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dc.contributor.author Chi, B
dc.contributor.author Ye, Y
dc.contributor.author Lu, X
dc.contributor.author Jiang, S
dc.contributor.author Du, L
dc.contributor.author Zeng, J
dc.contributor.author Ren, Jianwei
dc.contributor.author Liao, S
dc.date.accessioned 2019-11-18T05:39:24Z
dc.date.available 2019-11-18T05:39:24Z
dc.date.issued 2019-12
dc.identifier.citation Chi, B., et al. 2019. Enhancing membrane electrode assembly performance by improving the porous structure and hydrophobicity of the cathode catalyst layer. Journal of Power Sources, vol 443(15):1-7 en_US
dc.identifier.issn 0378-7753
dc.identifier.issn 1873-2755
dc.identifier.uri https://doi.org/10.1016/j.jpowsour.2019.227284
dc.identifier.uri https://www.sciencedirect.com/science/article/pii/S0378775319312777
dc.identifier.uri http://hdl.handle.net/10204/11215
dc.description Copyright: 2019 Elsevier. Due to copyright restrictions, the attached PDF file contains the abstract version of the full-text item. For access to the full-text item, please consult the publisher's website. The definitive version of the work is published in Journal of Power Sources, vol 443(15):1-7 en_US
dc.description.abstract Enhancing membrane electrode assembly (MEA) performance is an ongoing pursuit in the drive to meet the increasing demand for fuel cell technology. In the present study, we utilize carbon nanotubes (CNTs) as porosity enhancers and polytetrafluoroethylene (PTFE) as a surface modulating agent to develop a high-performance MEA with a more porous structure and greater hydrophobicity. By systematically investigating the effects of adding CNTs and PTFE, we find that the CNTs not only increase the porosity of the cathode catalyst layer (CCL) but also boost the utilization of the platinum(Pt) catalyst by increasing the exposure of Pt active sites and lowering the charge transfer resistance, due to CNTs’ superior electronic conductivity compared with carbon black. The hydrophobicity of the CCL is adjusted by adding an appropriate amount of PTFE, resulting in much better water management. The best-performing MEA contains 15 wt% CNTs and 30 wt% PTFE in the CCL. At voltages of 0.7 and 0.6 V, the discharge current densities reach 1000 and 1550 mA cm−2, respectively, with a maximum power density of 949 mW cm−2, compared to 750 and 1200 mA cm−2 and 789 mW cm−2 using a MEA without CNTs and PTFE. Our optimized MEA also exhibits significantly improved performance at low backpressure due to the increase in CCL porosity. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow;22855
dc.subject Carbon nanotubes en_US
dc.subject CNTs en_US
dc.subject Fuel cells en_US
dc.subject Hydrophobicity en_US
dc.subject Membrane electrode assembly en_US
dc.subject Porosity enhancers and polytetrafluoroethylene en_US
dc.subject PTFE en_US
dc.title Enhancing membrane electrode assembly performance by improving the porous structure and hydrophobicity of the cathode catalyst layer en_US
dc.type Article en_US


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