Magnetic aligned sulfonated carbon nanotube/Nafion composite membranes with anisotropic mechanical and proton conductive properties

Qian, Libing; Yin, Chongshan; Liu, Lei; Zhang, Xiaowei; Li, Jingjing; Liu, Zhe; Zhang, Haining; Fang, Pengfei; He, Chunqing

doi:10.1007/s10853-020-05678-0

Cited by 12 publications

(4 citation statements)

References 80 publications

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“…Another challenge is the severe membrane dehydration at low relative humidity and elevated temperature that deteriorates proton transport process efficiency in PEM. This downside situation can be improved by having a magnetic-assisted polymeric membrane casting of ferrocyano-coordinated poly(4-vinylpyridine) (CP4VP)/phosphotungstic acid (PWA)/polysulfone (PSf) framework [16] or sulfonated multi-walled carbon nanotubes (Su-CNT) [17] or sulfonated graphene oxide (SGOs) [18] in Nafion composite membranes. Another recent findings of magnetically aligned phosphotungstic acid-decorated cobalt oxide in Nafion membrane has also shown a great increment in the selectivity of membrane for PEM application [19].…”

Section: Introductionmentioning

confidence: 99%

Magnetic field‐aligned proton exchange membranes: A review of progress and challenges in the fuel cell applications

Sean,

Nur,

Abdul Razak

et al. 2023

J Chinese Chemical Soc

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BackgroundThe well‐aligned proton exchange membrane (PEM) developed through magnetic field treatment has had a significant impact on the chemistry community related to fuel cell technologies. This is because it possesses advanced proton transport properties that can be efficiently utilized in energy storage devices. The aligned membrane boasts exceptional proton conductivity and power density, particularly in hydrogen‐oxygen fuel cell applications, due to its short proton conduction path, low dependency on humidity, and high barrier to gas permeability. These characteristics can enhance the performance of the aligned PEM.MethodsThis review outlines various methods for fabricating aligned membranes using a magnetic field. It summarizes the previous and current research and development aimed at improving the properties of the aligned PEM for fuel cell applications.Significant FindingsSeveral research gaps and challenges in enhancing the performance of magnetic field‐aligned PEM have been identified in this review, suggesting promising avenues for future research.

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Section: Introductionmentioning

confidence: 99%

Magnetic field‐aligned proton exchange membranes: A review of progress and challenges in the fuel cell applications

Sean,

Nur,

Abdul Razak

et al. 2023

J Chinese Chemical Soc

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“…Long-side-chain (LSC) PFSA is the most commonly used membrane ionomer in the past few decades. Short-side-chain (SSC) PFSA has attracted widespread attention meanwhile. − Their chemical structures are different in the length of side chains, which causes a vital impact on the ion transport properties of the membrane. , The arrangement of hydrophilic proton conduction domains constitutes the morphological feature of PFSA membrane. ,, The water content of the proton exchange membrane would sharply increase when the cell operated at medium or high current density. Meanwhile, the cathode side of membrane will be flooding due to abundant production of water and electroosmotic resistance, while the anode side of membrane would become relatively dehydrated which results in a water concentration gradient.…”

Section: Introductionmentioning

confidence: 99%

“…25,26 The arrangement of hydrophilic proton conduction domains constitutes the morphological feature of PFSA membrane. 10,27,28 The water content of the proton exchange membrane would sharply increase when the cell operated at medium or high current density. Meanwhile, the cathode side of membrane will be flooding due to abundant production of water and electroosmotic resistance, while the anode side of membrane would become relatively dehydrated which results in a water concentration gradient.…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic Channel Volume Behavior on Proton Transport Performance of Proton Exchange Membrane in Fuel Cells

Huang

Zhao

Líu

et al. 2022

ACS Appl. Polym. Mater.

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Inadequate water balance causes water flooding in a fuel cell, leading to performance degradation. The hydrophilic channel volume is crucial to the proton conductivity of PEM, especially under a high water concentration gradient. Herein, the volume of the hydrophilic channel was controlled and optimized through adjusting the collocation of resins with different side-chain lengths, with the length acting as a key parameter for the in-depth research on the proton conductivity performance of PEMs. Membranes with different hydrophilic channel volumes were prepared and suggested that the volume of the hydrophilic channel boosted as the increase of the length gap between the matched side chains, which would benefit to proton conductivity of membrane. This study provides guidance for the structural design of proton exchange membrane with cell-flooding resistance and efficient proton conduction at a high water concentration gradient.

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“…First is the incorporation of some organic or inorganic fillers with Nafion ® to hinder the methanol crossover. Many studies have been conducted on incorporating different new materials, such as graphene oxide [12,13], silica [14], nanofibers [15], carbon nanotubes (CNTs) [16], and eggshell [17], with Nafion to enhance its physiochemical properties. However, it has mostly been reported that the combination of Nafion with nanocomposites does not influence the fuel crossover a great deal, which is due to the high affinity of Nafion for methanol [18].…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Water and Methanol Dynamics in Sulfonated Polyether Ether Ketone Nanocomposite Membranes Bearing Layered Double Hydroxides

et al. 2022

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Conventional Nafion membranes demonstrate a strong affinity for methanol, resulting in a high fuel crossover, poor mechanical stability, and thus poor performance in direct methanol fuel cells (DMFCs). This study involves the synthesis and physiochemical characterization of an alternative polymer electrolyte membrane for DMFCs based on sulfonated poly(ether ether ketone) and a layered double hydroxide (LDH) material. Nanocomposite membranes (sPL), with filler loading ranging between 1 wt% and 5 wt%, were prepared by simple solution intercalation and characterized by XRD, DMA, swelling tests, and EIS. For the first time, water and methanol mobility inside the hydrophilic channels of sPEEK-LDH membranes were characterized by NMR techniques. The introduction of LDH nanoplatelets improved the dimensional stability while having a detrimental effect on methanol mobility, with its self-diffusion coefficient almost two orders of magnitude lower than that of water. It is worth noting that anionic lamellae are directly involved in the proton transport mechanism, thus enabling the formation of highly interconnected paths for proton conduction. In this regard, sPL3 yielded a proton conductivity of 110 mS cm−1 at 120 °C and 90% RH, almost attaining the performance of the Nafion benchmark. The nanocomposite membrane also showed an excellent oxidative stability (over more than 24 h) during Fenton’s test at 80 °C. These preliminary results demonstrate that an sPL3 nanocomposite can be potentially and successfully applied in DMFCs.

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Magnetic aligned sulfonated carbon nanotube/Nafion composite membranes with anisotropic mechanical and proton conductive properties

Cited by 12 publications

References 80 publications

Magnetic field‐aligned proton exchange membranes: A review of progress and challenges in the fuel cell applications

Magnetic field‐aligned proton exchange membranes: A review of progress and challenges in the fuel cell applications

Hydrophilic Channel Volume Behavior on Proton Transport Performance of Proton Exchange Membrane in Fuel Cells

Elucidating the Water and Methanol Dynamics in Sulfonated Polyether Ether Ketone Nanocomposite Membranes Bearing Layered Double Hydroxides

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