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Green synthesis of olefin-linked covalent organic frameworks for hydrogen fuel cell applications
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Green synthesis of olefin-linked covalent organic frameworks for hydrogen fuel cell applications
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Journal Article
Green synthesis of olefin-linked covalent organic frameworks for hydrogen fuel cell applications
2021
Overview
Green synthesis of crystalline porous materials for energy-related applications is of great significance but very challenging. Here, we create a green strategy to fabricate a highly crystalline olefin-linked pyrazine-based covalent organic framework (COF) with high robustness and porosity under solvent-free conditions. The abundant nitrogen sites, high hydrophilicity, and well-defined one-dimensional nanochannels make the resulting COF an ideal platform to confine and stabilize the H
3
PO
4
network in the pores through hydrogen-bonding interactions. The resulting material exhibits low activation energy (E
a
) of 0.06 eV, and ultrahigh proton conductivity across a wide relative humidity (10–90 %) and temperature range (25–80 °C). A realistic proton exchange membrane fuel cell using the olefin-linked COF as the solid electrolyte achieve a maximum power of 135 mW cm
−2
and a current density of 676 mA cm
−2
, which exceeds all reported COF materials.
Developing eco-friendly synthetic routes for fabricating robust covalent organic frameworks (COFs) remains a challenge. Herein, the authors created a green strategy to fabricate a highly crystalline olefin-linked COF which exhibited great promise application in proton exchange membrane fuel cell.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
