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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Spatially resolved oxygen reaction, water, and temperature distribution: Experimental results as a function of flow field and implications for polymer electrolyte fuel cell operation

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Author(s):
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Lopes, Thiago [1, 2, 3] ; Beruski, Otavio [4, 1] ; Manthanwar, Amit M. [5, 6] ; Korkischko, Ivan [1, 3] ; Pugliesi, Reynaldo [1] ; Stanojev, Marco Antonio [1] ; Garcia Andrade, Marcos Leandro [1] ; Pistikopoulos, Efstratios N. [5, 6] ; Perez, Joelma [4] ; Fonseca, Fabio Coral [1] ; Meneghini, Julio Romano [3] ; Kucernak, Anthony R. [2]
Total Authors: 12
Affiliation:
[1] IPEN CNEN SP, Nucl & Energy Res Inst, BR-05508000 Sao Paulo, SP - Brazil
[2] Imperial Coll London, Dept Chem, South Kensington Campus, London SW7 2AZ - England
[3] Univ Sao Paulo, Res Ctr Gas Innovat, Escola Politecn, Ave Prof Mello Moraes 2231, BR-05508030 Sao Paulo, SP - Brazil
[4] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
[5] Imperial Coll London, Dept Chem Engn, London SW7 2AZ - England
[6] Texas A&M Energy Inst, College Stn, TX - USA
Total Affiliations: 6
Document type: Journal article
Source: APPLIED ENERGY; v. 252, OCT 15 2019.
Web of Science Citations: 0
Abstract

In situ and ex situ spatially-resolved techniques are employed to investigate reactant distribution and its impacts in a polymer electrolyte fuel cell. Temperature distribution data provides further evidence for secondary flows inferred from reactant imaging data, highlighting the contribution of convection in heat as well as reactant distribution. Water build-up from neutron tomography is linked to component degradation, matching the pattern seen in the reactant distribution and thus suggesting that high, non-uniform local current densities shape degradation patterns in fuel cells. The correlations shown between different techniques confirm the use of the versatile reactant imaging technique, which is used to compare commonly used flow field designs. Among serpentine-type designs, the single serpentine is superior in both equivalent current density and reactant distribution, showing large contributions from convective flow. On the other hand, the interdigitated design is shown to produce larger equivalent current densities, while showing a somewhat poorer reactant distribution. Considering the correlations drawn between the techniques, this suggests that the interdigitated design compromises durability in favour of power output. The results highlight how established techniques provide a robust background for the use of a new and flexible imaging technique toward designing advanced flow fields for practical fuel cell applications. (AU)

FAPESP's process: 16/12397-0 - Flow field optimization of fuel cells by using numerical methods
Grantee:Ivan Korkischko
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/11316-9 - Modeling and simulation of proton exchange membrane fuel cell
Grantee:Otávio Beruski
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
Grantee:Julio Romano Meneghini
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 14/09087-4 - Studies on the use of bioethanol in proton exchange membrane and solid oxide fuel cells
Grantee:Marcelo Linardi
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/11937-4 - A sustainable path to methane conversion by advanced electrochemical technologies
Grantee:Fabio Coral Fonseca
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 14/22130-6 - Electrocatalysis beyond platinum: development of sustainable electrocatalysts
Grantee:Thiago Lopes
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 17/15304-6 - Electrocatalysis beyond platinum: development of sustainable electrocatalysts
Grantee:Thiago Lopes
Support Opportunities: Scholarships in Brazil - Young Researchers