Patterned mesoporous TiO2 microplates embedded in Nafion® membrane for high temperature/low relative humidity polymer electrolyte membrane fuel cell operation

Nam, Le Vu; Choi, Eunho; Jang, Segeun; Kim, Sang Moon

doi:10.1016/j.renene.2021.08.062

Cited by 22 publications

(10 citation statements)

References 26 publications

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“…The 0.5GO@mMMT/Nafion composite membrane-based single cell exhibited the highest power density of 546 mW·cm –2 at 50 °C in a humid environment as well as the lowest Ohmic resistance ( R Ω ) of 0.15 Ω, which was consistent with the conductivity results (Figure ). This peak power density of the 0.5GO@mMMT/Nafion composite membranes sample was more than 60% higher than that of the recast Nafion membrane (332 mW·cm –2 ) but also higher than the Nafion-based cell performance at 60 °C/20% RH, 80 °C/50% RH, and 80 °C/100% RH. − The GO@mMMT/Nafion-based PEMFC also presented the highest power density of 234 mW·cm –2 at 50 °C/30% RH and 166 mW·cm –2 at 50 °C under anhydrous conditions, as shown in Figure S6c. After the durability test, the open-circuit voltage of GO@mMMT/Nafion only decreased by 2.6% from 0.986 to 0.945 V after 72 h, as shown in Figure S6d.…”

Section: Resultsmentioning

confidence: 88%

Graphene Oxide-Intercalated Microbial Montmorillonite to Moderate the Dependence of Nafion-Based PEMFCs in High-Humidity Environments

Meng

Zou

et al. 2023

ACS Appl. Energy Mater.

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The most fatal disadvantage of Nafion-based proton-exchange membrane fuel cells (PEMFCs) is their significant performance losses at low relative humidities (RH ≤ 80%), making external humidification necessary. In this work, a graphene oxide (GO)-intercalated microbial montmorillonite (mMMT) layered stack (GO@mMMT) was prepared to enhance the proton conductivity of a Nafion membrane under a low humidity at elevated temperatures. The prepared mMMT had a high specific surface area and pore volume due to microbial mineralization, allowing GO to act as a spacer intercalated between MMT layers. This layered stack greatly enhanced the water absorbance and retention capacity of GO@mMMT/Nafion composite membranes. The GO@mMMT/Nafion composite membrane exhibited excellent proton conductivity under various humidities. Particularly, the 0.5GO@mMMT/Nafion sample achieved a proton conductivity of 36.4 mS·cm–1 at 80 °C/98% RH and 17.3 mS·cm–1 at 80 °C/20% RH, which was 82% and 188% higher than that of the recast Nafion membrane, respectively. The assembled single cell reached a peak power density of 546 mW·cm–2, which was 60% higher than that of the recast Nafion single cell. These results indicate that the Nafion composite membranes with GO@mMMT incorporated layered stacks show substantial potential for PEMFC applications with simplified water management.

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Section: Resultsmentioning

confidence: 88%

Graphene Oxide-Intercalated Microbial Montmorillonite to Moderate the Dependence of Nafion-Based PEMFCs in High-Humidity Environments

Meng

Zou

et al. 2023

ACS Appl. Energy Mater.

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“…It is encouraging for high-temperature applications, as recent studies have demonstrated that composite membranes based on PFSA have better mechanical stability and moisture retention. Hygroscopic inorganic materials such as silica, , titania, , zirconium oxide, and layered double hydroxides are commonly used as fillers for PFSA-based composite membranes. By permitting the silica nanoparticles to enter the Nafion framework with the swelled solvent and then uniformly filling into the Nafion matrix, Xu et al created a nondestructive silica/Nafion composite PEM (SF-Nafion).…”

Section: Pfsa-based Pemsmentioning

confidence: 99%

Perspectives on Membrane Development for High Temperature Proton Exchange Membrane Fuel Cells

Ying,

Liu,

Wang

et al. 2024

Energy Fuels

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High temperature proton exchange membrane fuel cells (HT-PEMFCs) are a promising energy conversion technology due to their quick reaction kinetics, high tolerance to CO impurities, and ease of heat and water management. Nevertheless, the practical implementation of this technology is limited since traditional proton exchange membranes (PEMs) exhibit significantly reduced performance at high temperatures and low humidity. In this extreme situation, researchers have concentrated on investigating new membranes through the creation of novel polymers and fillers or by suggesting sophisticated modification processes, with the goal of attaining high proton conductivity, stable mechanical properties, and tremendous temperature tolerance. This Review focuses on the latest advancements in four PEM domains: (1) perfluorosulfonic acid (PFSA)-based PEMs; (2) aromatic polymerbased PEMs; (3) polybenzimidazole (PBI)-based PEMs; and (4) polymer of intrinsic microporosity (PIM)-based PEMs. We describe and provide an overview of the preparation methods, mechanistic analysis, and core characteristics (proton conductivity and peak power density) of the aforementioned membrane materials. Furthermore, prospective research paths and challenges in the development of PEMs toward practical applications are also suggested.

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“…[17][18][19][20] The ordered proton conductors such as conical and cylindrical Nafion arrays were constructed to improve the proton transfer in MEA. [21][22][23][24][25][26] Nafion array is widely reported in proton exchange membrane fuel cells (PEMFCs) to provide the rapid proton transfer channels, as illustrated in Scheme 1c. [24,25,27] Since the structure of MEA in PEMWE is similar to PEMFCs, this array structure can also play a same role in PEMWE.…”

Section: Introductionmentioning

confidence: 99%

Hybrid 3D‐Ordered Membrane Electrode Assembly (MEA) with Highly Stable Structure, Enlarged Interface, and Ultralow Ir Loading by Doping Nano TiO₂ Nanoparticles for Water Electrolyzer

Liu,

Tian,

Ning

et al. 2023

Advanced Energy Materials

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Proton exchange membrane water electrolysis (PEMWE) is a very promising and sustainable hydrogen production technology. Currently, there is a growing interest in achieving ordered structures within membrane electrode assembly (MEA) for PEMWE. However, both ordered electron conductor and ordered proton conductor structures are single component structure, which still have many shortcomings. In this work, a hybrid ordered membrane electrodes assembly based on cone‐shaped is constructed Nafion array with rough surface by introducing TiO2 nanoparticles to Nafion emulsion. As a result, this hybrid ordered MEA achieves a high surface roughness of 3.39 nm that is 2.64 times higher than that of ordered MEA without TiO2 nanoparticles doped and current density up to 2.48 A cm−2 at 2 V with 14.4 µg cm−2 (Ir) catalyst loading. This work provides a new hybrid ordered structure for MEA and exhibits the great potential of enhancing the interfacial contact between the catalyst layer and Nafion membrane to improve PEMWE performance.

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Patterned mesoporous TiO2 microplates embedded in Nafion® membrane for high temperature/low relative humidity polymer electrolyte membrane fuel cell operation

Cited by 22 publications

References 26 publications

Graphene Oxide-Intercalated Microbial Montmorillonite to Moderate the Dependence of Nafion-Based PEMFCs in High-Humidity Environments

Graphene Oxide-Intercalated Microbial Montmorillonite to Moderate the Dependence of Nafion-Based PEMFCs in High-Humidity Environments

Perspectives on Membrane Development for High Temperature Proton Exchange Membrane Fuel Cells

Hybrid 3D‐Ordered Membrane Electrode Assembly (MEA) with Highly Stable Structure, Enlarged Interface, and Ultralow Ir Loading by Doping Nano TiO₂ Nanoparticles for Water Electrolyzer

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Patterned mesoporous TiO2 microplates embedded in Nafion® membrane for high temperature/low relative humidity polymer electrolyte membrane fuel cell operation

Cited by 22 publications

References 26 publications

Graphene Oxide-Intercalated Microbial Montmorillonite to Moderate the Dependence of Nafion-Based PEMFCs in High-Humidity Environments

Graphene Oxide-Intercalated Microbial Montmorillonite to Moderate the Dependence of Nafion-Based PEMFCs in High-Humidity Environments

Perspectives on Membrane Development for High Temperature Proton Exchange Membrane Fuel Cells

Hybrid 3D‐Ordered Membrane Electrode Assembly (MEA) with Highly Stable Structure, Enlarged Interface, and Ultralow Ir Loading by Doping Nano TiO2 Nanoparticles for Water Electrolyzer

Contact Info

Product

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Hybrid 3D‐Ordered Membrane Electrode Assembly (MEA) with Highly Stable Structure, Enlarged Interface, and Ultralow Ir Loading by Doping Nano TiO₂ Nanoparticles for Water Electrolyzer