A novel catalyst layer structure based surface-patterned Nafion® membrane for high-performance direct methanol fuel cell

Ming Chen, Meng Wang, Xianan Ding, Qingfeng Li, Xindong Wang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Conventional catalyst layer with a smooth surface exists the larger area of“catalytic dead zone” and reduces the utilization of catalyst. Based on this, a novel catalyst layer structure based surface-patterned Nafion® membrane was designed to achieve more efficient electrochemical reaction in this work. Surface-patterned Nafion® membranes were prepared by hot pressing with different pressures, and their swelling degrees reduced obviously with the increase of pressure, but proton conductivities of the membranes were almost unchanged. Pre-swelling and direct-spraying deposition methods were used to prepare the novel catalyst layer, and the effect of pressure on the performance of MEA was investigated. The results suggested that the peak power density of DMFC with optimal novel catalyst layer structure increased by 28.84%, the charge transfer resistances of anode and cathode reduced by 28.8% and 26.5% respectively, compared with the conventional catalyst layer. Performance improvement is attributed to the fact that the novel catalyst layer structure optimizes the electrolyte membrane/catalyst layer and gas diffusion layer/catalyst layer interfacial structure, which increases the electrochemical reaction region and reaction sites. The novel catalyst layer with a three-dimensional curved surface structure enlarges the “three-phase boundaries (TPB)” and electrochemical active surface area (ECSA) of membrane electrode assembly (MEA). Therefore, this work provides an effective solution to achieve the high performance of DMFC by optimizing the internal interface structure of electrode, which is helpful to the future development of DMFC.
Original languageEnglish
JournalElectrochimica Acta
Volume263
Pages (from-to)201-208
ISSN0013-4686
DOIs
Publication statusPublished - 2018

Cite this

@article{d7abab329ddb4927b0547d5b4515b2f1,
title = "A novel catalyst layer structure based surface-patterned Nafion{\circledR} membrane for high-performance direct methanol fuel cell",
abstract = "Conventional catalyst layer with a smooth surface exists the larger area of“catalytic dead zone” and reduces the utilization of catalyst. Based on this, a novel catalyst layer structure based surface-patterned Nafion{\circledR} membrane was designed to achieve more efficient electrochemical reaction in this work. Surface-patterned Nafion{\circledR} membranes were prepared by hot pressing with different pressures, and their swelling degrees reduced obviously with the increase of pressure, but proton conductivities of the membranes were almost unchanged. Pre-swelling and direct-spraying deposition methods were used to prepare the novel catalyst layer, and the effect of pressure on the performance of MEA was investigated. The results suggested that the peak power density of DMFC with optimal novel catalyst layer structure increased by 28.84{\%}, the charge transfer resistances of anode and cathode reduced by 28.8{\%} and 26.5{\%} respectively, compared with the conventional catalyst layer. Performance improvement is attributed to the fact that the novel catalyst layer structure optimizes the electrolyte membrane/catalyst layer and gas diffusion layer/catalyst layer interfacial structure, which increases the electrochemical reaction region and reaction sites. The novel catalyst layer with a three-dimensional curved surface structure enlarges the “three-phase boundaries (TPB)” and electrochemical active surface area (ECSA) of membrane electrode assembly (MEA). Therefore, this work provides an effective solution to achieve the high performance of DMFC by optimizing the internal interface structure of electrode, which is helpful to the future development of DMFC.",
author = "Ming Chen and Meng Wang and Xianan Ding and Qingfeng Li and Xindong Wang",
year = "2018",
doi = "10.1016/j.electacta.2018.01.015",
language = "English",
volume = "263",
pages = "201--208",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Pergamon Press",

}

A novel catalyst layer structure based surface-patterned Nafion® membrane for high-performance direct methanol fuel cell. / Chen, Ming; Wang, Meng ; Ding, Xianan; Li, Qingfeng; Wang, Xindong.

In: Electrochimica Acta, Vol. 263, 2018, p. 201-208.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A novel catalyst layer structure based surface-patterned Nafion® membrane for high-performance direct methanol fuel cell

AU - Chen, Ming

AU - Wang, Meng

AU - Ding, Xianan

AU - Li, Qingfeng

AU - Wang, Xindong

PY - 2018

Y1 - 2018

N2 - Conventional catalyst layer with a smooth surface exists the larger area of“catalytic dead zone” and reduces the utilization of catalyst. Based on this, a novel catalyst layer structure based surface-patterned Nafion® membrane was designed to achieve more efficient electrochemical reaction in this work. Surface-patterned Nafion® membranes were prepared by hot pressing with different pressures, and their swelling degrees reduced obviously with the increase of pressure, but proton conductivities of the membranes were almost unchanged. Pre-swelling and direct-spraying deposition methods were used to prepare the novel catalyst layer, and the effect of pressure on the performance of MEA was investigated. The results suggested that the peak power density of DMFC with optimal novel catalyst layer structure increased by 28.84%, the charge transfer resistances of anode and cathode reduced by 28.8% and 26.5% respectively, compared with the conventional catalyst layer. Performance improvement is attributed to the fact that the novel catalyst layer structure optimizes the electrolyte membrane/catalyst layer and gas diffusion layer/catalyst layer interfacial structure, which increases the electrochemical reaction region and reaction sites. The novel catalyst layer with a three-dimensional curved surface structure enlarges the “three-phase boundaries (TPB)” and electrochemical active surface area (ECSA) of membrane electrode assembly (MEA). Therefore, this work provides an effective solution to achieve the high performance of DMFC by optimizing the internal interface structure of electrode, which is helpful to the future development of DMFC.

AB - Conventional catalyst layer with a smooth surface exists the larger area of“catalytic dead zone” and reduces the utilization of catalyst. Based on this, a novel catalyst layer structure based surface-patterned Nafion® membrane was designed to achieve more efficient electrochemical reaction in this work. Surface-patterned Nafion® membranes were prepared by hot pressing with different pressures, and their swelling degrees reduced obviously with the increase of pressure, but proton conductivities of the membranes were almost unchanged. Pre-swelling and direct-spraying deposition methods were used to prepare the novel catalyst layer, and the effect of pressure on the performance of MEA was investigated. The results suggested that the peak power density of DMFC with optimal novel catalyst layer structure increased by 28.84%, the charge transfer resistances of anode and cathode reduced by 28.8% and 26.5% respectively, compared with the conventional catalyst layer. Performance improvement is attributed to the fact that the novel catalyst layer structure optimizes the electrolyte membrane/catalyst layer and gas diffusion layer/catalyst layer interfacial structure, which increases the electrochemical reaction region and reaction sites. The novel catalyst layer with a three-dimensional curved surface structure enlarges the “three-phase boundaries (TPB)” and electrochemical active surface area (ECSA) of membrane electrode assembly (MEA). Therefore, this work provides an effective solution to achieve the high performance of DMFC by optimizing the internal interface structure of electrode, which is helpful to the future development of DMFC.

U2 - 10.1016/j.electacta.2018.01.015

DO - 10.1016/j.electacta.2018.01.015

M3 - Journal article

VL - 263

SP - 201

EP - 208

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

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