Enhanced mechanical durability of perfluorosulfonic acid proton-exchange membrane based on a double-layer ePTFE reinforcement strategy

Liu, Lei; Xing, Yijing; Li, Yifan; Fu, Zhiyong; Li, Zhuoqun; Li, Haibin

doi:10.1016/j.ijhydene.2022.06.199

Cited by 17 publications

(18 citation statements)

References 43 publications

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“…This was due to the stronger reinforcing function of the two layers of ePTFE skeletons. In our previous study, we revealed that the double-layer ePTFE-reinforced PFSA membranes had lower swelling and superior mechanical properties than single-layer ePTFE-reinforced PFSA membranes due to the stronger dimensional constraint effect of the double-layer ePTFE skeletons. Therefore, the DRM in the DR-MEA was endowed with higher resistance to hydrogen penetration compared with the Gore membrane in the C-MEA based on the single-layer ePTFE reinforcement.…”

Section: Resultsmentioning

confidence: 98%

“…First, in the DR-MEA, with the reinforcement of the double-layer ePTFE and the support of rigid GDEs to the PEM, the swelling of the PEM in the DR-MEA was restrained. Such reduced swelling deformation contributed to the less mechanical degradation of the PEM in the DR-MEA. , In addition, in the DR-MEA, the interfacial anchoring effect between the PFSA ionomer and surficial pores of the CLs facilitated the forming of the robust PEM/CL interface, which had the stronger interfacial bonding strength to resist the interfacial delamination caused by membrane swelling deformation …”

Section: Resultsmentioning

confidence: 99%

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Double-Layer ePTFE-Reinforced Membrane Electrode Assemblies Prepared by a Reverse Membrane Deposition Process for High-Performance and Durable Proton Exchange Membrane Fuel Cells

Liu

Xing

et al. 2023

ACS Appl. Mater. Interfaces

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To promote further commercialization of proton exchange membrane (PEM) fuel cells, developing a novel preparation method for high-performance and durable membrane electrode assemblies (MEAs) is imperative. In this study, we adopt the reverse membrane deposition process and expanded polytetrafluoroethylene (ePTFE) reinforcing technology to optimize the interface combination and durability of MEAs simultaneously for the preparation of novel MEAs with double-layer ePTFE reinforcement skeletons (DR-MEA). With the wet-contact between the liquid ionomer solution and porous catalyst layers (CLs), a tight 3D PEM/CL interface is formed in the DR-MEA. Based on this enhanced PEM/CL interface combination, the DR-MEA exhibits a significantly increased electrochemical surface area, reduced interfacial resistance, and improved power performance compared with a conventional MEA (C-MEA) based on a catalyst-coated membrane method. Furthermore, with the reinforcement of double-layer ePTFE skeletons and the support of rigid electrodes for the membranes, the DR-MEA demonstrates less mechanical degradation than the C-MEA after wet/dry cycle test, reflected in lower increase in hydrogen crossover current, interfacial resistance, and charge-transfer resistance and reduced power performance attenuation. With less mechanical degradation, the DR-MEA therefore shows less chemical degradation than the C-MEA after an open-circuit voltage durability test.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Double-Layer ePTFE-Reinforced Membrane Electrode Assemblies Prepared by a Reverse Membrane Deposition Process for High-Performance and Durable Proton Exchange Membrane Fuel Cells

Liu

Xing

et al. 2023

ACS Appl. Mater. Interfaces

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“…24 Furthermore, the addition of expanded polytetrafluoroethylene skeletons to the new PEM models significantly improved the mechanical durability of the membranes. 24,109 The composite PEMs ensure membrane performance and enhance mechanical strength and chemical durability, which are critical for improving the performance of PEMFCs. 110…”

Section: Proton Exchange Membranes (Pems) In Pemfcs With High Specifi...mentioning

confidence: 99%

“…24 Furthermore, the addition of expanded polytetrauoroethylene skeletons to the new PEM models signicantly improved the mechanical durability of the membranes. 24,109 The composite PEMs ensure membrane performance and enhance mechanical strength and chemical durability, which are critical for improving the performance of PEMFCs. 110 Although PFSA has been successfully commercialized in lowtemperature PEMFCs, its proton conductivity is signicantly reduced under certain environmental conditions, such as high temperatures and low humidity.…”

Section: Proton Exchange Membranes (Pems) In Pemfcs With High Specifi...mentioning

confidence: 99%

Designing proton exchange membrane fuel cells with high specific power density

Zhao

Tao

et al. 2023

J. Mater. Chem. A

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“…As the climate warming gradually become a global consensus, the nations of the world are vigorously developing clean energy technologies to reduce carbon emissions produced by the fossil energy. Proton exchange membrane fuel cells (PEMFCs) have become one of the promoting power generation systems in the 21st century due to its high density of energy, simple design, low operation temperature and zerocarbon emissions [1][2][3][4][5][6]. As a critical component in PEMFCs system, proton exchange membrane (PEM) works as H+ conductor and separator between oxygen and fuel [7,8].…”

Section: Introductionmentioning

confidence: 99%

Improved performance of nafion membranes by blending ultra-high molecular weight polyvinylidene fluoride

2022

J. Phys.: Conf. Ser.

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Proton exchange membrane (PEM) is developing towards thin thickness and high mechanical strength for extraordinary performance proton exchange membrane fuel cells (PEMFCs). However, the commercial membrane such as Nafion can hardly satisfy the practical application of PEMFCs because of high gas crossover and low mechanical strength when the thickness is less than 20 μm. Here, a reinforced composite membrane (denoted as P110-PFSA) was synthesized by blending poly(vinylidene fluoride)(PVDF) featured with high molecular weight of Mw= 1100000 g mol-1 into perfluorosulfonic acid resin (PFSA). The P110-PFSA with the thickness of 15 μm exhibits tensile strength of over 33 MPa because the PVDF with high molecular weight forms a higher density of hydrogen bonds with PFSA, resulting in a reinforcement of the bonding strength between PVDF and PFSA. H2/O2 fuel cell performance with the P110-PFSA shows more than 1170 mW cm-2 fed with H2 at 70 °C and 100% RH much better than that with Nafion 211. Direct methanol fuel cell power densities of the blent PEM are 92, 61, 50, 28 and 15 mW cm-2 fed with 2, 6, 10,16 and 20 M methanol solution respectively at the anode.

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Enhanced mechanical durability of perfluorosulfonic acid proton-exchange membrane based on a double-layer ePTFE reinforcement strategy

Cited by 17 publications

References 43 publications

Double-Layer ePTFE-Reinforced Membrane Electrode Assemblies Prepared by a Reverse Membrane Deposition Process for High-Performance and Durable Proton Exchange Membrane Fuel Cells

Double-Layer ePTFE-Reinforced Membrane Electrode Assemblies Prepared by a Reverse Membrane Deposition Process for High-Performance and Durable Proton Exchange Membrane Fuel Cells

Designing proton exchange membrane fuel cells with high specific power density

Improved performance of nafion membranes by blending ultra-high molecular weight polyvinylidene fluoride

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