High-density sulfonic acid-grafted covalent organic frameworks with efficient anhydrous proton conduction

Guo, Yu‐Guo; Zou, Xiuyang; Li, Weizheng; Hu, Yaozhong; Jin, Zhiyu; Sun, Zhe; Gong, Shicheng; Guo, Siyu; Yan, Feng

doi:10.1039/d2ta00793b

Cited by 35 publications

(21 citation statements)

References 52 publications

(53 reference statements)

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“…The value of I D /I G (intensity ratio of D band and G band) was 0.435 for UiO-66 and 0.546 for the UiO-66-ionogel, indicating that the symmetry of the UiO-66 structure decreased, which was caused by the strong interaction between the polymer and UiO-66. 45,46 The interaction between the DMAA and IL with UiO-66 was investigated by molecular dynamics (MD) simulations. Coordination bonds could be observed between IL and UiO-66, as illustrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

Metal–organic framework (MOF) facilitated highly stretchable and fatigue-resistant ionogels for recyclable sensors

Zou

Zheng

et al. 2022

Mater. Horiz.

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Section: Resultsmentioning

confidence: 99%

Metal–organic framework (MOF) facilitated highly stretchable and fatigue-resistant ionogels for recyclable sensors

Zou

Zheng

et al. 2022

Mater. Horiz.

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“…Particularly, the IL-COF-SO 3 H@SNF-35, which loaded 35 wt% SNFs, acquired an ionic conductivity of 224 mS/cm at 90°C and 100% RH. Very recently, Yan's group developed a protic ionic liquid (PIL), 1-methyl-3-(3-sulfopropyl) imidazolium hydrogensulphate ([PSMIm] [HSO 4 ]) to incorporate with a high-density ▬SO 3 H functionalized COF (TB-COF) for efficient anhydrous proton conduction (Figure 7b) [43]. As expected, the addition of PIL into the nanochannels of COFs can significant increase the ionic conductivity from 1.52 × 10 −4 S/cm to 2.21 × 10 −3 S/cm at 120°C due to the increase of hopping sites for protons.…”

Section: Cofs For Proton Conductionmentioning

confidence: 99%

Covalent Organic Frameworks for Ion Conduction

Lü¹,

Gao²

2023

Covalent Organic Frameworks

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Covalent organic frameworks (COFs) are an emerging class of crystalline porous materials constructed by the precise reticulation of organic building blocks through dynamic covalent bonds. Due to their facile preparation, easy modulation and functionalization, COFs have been considered as a powerful platform for engineering molecular devices in various fields, such as catalysis, energy storage and conversion, sensing, and bioengineering. Particularly, the highly ordered pores in the backbones with controlled pore size, topology, and interface property provide ideal pathways for the long-term ion conduction. Herein, we summarized the latest progress of COFs as solid ion conductors in energy devices, especially lithium-based batteries and fuel cells. The design strategies and performance in terms of transporting lithium ions, protons, and hydroxide anions are systematically illustrated. Finally, the current challenges and future research directions on COFs in energy devices are proposed, laying the groundwork for greater achievements for this emerging material.

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“…Such improvement is ascribed to the exceptional water retention capability of capillary proton channels. Unfortunately, most reports on the application of COFs as proton exchange membranes require working temperatures below 100 °C to ensure stable proton conductivity, since their loaded proton carriers may be susceptible to leakage at high temperature . Therefore, there is still a huge challenge while considering their actual HT-PEMFC applications.…”

Section: Conductivity and Stability Of High-temperature Pemsmentioning

confidence: 99%

“…Unfortunately, most reports on the application of COFs as proton exchange membranes require working temperatures below 100 °C to ensure stable proton conductivity, since their loaded proton carriers may be susceptible to leakage at high temperature. 73 Therefore, there is still a huge challenge while considering their actual HT-PEMFC applications. It is more relevant to develop COFs with more stable proton-conductive performance at high temperature.…”

Section: Conductivity and Stability Of High-temperature Pemsmentioning

confidence: 99%

Current Challenges and Perspectives of Polymer Electrolyte Membranes

Zhang

et al. 2022

Macromolecules

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Polymer electrolyte membranes are charged polymers in the membrane shape, which can separate the anode reaction from the cathode reaction, allowing the fabrication of compact and highly efficient electrochemical devices. In recent years, great success has been witnessed in the development of advanced polymer electrolyte membranes, driven by the fast development of fuel cells that promise a clean and highly efficient sustainable energy supply. However, drawbacks limiting the widespread adoption of polymer electrolyte membranes still exist. These include the high cost of fluorinated polymer electrolyte membranes, the poor ion transport capability of non-fluorinated aromatic polymer-based polymer electrolyte membranes (especially under low-humidity conditions), the insufficient durability, and the function-led design of advanced polymer electrolyte membranes for applications beyond fuel cells. Herein we briefly discuss several important challenges that should be solved before polymer electrolyte membranes could be extensively adopted in real-world applications. These challenges include how to break through the limitation of phase-separation polymer electrolyte membrane design strategy on further increasing membrane conductivity, how to develop proton exchange membranes for high-temperature and low-humidity working environments, and how to design an alkaline-resistant anion exchange membrane and target its applications beyond hydrogen fuel cells. We also introduce breakthroughs made in these aspects during the past few years and suggest future directions that require extra attention.

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High-density sulfonic acid-grafted covalent organic frameworks with efficient anhydrous proton conduction

Abstract: Covalent organic frameworks (COFs) have attracted much attention in the field of high-temperature anhydrous proton conduction due to its high specific surface area and ordered one-dimensional nanochannels. Herein, a high...

Cited by 35 publications

References 52 publications

Metal–organic framework (MOF) facilitated highly stretchable and fatigue-resistant ionogels for recyclable sensors

Metal–organic framework (MOF) facilitated highly stretchable and fatigue-resistant ionogels for recyclable sensors

Covalent Organic Frameworks for Ion Conduction

Current Challenges and Perspectives of Polymer Electrolyte Membranes

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