando Electrothermal Mapping and Neutron Imaging Study.
Xu, Linlin; Trogadas, Panagiotis; Zhou, Shangwei; Jiang, Shuxian; Wu, Yunsong; Rasha, Lara; Kockelmann, Winfried; Yang, Jia Di; Neville, Toby; Jervis, Rhodri; Brett, Dan J L; Coppens, Marc-Olivier.
Afiliación
  • Xu L; Centre for Nature-Inspired Engineering, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
  • Trogadas P; Centre for Nature-Inspired Engineering, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
  • Zhou S; Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece.
  • Jiang S; Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
  • Wu Y; Centre for Nature-Inspired Engineering, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
  • Rasha L; Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
  • Kockelmann W; School of Electrical Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 611756, China.
  • Yang JD; Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
  • Neville T; The Faraday Institution, Quad One, Harwell Science and Innovation Campus, Didcot, OX11 0RA, UK.
  • Jervis R; Science and Technology Facilities Council, Rutherford Appleton Laboratory, ISIS Facility, Harwell Oxford, OX11 0QX, UK.
  • Brett DJL; Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
  • Coppens MO; Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
Adv Sci (Weinh) ; 11(36): e2404350, 2024 Sep.
Article en En | MEDLINE | ID: mdl-39052888
ABSTRACT
Effective water management is crucial for the optimal operation of low-temperature polymer electrolyte membrane fuel cells (PEMFCs). Excessive liquid water production can cause flooding in the gas diffusion electrodes and flow channels, limiting mass transfer and reducing PEMFC performance. To tackle this issue, a nature-inspired chemical engineering (NICE) approach has been adopted that takes cues from the integument structure of desert-dwelling lizards for passive water transport. By incorporating engraved, capillary microchannels into conventional flow fields, PEMFC performance improves significantly, including a 15% increase in maximum power density for a 25 cm2 cell and 13% for a 100 cm2 cell. Electro-thermal maps of the lizard-inspired flow field demonstrate a more uniform spatial distribution of current density and temperature than the conventional design. Neutron radiography provides evidence that capillary microchannels in the lizard-inspired flow field facilitate the efficient transport and removal of generated liquid water, thereby preventing blockages in the reactant channels. These findings present a universally applicable and highly efficient water management strategy for PEMFCs, with the potential for widespread practical implementation for other electrochemical devices.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2024 Tipo del documento: Article Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2024 Tipo del documento: Article Pais de publicación: Alemania