Proton Conductor Confinement Strategy for Polymer Electrolyte Membrane Assists Fuel Cell Operation in Wide‐Range Temperature

Zhang, Jujia; Chen, Sian; Wei, Haibing; Zhang, Jin; Wang, Haining; Lu, Shanfu; Xiang, Yan

doi:10.1002/adfm.202214097

Cited by 12 publications

(11 citation statements)

References 52 publications

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“…The long-term stability of the zeolite particles can be achieve through accelerated aging tests [38][39][40][41]. Establish a simpli ed formula for accelerated aging based on the Arrhenius reaction rate function: Among them, AAT: accelerated aging time; RT: real time; Q 10 : ageing coe cient with a temperature increase or decrease of 10 ℃; T AA : temperature of accelerated aging; T RT : Temperature under normal storage conditions.…”

Section: Resultsmentioning

confidence: 99%

Template-free method synthesized NaxCa2.38-xAl2Si57.2O118.59 zeolite particles for enhanced stability

Xia,

Ma,

Qin

et al. 2024

Preprint

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Zeolites have been shown to accelerate hemostasis, improve trauma healing, and provide the resulting multifunctional hemostatic materials, due to their distinctive microporous structure and interfacial properties. However, natural zeolites general contain impurities and it is difficult to produce hemostatic powder of appropriate size using direct crushing methods. Herein, we develop a template free one-step hydrothermal process to synthesized NaxCa2.38−xAl2Si57.2O118.59 zeolite particles with controllable size. The size of NaxCa2.38−xAl2Si57.2O118.59 zeolite particles can be controlled from 1 to 10 µm. The ordered pores in the synthesized NaxCa2.38−xAl2Si57.2O118.59 zeolites exhibit a typical two-dimensional hexagonal structure. The synthesized zeolites exhibit excellent stability in both natural environments and serum. The Na2.38Al2Si57.2O118.59 zeolite particles maintain high stability of morphology and structure after water flow treatment. Those stability results ensure the preservation and use possibility of zeolite hemostatic powder in special environments, such as battlefield, underwater, and extreme weather.

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Section: Resultsmentioning

confidence: 99%

Template-free method synthesized NaxCa2.38-xAl2Si57.2O118.59 zeolite particles for enhanced stability

Xia,

Ma,

Qin

et al. 2024

Preprint

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show abstract

“…Polymers containing strong basic groups are good candidates for replacing the PBI-based polymers, with some representative examples summarized in Table 5. [37][38][39][102][103][104][105][106][107] The strong basic sites in backbones or side chains could efficiently rivet the PA molecules, thus enabling its possible application in wide temperature and humidity windows. For example, Lee et al [37] have prepared quaternary ammonium (QA)-biphosphate ionpair-coordinated polyphenylene (PA-doped QAPOH) PEMs, and the strong QA + …H 2 PO 4 − interactions enabled a high PA retention, a stable conductivity, and improved performance at 80-160 °C.…”

Section: Pa-polymer Containing Basic Groupsmentioning

confidence: 99%

“…After 150 cycles of start-up/shut-down testing, the DMBO-TB/PA membrane displayed 95% power density retention at 15 °C and can accomplish over 100 cycles even at −20 °C (Figure 6c). Besides, Zhang et al [39] have developed novel a material (pendent imidazole-functionalized polyphenylene oxide (PPO)) with the PA molecules trapping sites located in the side chains. The design rules can not only weak plasticizing ef-fect caused by PA toward the polymer backbone to maintain good tensile stress, but also induce micro-phase separation structure to improve the PA retention (Figure 6d,e).…”

Section: Pa-polymer Containing Basic Groupsmentioning

confidence: 99%

“…PA-doped PPO-g-Az-6 [39] -12.1 62 (160°C) 576 (160 °C, H 2 /O 2 ) SPFTP-50 [ 102] 162.8 PA doped TDAP-PSU-88 [ 107] 186. -represents that no specific value is given in the references.…”

Section: Degradation Mechanisms Of Sa-containing Membranes and Mitiga...mentioning

confidence: 99%

mentioning

confidence: 99%

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Rational Materials and Structure Design for Improving the Performance and Durability of High Temperature Proton Exchange Membranes (HT‐PEMs)

Song,

Zhao,

Zhou

et al. 2023

Advanced Science

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Hydrogen energy as the next‐generation clean energy carrier has attracted the attention of both academic and industrial fields. A key limit in the current stage is the operation temperature of hydrogen fuel cells, which lies in the slow development of high‐temperature and high‐efficiency proton exchange membranes. Currently, much research effort has been devoted to this field, and very innovative material systems have been developed. The authors think it is the right time to make a short summary of the high‐temperature proton exchange membranes (HT‐PEMs), the fundamentals, and developments, which can help the researchers to clearly and efficiently gain the key information. In this paper, the development of key materials and optimization strategies, the degradation mechanism and possible solutions, and the most common morphology characterization techniques as well as correlations between morphology and overall properties have been systematically summarized.

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Nitrogen‐Rich Rigid Polybenzimidazole With Phosphoric Acid Shows Promising Electrochemical Activity and Stability for High‐Temperature Proton Exchange Membrane Fuel Cells

Gao

Wang

et al. 2023

Adv Funct Materials

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Polybenzimidazoles (PBIs) are the most promising binders for the catalyst layer (CL) in high‐temperature proton exchange membrane fuel cells (HT‐PEMFC). However, traditional commercial PBIs are not applied in binders because they do not enhance the electrochemical performance and because the related solvents are not environmentally friendly. In addition, proton transfer channels in PBIs are not investigated at the microscopic and atomic scales to date. In this study, a nitrogen‐rich rigid PBI binder containing pyridine, diazofluorene, and partially grafted nitrile (PBPBI‐3CN) is prepared with a functionalized structure, good thermal stability, and good solubility in an environmentally friendly solvent. A membrane electrode assembly (MEA) is fabricated with the PBPBI‐3CN binder, providing a high peak power density, low resistance, and good stability. The protonation, hydrogen bond networks, and platform for proton transfer are confirmed in the CLs. The protonation of PBPBI‐3CN occurs in two steps. First, some phosphoric acid (PA) molecules bind to nitrogen‐containing acidophilic groups via preliminary protonation; second, multiple PA molecules then interact with nitrogen‐containing acidophilic groups via further protonation. With protonation as the foundation, a sufficient amount of PA molecules form a hydrogen bond network, and proton transfer channels are established.

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Proton Conductor Confinement Strategy for Polymer Electrolyte Membrane Assists Fuel Cell Operation in Wide‐Range Temperature

Cited by 12 publications

References 52 publications

Template-free method synthesized NaxCa2.38-xAl2Si57.2O118.59 zeolite particles for enhanced stability

Template-free method synthesized NaxCa2.38-xAl2Si57.2O118.59 zeolite particles for enhanced stability

Rational Materials and Structure Design for Improving the Performance and Durability of High Temperature Proton Exchange Membranes (HT‐PEMs)

Nitrogen‐Rich Rigid Polybenzimidazole With Phosphoric Acid Shows Promising Electrochemical Activity and Stability for High‐Temperature Proton Exchange Membrane Fuel Cells

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